THE 3rd ACADEMIC
CONFERENCE ON NATURAL
SCIENCE FOR MASTER AND PhD.
STUDENTS FROM ASEAN
COUNTRIES
11-15 November 2013,
Phnom Penh, Cambodia
http://iop.vast.ac.vn/activities/conf_asean/
CASEAN - 2013
Organizers
Royal University of Phnom Penh (RUPP)
Vietnam Academy of Science and Technology (VAST)
National University of Laos (NUOL)
Vietnam National University, Ho Chi Minh (VNUH)
Vietnam National University, Hanoi (VNU)
Universiti Teknologi Malaysia (UTM)
Vietnam Physical Society (VPS)
Institute of Physics (IOP) VAST
University of Science and Technology of Hanoi (USTH)
Sponsors
Vietnam Academy of Science and Technology (VAST)
Royal University of Phnom Penh (RUPP)
Vietnam National University, Ho Chi Minh (VNUH)
Institute of Physics, VAST
International Science Program, Sweden
Horiba Scientific
University of Science and Technology of Hanoi (USTH)
2
Conference President:
Prof. Acad. Nguyen Van Hieu (VAST)
Co – Chairmen
Prof. Meak Kamerane, Dean of Faculty of Science, RUPP, Cambodia
Prof. Dr. Nguyen Dai Hung, President, VSOS, Vietnam
Prof. Dr. Madzlan Bin Aziz, Dean, Universiti Teknologi Malaysia
Prof. Dr. Huynh Thanh Dat, Vice President, Vietnam National Uni. HCM
Prof. Dr. Somsy Gnophanxay, Vice President of NUOL, Laos
Prof. Dr. Nguyen The Binh, Vietnam National University Hanoi
Prof. Dr. Pierre Sebban, Rector of USTH
Conference Secretariat
Dr. Pham Hong Minh and Dr. Vu Duong
Institute of Physics,
10 Dao Tan Str. Ba Dinh, Hanoi, Vietnam
Phone: (84 4) 3791 6579; Fax: (84 4) 3791 6579
Email: casean@iop.vast.ac.vn
Dr. Le Vu Tuan Hung
Vietnam National University in Ho Chi Minh City
227 Nguyen Van Cu, Distr. 5, Ho Chi Minh City, Vietnam
Email: lthung@phys.hcmuns.edu.vn
Mr. Tharith Sriv
Royal University of Phnom Penh, Cambodia
Russian Federation Boulevard, Toul Kork, Phnom Penh 12101
Email: tharith@rupp.edu.kh
3
18:00
13:30 17:00
12:15-13:30
8:00  12:15
Time
Date
REGISTRATION
ARRIVAL
& CHECK IN
11st November
Monday
- POSTER II
- POSTER I
(offered by Royal
University of Phnom
Penh)
WELCOME PARTY
- REPORT SESSION
Buffet Lunch
- REPORT SESSION
13rd November
Wednesday
- REPORT SESSION
Buffet Lunch
- PLENARY SESSION
- OFFICIAL OPENING
- RUPP MUSIC
PERFORMANCE
(7:30-8:30AM)
- REGISTRATION
12sd November
Tuesday
(offered by CASEAN
Organizing Committee)
CONFERENCE
PARTY
- CLOSING
- PLENARY SESSION
Buffet Lunch
- REPORT SESSION
14th November
Thursday
15th November
Friday
University of
Phnom Penh)
(offered by Royal
ONE-DAY TOUR TO
HISTORICAL &
CULTURAL RELIC
IN PHNOM PENH,
CAMBODIA
Conference location: Cambodia-Korea Cooperation Center (CKCC)-Royal University of Phnom Penh
Russian Federation Boulevard, Toul Kork, Phnom Penh 12101, Cambodia
BRIEF PROGRAMME
PROGRAM
Monday – November 11, 2013
13:30-17:00
- Arrival and check in
- Registration at Royal University of Phnom Penh
Tuesday – November 12, 2013
07: 30 - 08: 30
Registration
08:00 – 08: 30
Music performance
08: 30 - 09: 00
Official Opening (Prof. Meak Kamerane, Dean, RUPP)
Welcoming speech H. E. Prof. Dr. Cheat Chealy, Rector RUPP,
Cambodia.
Speech by Prof. Dr. Santi Maensiri, Dean, Suranaree University
Teknology, Thailand.
Speech by Rector, University of Science and Technology of Hanoi.
Opening speech Prof. Acad. Nguyen Van Hieu, Conference
President, VSP, Vietnam
REPORT SESSION
Chairperson: Dr. Tieng Siteng (RUPP)
Prof. Nguyen The Binh (VNU-Hanoi)
O-01
09:00 - 09:25
DEVELOPING RESEARCH CULTURE AMONG POSTGRADUATE
STUDENTS: UTM EXPERIENCE AS A REASEARCH UNIVERSITY
(Invited talk)
Madzlan Bin Aziz
Faculty of Science University of Technology Malaysia
5
O-02
09:25 – 09:50
PHYSICS AND APPLICATIONS OF GRAPHENE
(Invited talk)
Hyeonsik Cheong
Sogang University, Korea
O-03
09:50 – 10:15
PHOTONIC CRYSTAL MICROCAVITY DEVICES
(Invited talk)
Van Hoi Pham, Huy Bui, The Anh Nguyen, Thanh Son Pham,
Thuy Van Nguyen, Quang Minh Ngo
Institute of Materials Science, VAST, Vietnam
10:15 – 10:30
CONFERENCE PHOTOGRAPH
COFFEE BREAK
REPORT SESSION
Chairperson: Ms. Chea Eliyan (RUPP)
Prof. Santi Maensiri (Suranaree Uni., Thailand)
O-04
10:30 – 10:55
FILTERING, MODULATION AND DIFFRACTION: FROM SIGNAL
PROCESSING TO FOURIER OPTICS
(Invited talk)
Roberto Coisson
University of Parma, Italy
O-05
10:55-11:20
VARIOUS LIGHT ENERGY CONVERTING PROTEINS OF
BACTERIA FROM TONLE SAP LAKE, CAMBODIA
(Invited talk)
Kwang-Hwan Jung
Sogang University, Korea
O-06
11:20-11:35
INFLUENCE OF THE FEEDBACK STAGE TO THE VERTICAL
MOTION STABLE TRANSITION PROCESS OF FIREFLIGHTING
AIRCRAFT
6
Nguyen Quang Vinh, Phan Tuong Lai, Nguyen Duc Anh
Vietnam Academy of Military Science and Technology, VietNam
O-07
11:35 – 11:50
THEORETICAL INVESTIGATION OF SOLITON PULSE
PROPAGATION INSIDE ADD-DROP MOBIUS MICRORING
RESONATOR
Ahmad Fakhurrazi Ahmad Noorden, Mahdi Bahadoran,
Azam Mohamad, Jalil Ali, Preecha Yupapin
Universiti Teknology Malaysia(UTM)
O-08
11:50 - 12:05
AN ALGEBRAIC COMBINATORIAL APPROACH TO THE STUDY OF
THE NONLINEAR SCHRÖDINGER EQUATION
ON A TORUS
Nguyen Bich Van
Institute of Mathematics, Vietnam Academy of Science and Technology
O-09
12:05 – 12:20
PREPARATION OF Au-Ag ALLOY NANOPARTICLES IN LIQUIDS
BY LASER
Trong Duc Tran, The Binh Nguyen, Quang Dong Nguyen,
Thu Hanh Nguyen Thi, Thanh Hang Nguyen Thi
Department of Physics, University of science, VNU HN
12:20 – 13:30
LUNCH
REPORT SESSION
Chairperson: Prof. Thao Sokunthea (RUPP)
Prof. Pham Van Hoi (VAST)
O-10
13:30 – 13:55
WHAT CAN CATALYSTS DO FOR LIVING THINGS?
(Invited talk)
Wan Azelee Wan Abu Bakar, Rusmidah Ali, Razali Ismail,
Susilawati Toemen and Wan Nur Aini Wan Mokhtar
Universiti Teknologi Malaysia
O-11
13:55 – 14:10
AN ALGORITHM FOR DETERMINING THE NAVIGATION
7
PARAMETERS OF AUVs BASED ON THE COMBINATION OF
MEASURING DEVICES
Thuan Tran Đuc, Lai Phan Tuong, Vinh Nguyen Quang,
Ngoc My Bui, Trung Truong Duy
Academy of Military Science and Technology, VietNam
O-12
14:10-14:25
DEVELOPMENT OF TOOLS TO CHARACTERIZE SPATIAL
FUNCTION IN NEURONAL DIFFERENTIATION AND INFERTILITY
Le Thi Khanh, Catherine Nguyen
UMR 1090- TAGC Inserm, 163, Avenue de Luminy,
13288, Marseille cedex 9, France.
O-13
14:25-14:40
THE PHOTOLUMINESCNECE CHARACTERISTICS OF Eu3+
DOPED LITHIUM TELLURITE GLASS
Siti Aishah Jupri*, Md. Rahim Sahar
Universiti Teknologi Malaysia
O-14
14:40-14:55
FRACTION AND PURIFICATION OF ANTIOXIDANT
PHLOROTANNIN FROM BROWN ALGAE SARGASSUM
SERRATUM VIET NAM
Dang Xuan Cuong, Bui Minh Ly, Vu Ngoc Boi, Tran Thi Thanh Van
Nha Trang Institute of Technology Application and Research, Viet Nam
O-15
14:55-15:10
GAS PHASE MONITORING IN VHF-PECVD PROCESS OF SiC
DEPOSITION USING OPTICAL EMISSION SPECTROSCOPY
Nursyahirah Mustapha and Raja Kamarulzaman Raja Ibrahim
Universiti Teknologi Malaysia
15:10-15:30
COFFEE BREAK
REPORT SESSION
Chairperson: Prof. Hin Sam Ath (PPIU, Cambodia)
Prof. Nguyen Xuan Nghia (IMS, VAST)
O-16
15:30-15:45
DESIGN PARAMETERS CONSIDERATIONS OF A CYLINDER 8
INNER - CONE BLACKBODY SIMULATOR CAVITY BASED ON
ABSORPTION OF REFLECTED RADIATION MODEL
Nguyen Quang Minh and Ta Van Tuan
Center for System Engineering and Integration (CSEI) - National Center for
Technological Progress (NACENTECH) – Vietnam
O-17
15:45-16:00
MAGNETIC ACTIVATED CARBON FROM PALM KERNEL SHELLS
FOR ARSENIC REMOVAL FROM WATER
Nur Asilayan Mohd Asri, Zaiton Abd. Majid and Jafariah Jaafar
Universiti Teknologi Malaysia
O-18
16:00-16:15
STUDY OF STABILITY PARAMETERS PHYSICAL EMITTED BEAM
FROM MACHINE RADIOTHERAPY ACCELERATOR
Nguyen Dang Nhuan, Pham Van Khac
Oncology center -Thai Nguyen general center hospital, VietNam
16:15-17:00
POSTER I
Chairperson: Prof. Thao Sokunthea (RUPP)
Prof. Ho Quang Quy (Vietnam)
Dr. Vu Duong (IOP, VAST)
18:00
WELCOME PARTY
(offered by Royal University of Phnom Penh)
9
POSTER I
P-01
APPLICATION OF LOW POWER SEMICONDUCTOR LASER IN
VARICOSE VEINS TREATMENT
Tran Minh Thai, Ngo Thi Thien Hoa, Tran Thi Ngoc Dung,
Tran Thi Lien Minh, Can Van Be
University of Technology, Vietnam National University – Ho Chi Minh City
P-02
OPTICAL PROPERTIES OF CdSe QUANTUM DOTS PREPARED BY
WET CHEMICAL METHOD USING CITRATE
Chu Viet Ha*, Tran Anh Duc, Nguyen Thi Van, Vu Thi Kim Lien
Thai Nguyen University of Education, Thai Nguyen,
Institute of Physics, VAST, Hanoi, Vietnam
P-03
APPLICATION OF WAVELET TRANSFORMS FOR NON
DIRECTIONAL BEACON SYSTEM
Mai Thanh Phong, Phan Thanh Vu, Duong Thi Cam Tu,
Nguyen Thanh Dung
University of Technical Education of Ho Chi Minh City;
Vietnam Aviation Academy
P-04
APPYING THE COLEGRAM SOFTWARE TO THE ANALYSIS OF
RADIATION SPECTRA
Nguyen Thi Minh Sang
University of DaLat, VietNam
P-05
CALIBRATION AGAINST ORIENTATION DRIFT IN A REAL TIME
EMBEDDED INERTIAL MEASUREMENT UNIT
Bui Hong Hue, Tran Xuan Kien, Do Duc Hanh, Doan Minh Dinh
Military Technical Academy, Hanoi, Vietnam
P-06
CARBON NANOTUBE BASED ADDITIVES FOR MINERAL OILS
Ha Quoc Bang, Tran Son Hai, Nguyen The Nghiem,
Nguyen Manh Tuong, Nguyen Tran Hung
Institute of Chemistry and Materials Science,
Military Institute of Science and Technology, VietNam
P-07
APPLICATION OF LOW POWER SEMICONDUCTOR LASER FOR
REHABILITATION OF LIVER FUNCTION DAMAGED BY DRUG
ADDICTION
Tran Thien Hau, Tran Dinh Hop, Tran Thi Ngoc Dung, Tran Minh Thai
University of Technology, Vietnam National University –Ho Chi Minh City
10
P-08
DIELECTRIC AND NONLINEAR CURRENT - VOLTAGE
CHARACTERISTICS OF La - DOPED BiFeO3 CERAMICS
Benjaporn Yotburut*, Teerapon Yamwong and Santi Maensiri
Institute of Science Suranaree University of Technology, Thailand
P-09
CLONING, EXPRESSION AND PURIFICATION OF GENE
ENCODING L-ASPARAGINASE IN PICHIA PASTORIS GS115
Do Thi Tuyen, Nguyen Tien Cuong, Nguyen Thi Hien Trang,
Quyen Dinh Thi
Institute Biotechnology, Vietnam Academy of Science and Technology
P-10
CONTROL OF THE OPTICAL PROPERTIES OF COLLOIDAL
ZnCdS NANOCRYSTALS BY VARYING THE MONOMER AND
STEARIC ACID CONCENTRATIONS IN OCTADECENE
Hoang Thi Lan Huong, Nguyen Anh Tu, Pham Minh Kien,
Nguyen Thi Thuy Lieu, Nguyen Xuan Nghia
Hanoi University of Science,Viet Nam
P-11
CONTROLLING THE DEVICES VIA BLUETOOTH USING THE
ANDROID OPERATING SYSTEM
Duong Thi Cam Tu, Pham Duy Thanh, Hoang Ngoc Minh,
Phan Thanh Vu, Mai Thanh Phong, Nguyen Thanh Dung
University of Technical Education of Ho Chi Minh City, Vietnam
P-12
DATA BASES FOR SYNTHESIS OF CATALYSTS FOR THE
PREPARATION CARBON NANOTUBES BY WET COMBUSTION
METHOD
Tran Van Hien, Nguyen Manh Tuong, Nguyen The Nghiem,
Nguyen Dinh Ha
Institute of Chemistry-Material; Institute Number 78, VietNam
P-13
ISOLATION
AND
CHARACTERIZATION
OF
MERINE
ATINOMYCETES
HP411
AND
ITS
POTENTIAL
IN
ANTIBACTERIAL AND ANTICANCER ACTIVITY
Pham T. Huyen*, Le G. Hy, Phi Q. Tien, Ho Tuyen, Bach T. M. Hoa,
Vu T. H. Nguyen, Dang T.T. Duong, Quach N. Tung, Nguyen P. Nhue
Institute of Biotechnology, Vietnam Academy of Science and Technology
P-14
ELECTROMAGNETICALLY INDUCED TRANSPARENCY IN FIVELEVEL CASCADE SCHEME OF 85Rb ATOMS: AN ANALYTICAL
APPROACH
Pham Van Trong, Nguyen Manh An, Le Van Doai, Dinh Xuan Khoa,
Nguyen Huy Bang
Vinh University, Viet Nam
11
P-15
EXPRESSION OF L-ASPARAGINASE GENE IN ESCHERICHIA
COLI
Thi Hien Trang Nguyen, Thi Tuyen Do, Dinh Thi Quyen
Institute Biotechnology, Vietnam Academy of Science and Technology
P-16
FABRICATION OF ALIGNED AMORPHOUS SILICON CARBIDE
NANOROD ARRAYS BY ELECTROCHEMICAL ETCHING
Cao Tuan Anh, Luong Truc Quynh Ngan, Dao Tran Cao
Institute of Physic & Institute of Materials Science, VAST; Vietnam
P-17
FEASIBILITY STUDY OF g-g COINCIDENCE SPECTROMETER
FOR NEUTRON ACTIVATION ANALYSIS AT DALAT REAEARCH
REACTOR
P.D. Khang, T.V. Minh, N. X. Hai, P.N. Son, H.H. Thang
Nuclear training center, Hanoi, Vietnam
P-18
STUDY ON THE METHOD OF LIDAR DATA PROCESSING
Bui Thi Thanh Lan
Faculty of Basics Science, University of Mining and Geology, Viet Nam
P-19
Ge/HfO2 INTERFACE PASSIVATION BY SILICON
Nguyen Hoang Thoan, V. V. Afanas’ev and A. Stesmans
Hanoi University of Science and Technology, Ha noi; Viet Nam
University of Leuven (KU Leuven), Belgium
P-20
INFLUENCE OF INPUT PULSE ON THE COMPRESSION
EFFICIENCY OF THE SELF - COMPRESSOR CONSISTING OF
NONLINEAR COUPLER AND BACKWARD-PUMPED RAMAN
FIBER AMPLIFIER
Nguyen Manh An, Chu Van Bien, Hoang Dinh Hai, Ho Quang Quy
Hongduc University, ThanhHoa City, Viet Nam
Vietnamese Academiy of Science and Technology
P-21
COMPLETE GROUP CLASSIFICATION OF SYSTEMS OF TWO
LINEAR SECOND-ORDER ORDINARY DIFFERENTIAL
EQUATIONS
G.F. Oguis*, S. Moyo, S.V. Meleshko
Institute of Science, Suranaree University of Technology, Thailand
P-22
NEW CARPAL TUNNEL SYNDROME TREATMENT METHOD:
THE APPLICATION OF LOW POWER SEMICONDUCTOR LASER
Dinh Thi Thu Hong, Nguyen Thi Kim Yen, Tran Minh Thai
University of Technology, Vietnam National University – Ho Chi Minh City
12
P-23
OPTICAL PROPERTIES OF ERBIUM DOPED Sr6B5PO20 PHOSPHOR
POWDERS PREPARED VIA CO-PRECIPITATION METHOD
L. T. Ha, N. D. T. Kien, P. T. Huy
Advanced Institute for Science and Technology (AIST),
Hanoi University of Technology (HUST), Viet Nam
P-24
OPTICAL PROPERTIES OF NANOPARTICLEDOPED SOLIDSTATE
DYE LASER MEDIUM
Nguyen Thi My An, Vu Duong, NghiemThi Ha Lien,
Do QuangHoa, Vu Thanh Thuy
Institute of Physics, VAST. Ha noi, VietNam
P-25
DEPENDENCE OF LIGHT REFLECTION SPECTROCOPY ON
MAGNETIC FIELD AND FERROMAGNETIC COMPONENT IN CoAg GRANULAR MAGNETIC FILMS
Giap Van Cuong, Nguyen Anh Tuan, Nguyen The Binh, Tran Trung
Hanoi University of Science and Technology; Vietnam
P-26
PREPARATION OF PLATIN NANOPARTICLES IN SOME LIQUIDS
BY LASER ABLATION
Quang Dong Nguyen, The Binh Nguyen, Trong Duc Tran,
Trinh Nguyen Thi, Thu Hanh Nguyen Thi, Thanh Hang Nguyen Thi
Thai Nguyen University of medicine and pharmacy, TNU;
Department of Physics, University of science, VNU HN
P-27
PROPAGATION OF THE DIFFERENT WAVELENGTH LOW
POWER SEMICONDUCTOR LASER FROM THE BACK SKIN TO
THE LUNG: A MONTE CARLO SIMULATION STUDY
Mai Huu Xuan, Tran Thi Ngoc Hieu, Mai Le Minh, Tran Minh Thai
University of Technology, Vietnam National University – Ho Chi Minh City
P-28
SYNTHESIS OF rGO/Ag NANOCOMPOSITESVIA CHEMICAL
REDUCTION OF EXFOLIATED GRAPHITE OXIDE
I.Kotutha *, E. Sawatsitang 2 and S.Maensiri
Institute of Science Suranaree University of Technology, Thailand
P-29
RESEACH ON THE FLUENCE OF PARTICLE SIZE TRISUNFUA
ANTIMONY ON THE KALIPERCLORAT-LEADCROMATNITROXENLULO PYROTECHNIC SYSTEM
Doan Anh Phan, Ngo Van Giao and Tran Minh Cong
Chemical Institute, Academy of Science and Technology Army;
Institute of Propellant and Explosive
P-30
FIRST PRINCIPLES STUDY OF OXYGEN SUBSTITUTIONAL
DEFECT IN GROUP III NITRIDES
13
Nirawith Palakawong, Jiraroj T-Thienprasert, Sukit Limpijumnong
Institute of Science Suranaree University of Technology, Thailand
P-31
STUDYING GAMMA CASCADE DECAY OF 59Ni ON THERMAL
NEUTRON REACTION
Nguyen An Son, Pham Dinh Khang, Nguyen Duc Hoa, Nguyen Xuan Hai,
Nguyen Thi Minh Sang
University of Dalat, Lam Dong, Vietnam;
Vietnam Atomic Energy Institute,
P-32
CHARACTERISTICS OF Mo-Au AND Cu MINERALIZATION IN
PHA KIENG-NAM BO AREA, MUANG LONG, LAO PDR
Khoanta Vorlabood, Tran Thanh Hai, Tran Binh Chu
Hanoi University of Mining and Geology, Tu Liem, Hanoi, Vietnam
P-33
THE EFFECTIVE DIFFUSIVITIES OF BORON AND POINT
DEFECTS IN SILICON
Vu Ba Dung, Dinh Van Thien, Vu Dung Le and Dao Thi Trang
Hanoi University of Mining and Geology, Viet Nam
Hanoi National University of Education, Viet Nam
P-34
ELASTIC PARAMETERS OF PbTiO3 FROM FIRST PRINCIPLES
CALCULATIONS
Narasak Pandech*, Kanoknan Sarasamak and Sukit Limpijumnong
Institute of Science Suranaree University of Technology, Thailand
P-35
THE RESPONSE OF MUON-INDUCED BACKGROUND ON HPGE
AND PLASTIC SCINTILLATION DETECTORS IN COINSIDENCE
BY GEANT4 SIMULATION
Nguyen Quoc Hung, Vo Hong Hai, Do Minh, Nguyen Ngoc Lam
University of Science-VNU-HCM; University of Science-VNU-HCM
P-36
THE STUDY OF SINGLE-ELECTRON TRANSISTOR VIA THE
SIMULATION OF CURRENT-VOLTAGE CHARACTERISTICS BY
USING NON- EQUILIBRIUM GREEN FUNCTION METHOD
Le Hoang Minh
University of Technical Education of Ho Chi Minh City
P-37
EVALUATION OF EFFECTIVE EMISSIVITY OF A CYLINDER INNER - CONE BLACKBODY SIMULATOR CAVITY
Nguyen Quang Minh and Ta Van Tuan
Center for System Engineering and Integration (CSEI) National Center for Technological Progress (NACENTECH) – Vietnam
14
P-38
COMPLETE GROUP CLASSIFICATION OF THE EQUATION FOR
GENERATING FUNCTION OF THE BOLTZMANN EQUATION
WITH SOURCES
Amornrat Suriyawichitseranee*, Yurii N. Grigoriev, Sergey V. Meleshko
Institute of Science, Suranaree University of Technology, Thailand
P-39
THERMAL DECOMPOSITION STUDIES ON CAST MIXTURE OF
TNT AND RDX
Nguyen Mau Vuong, Ngo Van Giao
Chemical Institute, Academy of Science and Technology Army;
Institute of Propellant and Explosive
P-40
USING MODIS IMAGES TO DETERMINE THE SALINITY OF THE
SOIL IN NAM DINH PROVINCE
Nguyen Dinh Tai
Center for Environmental Physics, Institute of Physics, VAST
P-41
RETRIEVALS OF AEROSOL OPTICAL DEPTH FROM MODIS
IMAGERY AND VALIDATION WITH AERONET DATA
Nguyen Dinh Tai
Institute of Physics, Hanoi, Viet Nam
P-42
TUNNELING CONDUCTANCE OF A METAL AND A TWODIMENSIONAL ELECTRON GAS WITH RASHBA AND
DRESSELHAUS SPIN - ORBIT COUPLING
A. Ka-oey*, P. Pairor
Institute of Science, Suranaree University of Technology, Thailand
P-43
EFFECT OF DENSITY AND SIZE OF THE SILVER
NANOPARTICLES, WHICH WERE DEPOSITED ONTO
THE SiNW ARRAYS, ON THE SERS MEASUREMENTS
Luong Truc Quynh Ngan, Dao Tran Cao, Cao Tuan Anh,
Nguyen Nhu Duong
Institute of Materials Science;
Institute of Physics; Hanoi University of Science, Viet Nam
15
Wednesday – November 13, 2013
REPORT SESSION
Chairperson: Dr. Tieng Siteng (RUPP)
Prof. Roberto Coisson (Parma, Italy)
O-19
08:00-08:25
CHARACTERIZATION OF NANOSTRUCTURED MATERIALS
AND NANODEVICES
(Invited talk)
Ramdane BENFERHAT
HORIBA Scientific
O-20
08:25-08:50
RESEARCH AND DEVELOPMENT OF THE 1D MODEL FOR
THE WIRELESS POWER TRANSMISSION PROBLEM USING
MICROWAVE BEAM FROM GEO TOTHE EARTH
(Invited talk)
Phan Anh Tuan and Dao Khac An
Institute of Materials Science, VAST
O-21
08:50-09:05
ANTIMICROBIAL ACTIVITY OF RED AND VIOLET
PIGMENTS FROM LOCALLY ISOLATED BACTERIAL
STRAINS
Claira Arul Aruldass, Ponnusamy Yasodha, Surash Ramanathan,
Wan Azlina Ahmad
Universiti Teknologi Malaysia
O-22
09:05-09:20
DETERMINATION OF AERODYNAMIC CHARACTERISTICS
OF FLYING VEHICLES USING METHOD OF LARGE EDDY
SIMULATION WITH ANSYS.CFX
Le Tuan Anh, Phan Tuong Lai, Nguyen Thanh Binh
Vietnam Academy of Military Science and Technology
O-23
09:20-09:35
ZINC OXIDE NANOWIRES SYNTHESIZED BY THEMAL
EVAPORATION METHOD WITH AND WITHOUT CATALYST
Syahida Suhaimi, Samsudi Sakrani, Tashi Dorji, Peshawar O. Amin
16
Universiti Teknologi Malaysia
O-24
09:35-09:50
STUDY ON EXTRACTION AND PURIFICATION OF LONG
CHAIN POLYUNSATURATED FATTY ACIDS FROM
HETEROTROPHIC MARINE MICROALGA
SCHIZOCHYTRIUM MANGROVEI PQ6
Dinh Thi Ngoc Mai, Le Thi Thom, Nguyen Cam Ha, Luu Thi Tam,
Hoang Thi Lan Anh, Ngo Thi Hoai Thu, Hoang Thi Minh Hien,
Dang Diem Hong
Institute of Biotechnology, Vietnam Academy Science and Technology
O-25
09:50-10:10
FORMATION OF COPPER NANOPARTICLE FROM
ELECTRODIC REACTION BY HIGH VOLTAGE
Nguyen Duc Hung, Nguyen Thanh Hai, Bui Ngoc Duong,
Vo Thanh Vinh
Institute for Materials and Chemistry, VAST
10:10-10:30
COFFEE BREAK
REPORT SESSION
Chairperson: Prof. Uk On Norong (RUPP)
Prof. Dao Tran Cao ( VAST)
O-26
10:30-10:45
THE LUMINESCENCE OF Er3+/Nd3+
LITHIUM NIOBATE TELLURITE GLASS
CODOPED
WITH
Nurhafizah H., Rohani M.S., Sahar M.R., Ghoshal S.K.
Universiti Teknologi Malaysia
O-27
10:45-11:00
EFFECT OF BICARBONATE CONCENTRATION ON
ASTAXANTHIN ACCUMULATION OF GREEN MICROALGA
HAEMATOCOCCUS PLUVIALIS
Luu Thi Tam, Dinh Thi Ngoc Mai, Hoang Thi Lan Anh,
Ngo Thi Hoai Thu, Hoang Thi Minh Hien, Dang Diem Hong
Institute of Biotechnology, Vietnam Academy of Science and Technology
17
O-28
11:00-11:15
Mo/Al2O3 CATALYSTSIN OXIDATIVE DESULFURIZATION OF
DIESEL FUEL WITH TBHP-DMF SYSTEM
Wan Nazwanie Wan Abdullah*, Wan Azelee Wan Abu Bakar
Rusmidah Ali
Universiti Teknologi Malaysia
O-29
11:15-11:30
ISOLATION AND SCREENING OF MARINE AZOTOBACTER
SP FROM MARINE VIETNAM REGION BY THEIR
BIOLOGICAL NITROGEN FIXATON POTENTIAL
Tran Nguyen Ha Vy, Cao Thi Thuy Hang, Tran Thi Thanh Van and
Bui Minh Ly
Nha Trang Institute of Technology Research and Application, Viet Nam
O-30
11:30-11:45
SYNTHESIS OF Fe3O4@SiO2@Au CORE-SHELL-SHELL
STRUCTURE
Nguyen Thi Thuy*, Tran Anh Duc, Vu Van Son,
Nghiem Thi Ha Lien, Tran Hong Nhung
IOP, Vietnam Academy of Science and Technology
O-31
11:45-12:00
HEAT SENSOR USING SOLITON PULSE IN PANDA RING
RESONATOR
Azam Mohamad, Ahmad Fakhrurrazi Noorden, Mahdi Bahadoran,
Jalil Ali, and Preecha Yupapin
Universiti Teknologi Malaysia
O-32
12:00-12:15
SYNTHESIS OF ZnO NANORODS IN PBS SOLUTION, THEIR
MORPHOLOGICAL AND OPTICAL CHARACTERIZATION
K. Khun, Z. H. Ibupoto, S. Chen, W. M. Chen,
I. A. Buyanova, M. Willander
Royal University of Phnom Penh
12:15-13:30
LUNCH
18
REPORT SESSION
Chairperson: Dr. Seam Ngonn (RUPP)
Prof. Wan Azelee Wan Abu Bakar (Malaysia)
O-33
13:30-13:55
THE CAPACITY OF SHEET PILE SHALLOW FOUNDATION
UNDER VERTICAL AND ECCENTRICITY LOADING ON
CLAY
(Invited talk)
Chamroeun Chhun*, Pongsakorn Punrattanasin
Department of Civil Engineering, KhonKaen University, Thailand
O-34
13:55-14:20
HIGH-SPEED CAMERA AND CALCULATING VELOCITIES IN
EXCEL BY USING LEAST SQUARES FITTING
(Invited talk)
Pech Ouksaphea, Kato Tetsuya
Royal University of Phnom Penh
O-35
14:20-14:35
O-36
14:35-14:50
O-37
14:50-15:05
BASIC CATALYST WITH AMMONIATED
POLYETHYLENE GLYCOL: A NEW TECHNOLOGY TO
REMOVE NAPHTHENIC ACID FROM PETROLEUM
CRUDE OIL
Nurasmat Mohd Shukri*, Jafariah Jaafar, Wan Azelee Wan Abu
Bakar and Zaiton Abd. Majid
UniversitiTeknologi Malaysia
SQUALENE EXTRACTED AND PURIFIED FROM
HETEROTROPHIC MARINE MICROALGA Schizochytrium
mangrovei FOR THE FUNCTIONAL FOOD APPLICATION
Le Thi Thom, Nguyen Cam Ha, Dinh Thi Ngoc Mai, Hoang Thi Minh
Hien, Hoang Thi Lan Anh, Ngo Thi Hoai Thu, Dang Diem Hong
Institute of Biotechnology, Vietnam Academy of Science and Technology
MEASUREMENT OF TOTAL CROSS SECTIONS OF CARBON
AND URAN ON FILTERED NEUTRONS BEAMS OF 54 keV
AND 148 keV AT DALAT RESEARCH REACTOR
T. T. Anh, P. N. Son, V. H. Tan, P. D. Khang
Nuclear Research Institute, Dalat, Vietnam
19
O-38
15:05-15:20
PHOTOLUMINESCENCE BIOSENSOR BASED ON CdZnSe/ZnS
TERNARY ALLOY QUANTUM DOTS FOR PESTICIDE
DETECTION
Nguyen Ngoc Hai, Nguyen Hai Yen, Duong Thi Giang,
Dinh Hung Cuong, Nguyen Duc Nhat, Pham Thu Nga, Dao Tran Cao
Institute of Materials Science, VAST
15:20-15:30
COFFEE BREAK
REPORT SESSION
Chairperson: Prof. Hin Sam Ath (PPIU, Cambodia)
Prof. Dang Diem Hong (VAST)
O-39
15:30-15:45
NON THERMAL PLASMA TECHNOLOGY IN WATER
TREATMENT APPLICATION
Nur Zazwani Rosdi *, Dr. Raja Kamarulzaman Raja Ibrahim
Universiti Teknologi Malaysia
O-40
15:45-16:00
EIT ENHANCED KERR NONLINEARITY IN THE FIVE-LEVEL
SCHEME OF COLD 85Rb ATOMIC VAPOUR
Le Van Doai, Nguyen Manh An, Dinh Xuan Khoa, Nguyen Huy Bang
Vinh University, Viet Nam
O-41
16:00-16:15
THE CdS/CdSe/ZnS PHOTOANODE CO-SENSITIZED SOLAR
CELLS BASED-ON Pt, CuS, Cu2S, PbS COUNTER
ELECTRODES
Thanh Tung Ha, Thanh Nguyen Nguyen, Quang Vinh Lam,
Thai Hoang Nguyen, Thanh Dat Huynh
Dong Thap University, Vietnam
16:15-17:00
POSTER II
Chairperson: Prof. Rattikorn Yimnirun (Thailand)
Ms. Chea Eliyan (RUPP)
Dr. Do Hoang Tung (IOP, VN)
20
POSTER II
P-44
CLONING AND EXPRESSION OF A GENE ENCODING
CHITINASE FROM LECANICILLIUM LECANII 43H IN
PICHIA PASTORIS
Nguyen Huu Quan, Vu Van Hanh, Quyen Dinh Thi
Institute of Biotechnology, VAST
P-45
RECENT RESULT FROM THE CLINICAL TREATMENT
OF VARICOSE VEINS USING LOW POWER
SEMICONDUCTOR LASER
Tran Minh Thai, Ngo Thi Thien Hoa, Can Van Be,
Tran Thi Lien Minh
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
P-46
LOCAL STRUCTURE OF CA DOPANT IN BaTiO3 - (Bi 0.5Na0.5)TiO3
SYSTEM BY CA K - EDGE X-RAY ABSORPTION NEAR-EDGE
STRUCTURE AND FIRST - PRINCIPLES CALCULATIONS
Ittipon Fongkaew *, Sukit Limpijumnong, Jiraroj T-Thienprasert
Institute of Science Suranaree University of Technology, Thailand
P-47
SYNTHESIS AND PROPERTIES OF THERMALLY
DECOMPOSED Tb-DOPED ZnO NANORODS
K. Noipa*, S. Rujirawat, R. Yimnirun, V. Promarak, S. Maensiri
Institute of Science Suranaree University of Technology, Thailand
P-48
THE POSITRON – ELECTRON ANNIHILATION IN ZnO: THE
SLATER – TYPE ORBITALS, MODIFIED JASTROW AND
VARIATIONAL QUANTUM MONTE CARLO METHOD
Trinh Hoa Lang, Chau Van Tao, Huynh Ngoc Tram
Faculty of Physics and Engineering Physics, Viet Nam
University of Science –HCM city, Viet Nam
P-49
DIELECTRIC PROPERTIES OF TITANATE NANOTUBES
PREPARED BY HYDROTHERMAL ROUTE
Pristanuch Kasian *, Saroj Rujirawat, Rattikorn Yimnirun,
Teerapon Yamwong and Santi Maensiri
Institute of Science Suranaree University of Technology, Thailand
P-50
THE INFLUENCE OF HIGH FIELD INSERTION DEVICES ON
THE BEAM DYNAMICS OF SPS STORAGE RING
21
S.Krainara*, P. Sudmuang, S.Maensiri, S.Rugmai,
P.Klysubun, A.Tong-on
Institute of Science Suranaree University of Technology, Thailand
P-51
ELEMENTAL ANALYSIS OF INDIUM TIN OXIDE BY
SYNCHROTRON XRF
C. Songsiriritthigul, T. Saisopa, M. Phanak, N. Mothong,
N. Yachum, S. Chidchob, N. Sumano, P. Songsiriritthigul*
Institute of Science Suranaree University of Technology, Thailand
P-52
HIGH PRESSURE PHASE OF LiGaO2: FIRST PRINCIPLES
CALCULATIONS
Wutthigrai Sailuam*, Kanoknan Sarasamak, Sukit Limpijumnong
Institute of Science Suranaree University of Technology, Thailand
P-53
STUDYING AVERAGE (n, p) CROSS SECTION OF Fe AND Ti
BY NEUTRON ACTIVATION USING Am-Be SOURCE
Nguyen Vu Minh,Nguyen Anh Khoa, Luu Dang Hoang Oanh,
Huynh Truc Phuong, Nguyen Thi Quy
University of Science-Ho Chi Minh city; Viet Nam
University of Education-Ho Chi Minh city, Viet Nam
P-54
FABRICATION AND CHARACTERIZATION OF C/ZnFe2O4
COMPOSITE NANOFIBERS BY ELECTROSPINNING
S. Nilmoung*, R. Yimnirun, S. Rujirawat, S. Maensiri
Institute of Science Suranaree University of Technology, Thailand
P-55
FABRICATION AND CHARACTERIZATION OF Ni NiO/CARBON COMPOSITE NANOFIBERS
Tanayt Sinprachim*, Santi Maensiri
Institute of Science Suranaree University of Technology, Thailand
P-56
FIRST PRINCIPLES CALCULATIONS OF Bi(Mg1/2Ti1/2)O3
CRYSTAL STRUCTURE
Nuchalee Schwertfager*, NarasakPandech,
Malliga Suewattana and Sukit Limpijumnong
School of Physics and NANOTEC-SUT Center of Excellence on Advanced
Functional Nanomaterials, Suranaree University of Technology, Thailand
P-57
A SOLUTION TO OPTIMIZE FLIGHT PROFILES OF FLYING
OBJECTS
Tran Phu Hoanh, Dang Tran Ngoc Chau
VietNam Academy of science and military technology
22
P-58
THE REDISTRIBUTION OF INTENSE GUASSIAN BEAM IN THE
KERR MEIDUM
Hoang Van Nam, Cao Thanh Le, Chu Van Lanh,
Thai Dinh Trung, Ho Quang Quy
Vietnamese Academiy of Science and Technology
P-59
EFFICIENCY FREQUENCY - DOUBLING OF BETA - BARIUM
BORATE (BBO) USING LASER DFB PUMPED BY THE SECOND
HARMONIC OF NANOSECOND LASER Nd: YAG
Le Thi Ly*, Vu Duong, Nguyen Thi My An, Do Quang Hoa
Insitute of Physics, Vietname Academy of Science and Technology
P-60
SYNTHESIS AND OPTICAL CHARACTERIZATION OF SMALL
DIAMETER GOLD NANOSHELLS FOR BIOMEDICAL
APPLICATIONS
Thi Hue Do, Thi Thuy Nguyen, Thi Ha Lien Nghiem, Hong Nhung Tran
Insitute of Physics, Vietname Academy of Science and Technology
P-61
SYNTHESIS OF FLUORESCENCE SiO2 NANOPARTICLES WITH
CdTe QUANTUM DOTS BY MODIFIED STӦBER METHOD
T.H.Nga Nguyen, T.B.Ngoc Nguyen, V.H.Chu,
T.H.Lien Nghiem, T.D.Thuy Ung and H. Nhung Tran
Insitute of Physics, Vietname Academy of Science and Technology
P-62
PHOTOTHERMAL EFFECT IN THE NEAR-INFRARED REGION
BY USING GOLD NANOPARTICLES
Vu Thi Thuy Duong*, Trinh Thi Thuong, Nghiem Thi Ha Lien,
Do Quang Hoa and Tran Hong Nhung
Institute of Physics, Vietname Academy of Science and Technology
P-63
ASSESSMENT OF THE BACTERICIDAL ACTIVITIES OF
LIGOHEXAMETHYLENE GUANIDINE HYDROCLORIDE BASE
ON THE WASTEWATER TREATMENTING OF TO LICH RIVER
Nguyen Viet Hung*, Nguyen Viet Bac, Tran Van Chung,
Vo Hoang Phuong, Nguyen Thu Huong
P-64
Institute of Material and Chemistry, Academy of Science and Technology
Army, Viet Nam
COMPARABLE CONDITIONS FOR HETEROLOGOUS
EXPRESION OF ENDOCHITOSANASE OF BACILLUS CEREUS
HN90 IN ESCHERICHIA COLI AND PICHIA PASTORIS
Nguyen Thi Ngoc Lien, Vu Van Loi, Ngoc Nghiem Minh,
Phi Quyet Tien
Institute of Biotechnology, Vietnam Academy of Science and Technology.
23
P-65
NEW INSIGHT INTO THE KINETIC FORMATION OF HIGH-TC
GeMn NANOCOLUMNS
Le Thi Giang*, Nguyen Manh An, Nguyen Van Hoa, Le Thanh Vinh
Hong Duc University, Thanh Hoa, Vietnam
P-66
THE EFFECTS OF MANGANESE CONCENTRATION ON
STRUCTURAL AND MAGNETIC PROPERTIES OF MnGe
DILUTED MAGNETIC SEMICONDUCTORS
Le Thi Giang*, Nguyen Manh An, Nguyen Van Hoa, Le Thanh Vinh
Hong Duc University, Thanh Hoa, Vietnam
P-67
SOME RESEARCH RESULTS ON ADHESIVE BASED EPOXY
MODIFIED BY a, w-BIS(METHACRYLOYLOXY) OLIGOMER
(TRIETHYLENE GLYCOL PHTHALATE)
Ho Ngoc Minh*, Do Dinh Trung, Do Quoc Manh
Institute of Chemistry and Materials science, Academy of Military Science
and Technology, VietNam
P-68
COMBINED ZERO –VALENT IRON AND A2O BIOFILM system
PROCESSES TREATMENT OF TNT INdUSTRY WASTEWATER
Vu Duy Nhan*, Nguyen Thi Nhan, Do Vinh Truong, Le Duc Anh,
Vu Van Dung, Le Minh Tri, Doan Thanh Huyen, Tran Thi Nguyet,
Do Binh Minh, Luu Viet Hung
Institute of Chemisty and Materials, Academy of Military Science and
Technology, Ministy of Defence, Vietnam
P-69
RECEIVED RESULTS OF MANUFACTURING AND
INVESTIGATED STRUCTURES, THERMODYNAMIC
PROPERTIES OF NITRILE RUBBER-NANOCLAY COMPOSITES
Do Quoc Manh
Institute of Chemistry and Materials science, Ha noi,Viet Nam
P-70
THE TREATMENT FOR VARIOUS TYPES OF BONE FRACTURE:
THE APPLICATION OF LOW POWER SEMICONDUCTOR
LASER
Trinh Tran Hong Duyen, Phan Van To Ni, Nguyen Tuan Kha,
Tran Thi Ngoc Dung, Tran Minh Thai
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
P-71
MONITORING THE BOUNDARY LAYER OVER HANOI USING
COMPACT LIDAR SYSTEM
Bui Van Hai, Dinh Van Trung, Nguyen Xuan Tuan, Dam Trung Thong
and Nguyen Dinh Hoang
Institute of physics; Vietnamese Academiy of Science and Technology
24
P-72
CALCULATE AND OPTIMIZE THE DENSITY OF IONS Er3+
AND IONS Yb3+ IN THE ACTIVE MEDIUM OF ERBIUMGLASS LASER CONSISTENT WITH THE LABORATORY
CONDITIONS IN VIETNAM
Trinh Đinh Chien, Giang Manh Hung
Hanoi University of Science – VNU
Hà Nội – Amsterdam High school, Ha Noi, Viet Nam.
P-73
THE LOCAL STRUCTURE AND EVOLUTION OF RELAXOR
BEHAVIOR IN BaTiO3 - Bi(Zn 0.5 Ti 0.5)O3 CERAMICS
Atipong Bootchanont, Saroj Rujirawat, Rattikorn Yimnirun,
Ruyan Guo, Amar Bhalla
Institute of Science, Suranaree University of Technology and COENANOTEC-SUT on Advanced Functional Nanomaterials, Thailand
P-74
APPLICATION OF WAVELET TRANSFORM FOR LOCALIZER
STATION IN INSTRUMENT LANDING SYSTEM
Phan Thanh Vu, Mai Thanh Phong, Duong Thi Cam Tu,
Nguyen Thanh Dung
University of Technical Education of Ho Chi Minh City;
Vietnam Aviation Academy
P-75
FLUORESCENT PROPERTIES OF CANCEROUS LIVER TISSUE
Nguyen Thi Khanh Van, Nguyen Dinh Hoang, Nguyen Cong Thanh,
Nguyen Thanh Binh, Nguyen Quoc Khanh
Institute of Physics, Vietnam Academy of Science and Technology
P-76
MASS SPECTROMETRY INVESTIGATION OF PLASMA
CHEMISTRY IN PLASMA ENHANCE CHEMICAL VAPOR
DEPOSITION DISCHARGES
The Anh Nguyen, Van Kha Nguyen, Mike Froehlich,
Hoang Tung Do* and Holger Kersten
Insitute of Physics, Vietname Academy of Science and Technology
P-77
TREATMENT OF HYPERTENSION AND CEREBRAL
HEMORRHAGE BY LOW-POWER LASER INTRAVASCULAR
METHOD IN THAI NGUYEN PROVINCIAL HOSPITALE
Van Thien Bui, Van Toan Hoang, Thi Nga Le,
Le Xuan Thuy, Pham Van Hoi
Thai Nguyen University of Medicine and Pharmacy
25
P-78
CURRENT TRENDS OFEXPLOSIVE RESIDUE ANALYSIS IN THE
ASIAN REGION
MohamadAfiqMohamedHuri, UmiKalthomAhmad, Mustafa Omar
Universiti Teknologi Malaysia
P-79
REASEARCH ON THE ENGINEERING OF THE SOLID STATE
LASER PUMPED BY DIODE LASER
Khoi Giang Manh, Tien Do Xuan, Hieu Pham Chi
Centre for Technology Development and Transfer National Centre for Technology Progress Hanoi, VietNam
P-80
THE EFFECT OF BENIGN PROSTATIC HYPERPLASIA ON
URETHRA AND BLADDER FUNDUS: Insight from Simulation
Tran Minh Thai, Tran Anh Tu, Nguyen Dinh Quang,
Nguyen Minh Chau, Nguyen Dinh Thien Tam, Vo Duy Trung
University of Technology, Vietnam National University – Ho Chi Minh
City.
P-81
DESIGN OF SINGLE-MODE DIODE END-PUMPED SOLIDSTATE Cr:LiSAF LASER CAVITY
Nguyen Van Hao, P. H. Minh, Do Quoc Khanh, Pham Huy Thong
Thai Nguyen University of Science, Vietnam
Insitute of Physics, VAST
P-82
GENERATION OF SHORT LASER PULSES FROM SINGLE MODE DIODE LASER AT 660 nm
Nguyen Van Hao, Dam Trung Thong, Nguyen Dinh Hoang,
Pham Huy Thong and Pham Van Duong
Center for Quantum Electronics, Institute of Physics (VAST), Vietnam
Faculty of Physics & Technology, Thai Nguyen University of Science,
Vietnam
P-83
DESIGN AND DEVELOPMENT OF LASER PULSE STRETCHER
AND COMPRESSOR
Pham Hong Minh, Pham Van Duong, Do Quoc Khanh,
Nguyen Van Hao, Pham Huy Thong, Nguyen Dai Hung
Center for Quantum Electronics, Institute of Physics, VAST
P-84
BORATE-TELLURIDE GLASSES DOPED WITH Dy3+
ION: FLUORESCENCE AND APPLICATIONS
Sengthong Bounyavong 1*, V. X Quang 2, Ho Van Tuyen 2
1
Faculty of Science, National University of Lao, Vientiane, Laos
2
R&D Center, Duy Tan University, Da Nang, Vietnam
26
P-85
LIFE TIME AND DEPHASING TIME OF LYCOPENE
DETERMINED BY SPECTRALLY RESOLVED ONE AND TWOCOLOR FEMTOSECOND PHOTON ECHOES
Vuong Van Cuong, Nguyen Dai Hung, Dao Van Lap
Faculty of Physics, Hanoi National University of Education
Institute of Physics, Vietnam Academy of Science and Technology
Swinburne University of Technology, Melbourne, Australia
27
Thursday – November 14, 2013
REPORT SESSION
Chairperson: Prof. Thao Sokunthea (RUPP)
Prof. Rattikorn Yimnirun (Suranaree Uni.,
Thailand)
O-42
08:00-08:25
EXOPLANETS
(Invited talk)
Ernst van Groningen
International Science Program (ISP), Uppsala University, Sweden.
08:25-08:45
INTERNATIONAL SCIENCE PROGRAM AT UPPSALA
UNIVERSITY, SWEDEN
Ernst van Groningen
Uppsala University, Sweden.
O-43
08:45-09:00
Au/TiO2 PLASMONIC STRUCTURAL SOLAR CELL: DESIGN,
TECHNOLOGICAL DEVELOPMENTS AND SEVERAL
OBTAINED EXPERIMENT RESEARCH RESULTS
Nguyen Thi Thuy, Vu Van Cat, Tran Van Viet, Phan Anh Tuan
and Dao Khac An
Institute of Materials Science, VAST
O-44
09:00-09:15
PHOTOCATALYTIC ACTIVITY OF VANADIUM AND
NITROGEN CODOPED TiO2 THIN FILMS: THEORETICAL AND
EXPERIMENTAL STUDY
Phung Nguyen Thai Hang, Nguyen Huu Ke, Duong Ai Phuong,
Le Vu Tuan Hung
University of Science Ho Chi Minh City, VietNam
O-45
09:15-09:30
OPTICAL PROPERTIES OF ERBIUM DOPED
PHOSPHATE GLASS
Nur Aina Mardia Adnan, Md. Rahim Sahar
Universiti Teknologi Malaysia
28
O-46
09:30-09:45
EXPANDING THE PHOTORESPONSE RANGE OF TiO2
MESOPOROUS BY CdS/CdSe/ZnS NANOSTRUCTURE COMODIFICATION
Thanh Tung Ha, Thanh Nguyen Nguyen, Quang Vinh Lam,
Thanh Dat Huynh
Dong Thap University; University of Science, Viet Nam National
University - HCM City; Viet Nam National University - HCM City
O-47
09:45-10:00
EPITAXIAL GROWTH OF GRAPHENE ON 4H-SILICON
CARBIDE SUBSTRATE BY SIMULATED ANNEALING
METHOD
L.H.Chien, S.K.Lai
National Central University, Chungli Taiwan;
University of Science, HCM, Vietnam
O-48
10:00-10:15
INVESTIGATION OF PARAMETER OF HPGe DETECTOR
USING MCNP5 AND PENELOPE CODE
Tran Thien Thanh, Huynh Thi Yen Hong, Vu Ngoc Ba,
Huynh Dinh Chuong and Chau Van Tao
University of Science, VNU – HCM
10:15-10:30
COFFEE BREAK
REPORT SESSION
Chairperson: Dr. Seam Ngonn (RUPP)
Prof. Nguyen Duc Hung (Vietnam)
O-49
10:30-10:45
MONOGENIC WAVELET TRANSFORM: EXTENSION TO
MULTISPECTRAL SIGNAL
Thai Ba Chien
University of Sciences and Technologies of Hanoi (USTH)
O-50
10:45-11:00
PHOTODECOMPOSITION OF PARAQUAT DICHLORIDE
USING ZIRCONIUM DOPED TITANIA AS PHOTOCATALYST
UNDER UV IRRADIATION
29
Nur Afiqah Badli, Rusmidah Ali and LenyYuliati
Universiti Teknologi Malaysia
O-51
11:00-11:15
EVALUATION OF SUATURATION CURVE OF ALUMINUM
USING GEANT4 CODE
Huynh Thi Yen Hong, Nguyen Thi Tram, Vu Ngoc Ba, Nguyen Ngoc
Lam, Lu Anh Huong, Huynh Dinh Chuong, Le Thi Ngoc Trang, Bui
Tuan Khai, Tran Kim Tuyet, Hoang Duc Tam, Tran Thien Thanh,
Chau Van Tao
University of Science, VNU – HCM;
University of Pedagogy, Ho Chi Minh City, Viet Nam
O-52
11:15-11:30
SILICA FIBER TIP AND MICROSPHERE INTERACTION
Le Huu Thang, Pham Van Hoi, Dinh Van Trung, Pham Thanh Son,
Nguyen The Anh, Nguyen Thuy Van, Bui Quoc Thu
Vietnam Metrology Institute, Directorate for Standards,
Metrology and Quality, Hanoi, Vietnam
O-53
11:30-11:45
THE ROLE OF PRASEODYMIUM OXIDE BASED CATALYST
IN METHANATION REACTION
Salmiah Jamal Mat Rosid, Wan Azelee Wan Abu Bakar
and Rusmidah Ali
Universiti Teknologi Malaysia
O-54
11:45-12:00
STUDYING THE FAST NEUTRON ACTIVATION AND X-RAY
FLUORESCENCE TO DETERMINE THE CONCENTRATION
OF SOME ELEMENTS IN GEOLOGICAL SAMPLE
Luu Dang Hoang Oanh, Trinh Quang Thanh, Huynh Truc Phuong
University of Science-Ho Chi Minh city, Viet Nam
O-55
12:00-12:15
ADDITION OF Cu AND Ni ONTO BaO CATALYST FOR
CATALYTIC DEACIDIFICATION REACTION OF
NAPHTHENIC ACID IN PETROLEUM CRUDE OIL
Norshahidatul Akmar Mohd Shohaimi, Jafariah Jaafar
and Wan Azelee Wan Abu Bakar
Universiti Teknologi Malaysia
12:15-13:30
LUNCH
30
REPORT SESSION
Chairperson: Prof. Uk On Norong (RUPP)
Prof. Dao Khac An (VAST)
O-56
13:30-13:55
THE SENSITIVE DETECTION OF NITRIC OXIDE BY
WAVELENGTH MODULATION ABSORPTION
SPECTROSCOPY USING A FREQUENCY-QUADRUPED
CURRENT-MODULATED SYSTEM
(Invited talk)
Lemthong Lathdavong, Phoukeo Thathilat and Vetpany Syvongxay
Faculty of Science, National University of Laos, Lao PDR
O-57
13:55-14:20
ELABORATION OF Fe(III)-TiO2 BY OXO-TiO2 CLUSTERS
DOPING IN A MICRO-MIXING SOL-GEL REACTOR.
APPLICATION IN PHOTOCATALYSIS
(Invited talk)
Siteng TIENG, Andrei Kanaev and Khay Chhor
Chemistry Department, Royal University of Phnom Penh, Cambodia
O-58
14:20-14:35
THE PERFORMANCE OF SARAL/AltiKA IN COASTAL REGION
Da Nguyen Dac, Fernando Niño, Florence Birol, Denis Blumstein
University of Science and Technology of Hanoi
O-59
14:35-14:50
IN-DEPTH OF SURFACE PROPERTIES INVESTIGATION
OVER CERIA BASED CATALYTS FOR CARBON DIOXIDE
METHANATION
Susilawati Toemen, Wan Azelee Wan Abu Bakar, Rusmidah Ali
Universiti Teknologi Malaysia
O-60
14:50-15:05
TRITERPENOIDSFROM PHALERIAMACROCARPA (SCHEFF.)
BOERL (THYMELAEACEAE)
Siti Nur Atiqah Md Othman and Norazah Basar
Universiti Teknologi Malaysia
31
O-61
15:05-15:20
EFFECT OF OXIDATION-EXTRACTION SYSTEM ON THE
DESULFURIZATION OF MALAYSIAN PETRONAS DIESEL
Wan NurAini Wan Mokhtar, Wan Azelee Wan Abu Bakar,
Rusmidah Ali, Abdul Aziz Abdul Kadir
Universiti Teknologi Malaysia
15:20-15:30
COFFE BREAK
REPORT SESSION
Chairperson: Prof. Hin Sam Ath (PPIU, Cambodia)
Prof. Le Vu Tuan Hung (VNU Ho Chi Minh)
O-62
15:30-15:45
SURFACE PROPERTIES OF SOME NITRAMINE
COMPOUNDSAND BINDERS
Ngô Văn Giao, Đỗ Xuân Thanh, Chu Chiến Hữu
Military Institute of Science and Technology,VietNam
O-63
15:45-16:00
ENERGY AND NUTRIENT RECOVERY FROM
SLAUGHTERHOUSE WASTEWATER TREATMENT
Le Anh Bang, Stalder T., Le Niniven C., Dagot C.
University of Science and Technology of Ha Noi, Viet Nam
O-64
16:00-16:15
SYNCHRONIZATION BETWEEN TWO CHAOTIC LORENZSTENFLO SYSTEMS VIA EVOLUTIONARY ALGORITHM
Nguyen Thanh Dung
Vietnam Aviation Academy, HCM, VietNam
O-65
16:15-16:30
ELECTRICAL AND THERMAL STUDY ON FERROELECTRIC
PHASE TRANSITION OF TRIGLYCINE SULPHATE
Sun Limhuor, and Ken-ichi Tozaki
Royal University of Phnom Penh
32
O-66
16:30-16:45
THE EFFECT OF CAPACITY OF SHEET PILE SHALLOW
FOUNDATION UNDER HORIZONTAL LOADING ON CLAY
Chamroeun Chhun, Pongsakorn Punrattanasin
Department of Civil Engineering, KhonKaen University, Thailand
16:45-17:15
CLOSING
Chairperson: Prof. Meak Kamerane, RUPP, Cambodia
Prof. Dr. Santi Maensiri, Dean, Suranaree
University Teknology, Thailand.
Prof. Dr. Nguyen Dai Hung, President, VSOS,
Vietnam
18:00 - 20:00
CONFERENCE PARTY
(Offered by CASEAN Organizing Committee)
33
Friday – November 15, 2013
ONE-DAY TOURS TO HISTORICAL & CULTURAL
RELIC IN PHNOM PENH, CAMBODIA
(Offered by Royal University of Phnom Penh)
34
ABSTRACT
35
O-01
DEVELOPING RESEARCH CULTURE AMONG
POSTGRADUATE STUDENTS: UTM EXPERIENCE AS A
REASEARCH UNIVERSITY
(Invited talk)
Madzlan Bin Aziz
Faculty of Science University of Technology Malaysia
36
O-02
PHYSICS AND APPLICATIONS OF GRAPHENE
Hyeonsik Cheong
Department of Physics, Sogang University, Seoul 121-742, Korea
Email: hcheong@sogang.ac.kr
Abstract.
The Nobel Prize in Physics in 2010 was awarded to Geim and Novoselov who
performed „groundbreaking experiments regarding the two-dimensional material
graphene.‟ Graphene is a single atomic layer of a graphite crystal which possesses many
novel physical properties. The thickness of a monolayer graphene sheet is only 0.34 nm.
Electronic states in graphene have a relativistic energy dispersion described by the
(2+1)-dimensional massless Dirac equation. Such a characteristic is of central
importance to the novel physical properties predicted in graphene, some of which
already have been observed in a number of different experimental setups. Graphene is
also attracting much attention as a next-generation electronic device material because of
novel properties such as very high mobility at room temperature.
In this presentation, I will review the recent progress in graphene research both in
scientific advances and technological developments. Research activities on graphene
and other nanomaterials at Sogang University will also be introduced.
37
O-03
PHOTONIC CRYSTAL MICROCAVITY DEVICES
Van Hoi Pham*, Huy Bui, The Anh Nguyen, Thanh Son Pham,
Thuy Van Nguyen, Quang Minh Ngo
Institute of Materials Science, VAST,
18 Hoang Quoc Viet Rd., Cau giay Dist., Hanoi Vietnam
Email*: hoipv@ims.vast.ac.vn
Abstract.
In this paper we present the results of the research and development of active optical
devices using 2- and 3-dimensional (2D and 3D) photonic microcavities. Various
important scientific and technological applications of photonic microcavities such as
ultra-low power operation of active optical devices, inhibition of spontaneous emission
and manipulation of light path are expected. We have developed a configuration of
photonic crystal microcavities based on Er-doped silica glass with ring and/or sphere
forms that efficiently controls cavity resonant frequencies and enables low threshold of
lasers. By coating noble metallic layers on a surface of glass we have obtained a lasing
wavelength shift and an enhancement of the emission intensity from microcavity. The
observation of upconversion emission of single-mode at the wavelength of 537 nm from
Erbium ions and its wavelength shift in the metallic-assisted microsphere lasers are
interesting for the study of atom-photon interaction phenomenon at room temperature.
Keywords: Photonic crystal microcavity, optical devices, upconversion emission.
Green emission from permanent Pt-coated Er-doped silica sphere
40000
537.077
Optical intensity (a.u)
35000
30000
25000
20000
15000
10000
5000
520
525
530
535
540
545
550
555
560
Wavelength (nm)
Fig. 1. Spectrum of upconversion
emission from Pt-coated on hemisphere
of silica microsphere cavity. The Ptfilm thickness is 750 nm, optical pump
power at 976 nm-wavelength is 2 mW,
and
the
measuring
angle
is
orthogonally to pump direction.
38
Fig. 2. Emitted intensity distribution versus
measurement angle to pump direction for
Pt-coated microsphere cavity. The optical
pump power at 976 nm-wavelength is 3.5
mW. Inset: Experimental setup for pump and
measuring upconversion emission from
microsphere cavity.
O-04
FILTERING, MODULATION AND DIFFRACTION:
FROM SIGNAL PROCESSING TO FOURIER OPTICS
Roberto Coisson
Department of Physics and Earth Sciences, University of Parma
area delle Scienze 7/A, 43100 Parma, Italy
Email: roberto.coisson@fis.unipr.it
Abstract.
Historically, the concepts of optical image processing were developed in analogy with
the processing of time signals. It is therefore of interest, from a didactic point of view,
to present the various operations on one-dimensional and two-dimensional signals in
parallel, showing how “modulation” corresponds to “diffraction”, and “filtering” to
“spatial filtering”. This approach shows how the concepts related to the Fourier
Transform can provide a simple and coherent framework for processing of both time
signals and optical images.
39
O-05
VARIOUS LIGHT ENERGY CONVERTING PROTEINS OF
BACTERIA FROM TONLE SAP LAKE, CAMBODIA
Choun Kimleng and Kwang-Hwan Jung*
Dept. of Life Science and Institute of Biological Interfaces, Sogang University,
Seoul, 121-742, Korea
Email*: kjung@sogang.ac.kr
Abstract.
Microbial rhodopsin is a seven transmembrane helix protein that has a retinal as
chromophore. Rhodopsins have function as light-driven ion transport, photosensing
activities (type I rhodopsin) and function as vision in animal eyes (type II rhodopsin)
[1]. Proteorhodopsin (PR) is an abundant microbial rhodopsin, which has a function as
light-driven proton pumps and was found in many different marine environments.
Recently, it has been reported for existence in non-marine environment with
homologous to PR. This study was carried out for further understanding of those partial
existing non-marine origin of opsins containing the conserved region sequence of
microbial rhodopsin [1, 2]. We isolated 10 distinguished partial sequences of opsin
homologues from Tonle Sap Lake, Cambodia. We constructed chimerical proteins by
insertion of those partial sequences to green light absorbing proteorhodopsin (GPR)
containing N-terminal and C-terminal regions. The partial sequences are containing
conserved region between helix C and helix F. The cassette insertion as previous report
has called “CFR, Chimeric Freshwater Rhodopsin”. To characterize these chimera fresh
water rhodopsin from Tonle Sap (CFR-TS), we overexpressed in E. coli and purified for
observing absorption spectra, different spectra, pKa value of proton acceptor, proton
pumping activities and photocycle properties. In this study we are using five partial
sequences to be characterized that name as CFR-TS1, CFR-TS2, CFR-TS3, CFR-TS4
and CFR-TS5. Those chimeric proteins were studied about their absorbance spectra
showing different absorbance at 518, 528, 526, 545 and 549 nm, respectively. [This
research was supported by NRF-2011-0012320].
40
O-06
INFLUENCE OF THE FEEDBACK STAGE TO THE
VERTICAL MOTION STABLE TRANSITION PROCESS
OF FIREFLIGHTING AIRCRAFT
Nguyen Quang Vinh*, Phan Tuong Lai, Nguyen Duc Anh
Vietnam academy of military science and technology
Email*: vinhquang2808@yahoo.com
Abstract:
The article proposes a method to define the vertical motion equation in a short period of
an aircraft and then models and considers influence of feedback forms to the vertical
motion stable transition process of a firefighting aircraft of type KA-32. Obtained
results showed that: if there is not any opposite contact circuit by the speed angle and
pitch angle then it is difficult for the control circuit of the aircraft‟s vertical motion to
ensure the control stability, on the other hand, the stability of the yaw angle, deviation
angle and pitch angle allows to increase signnificantly the fragmentary of the trajectory
control. Moreover, the stability of the position of the aircraft‟s angle is a necessary
condition to ensure the construction of automatic control systems which drive the
aircraft followed the angle position.
Keywords: automatic control, modelling simulation, firefighting aircraft.
41
O-07
THEORETICAL INVESTIGATION OF SOLITON PULSE
PROPAGATION INSIDE ADD-DROP MOBIUS MICRORING
RESONATOR
Ahmad Fakhurrazi Ahmad Noorden*1, Mahdi Bahadoran1, Azam Mohamad1,
Jalil Ali1, Preecha Yupapin2
1
Institute of Advance Photonics Science, Nanotechnolgy Research Alliance,
Universiti Teknology Malaysia (UTM), 81310 Johor Bahru, Malaysia
Advance Research Center for Photonics, Faculty of Science King Mongkut’s Institute of
Technology Ladkrabang Bangkok 10520, Thailand
2
Email*: jalilali@utm.com.my
Abstract.
We develop the analytical formulation for the modeling of propagation soliton pulse
within 2 configurations. The novel twisted ring resonator called add/drop-mobius ring
resonator (AMRR) is introduced and modelled using MATLAB programming with the
analytical solution of scattering matrix and signal flow graph methods. The light
behavior such as build-up intensity, compression intensity and insertion loss via AMRR
and add/drop ring resonator (ARR) are compared. Simulated results show that, the
AMRR configuration provides greater phase shift due to the longer length of
propagation per roundtrip than ARR configuration. The AMRR configuration is
achieved greater build-up factor which is 100 for 7 roundtrip as compared to
conventional ARR which has 50 for 6 roundtrip. For compression energy the AMRR
configuration reach 3 times than ARR at 200 roundtrip. The insertion loss of the AMRR
is lower as increase the outer radius of the ring resonator R2.
42
O-08
AN ALGEBRAIC COMBINATORIAL APPROACH TO THE
STUDY OF THE NONLINEAR SCHRÖDINGER EQUATION
ON A TORUS
Nguyen Bich Van
Institute of Mathematics, Vietnam academy of science and technology
Email: nbvan@math.ac.vn
Abstract:
We propose a new method to study the stability of a class of normal forms for the
nonlinear Schrödinger equation (NLS) on a torus. From this a delicate algebraic
combinatorial question (irreducibility and separation of a class of polynomials) arises.
Theorems can be also formulated as purely algebraic geometric questions with no
previous knowledge of the NLS.
Keywords: nonlinear Schrödinger equation, eigenvalue, irreducibility.
43
O-09
PREPARATION OF PLATIN NANOPARTICLES IN SOME
LIQUIDS BY LASER ABLATION
Quang Dong Nguyen 1*, The Binh Nguyen2, Trong Duc Tran2
Trinh Nguyen Thi2, Thu Hanh Nguyen Thi2, Thanh Hang Nguyen Thi2
1
Thai Nguyen University of medicine and pharmacy, TNU
2
Department of Physics, University of science, VNU HN
Email*: dong.nq@tnu.edu.vn
Abstract.
We studied to use Nd:YAG laser to produce platin nanoparticles in water, ethanol and
solution of polyvinylpyrrolidone (PVP) by laser ablation. The morphology and optical
properties of the nanoparticles were observed by a transmission electron microscopy
(JEM 1010 – JEOL) and UV – 2450 spectrometer. The role of laser fluence, laser
irradiation time, laser wavelength and surfactant liquids laser ablation process were
studied. The average diameter of platin nanoparticles in water, solution of 40 % ethanol
and 0.01 M solution of PVP were 12 nm, 13 nm and 11 nm, respectively. The
experimental results showed advantages of the laser ablation method. The results and
discussions will be reported in this paper.
Keywords: laser ablation, plasmon resonanchge, laser fluence.
44
O-10
WHAT CAN CATALYSTS DO FOR LIVING THINGS?
Wan Azelee Wan Abu Bakar*, Rusmidah Ali, Razali Ismail, Susilawati Toemen
and Wan Nur Aini Wan Mokhtar
Department of Chemistry, Faculty of Science, UniversitiTeknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: wazelee@kimia.fs.utm.my
Abstract.
The catalytic conversion of CO2 to CH4 is one of the most promising technology for the
reduction of greenhouse gas CO2 emission to the atmosphere. This paper will highlight
the treatment of coal burning power plant flue gases which comprises of CO2 gas, to
valuable product of CH4 can be used as a fuel to run the turbine for electricity
generation. It was found that Ru/Mn/Ce-65/Al2O3 catalyst calcined at 1000oC;
pretreatment at 300oC for 30 minutes under reducing environment, offers 97.73% CO2
conversion with 67.42% CH4 formation at reaction temperature 300oC. Furthermore, the
catalytic chelation method to remove heavy metals like arsenic (As), lead (Pb),
cadmium (Cd) and nickel (Ni) from local mussel, P. viridis, was successfully
accomplished. The results showed that in the presence of CaO/Al2O3 catalyst, the
sodium acetate gave the highest percentage removal of heavy metals (As 59.50%, Pb
88.57%, Cd 68.01% and Ni 79.67%) followed by disodium oxalate (As 46.89%, Pb
85.46%, Cd 60.41% and Ni 47.80%) and trisodium citrate (As 38.13%, Pb 68.90%, Cd
70.49% and Ni 36.92%). The findings showed that sodium acetate was able to chelate
and remove all the studied heavy metals to levels below the permissible limit set forth
by Malaysian Food Regulations (1985) and EU Commission Regulation (2006).
Interestingly, catalytic desulfurization of diesel utilizing Fe/Mn/Al2O3 catalyst was
investigated. Malaysian Euro-2 diesel with 500 ppm sulfur compounds content, was
efficiently reduced to < 50 ppm in the optimum reaction conditions of; extraction
solvent (N,N-dimethylformamide, DMF), DMF volume ratio (1.0), extraction
temperature (29°C), extraction time (30 minutes), oxidant (tert-butyl hydroperoxide,
TBHP), TBHP molar ratio (3), oxidation temperature (45°C), oxidation time (30
minutes) using extraction-oxidation-extraction system. In conclusion catalysts have
important role to benefit the world and providing healthy, green and sustainable
environment for living.
45
O-11
AN ALGORITHM FOR DETERMINING THE NAVIGATION
PARAMETERS OF AUVs BASED ON THE COMBINATION
OF MEASURING DEVICES
Thuan Tran Đuc, Lai Phan Tuong, Vinh Nguyen Quang,
Ngoc My Bui, Trung Truong Duy*
Academy of Military Science and Technology
Email*: tdtrung_tdh05@yahoo.com
Abstract.
An extended nonlinear Kalman filter (EKF) for real-time estimation of Autonomous
underwater vehicles (AUVs) navigation parameters based on the combination of angular
rate sensors, magnetometers, accelerometers and speedometers, pressure sensors or GPS
is newly developed. Due to the combination of the measuring devices using the EKF,
the accuracy of navigation parameters is improved because the drifts of angular rate
sensors, accelerometer and measuring noise of the measuring devices are ignored.
Moreover, this combination helps to reduce the capacity of computation in comparison
with inertial navigation methods.
Keywords: Extended nonlinear Kalman filter, angular rate sensors, magnetometers,
accelerometer, speedometers, pressure sensors, GPS.
46
O-12
DEVELOPMENT OF TOOLS TO CHARACTERIZE SPATIAL
FUNCTION IN NEURONAL DIFFERENTIATION AND
INFERTILITY
Le Thi Khanh, Dr. Catherine Nguyen
UMR 1090- TAGC Inserm, 163, Avenue de Luminy, 13288, Marseille cedex 9, France
Email: khanhbiohus@gmail.com
Abstract.
SPATIAL (Stromal Protein Associated with Thymii And Lymph node) gene is expressed
in highly polarized cells such as thymic epithelial cells, testicular germ cells and
neuronal cells of the central nervous system. M. Saade et al [1]. M. Irla et al [2, 3].
Differentiation of these cells is accompanied by a polarized distribution of SPATIAL in
highly organized microtubule structures such as the manchette, the flagellum and the
dendrites. During brain development, SPATIAL expression overlaps with the beginning
of neuronal differentiation in both cerebellum and hippocampus suggesting a function
for SPATIAL in neuronal differentiation and morphogenesis M. Irla et al [3]. As part of
this project, the objective is to continue identifying gene function SPATIAL (possibly in
morphogenesis). To address the characterization in humans by first identifying its
partners, more than thirty potential partners were identified by two-hybrid approach
from a cDNA library of human testes in 2008. In this study, we aim to further confirm
these parnerships by using co immunoprecipate and start with several candidates, which
are AKAP3, CAMK1, MRLC2, FGFR1OP, and SLC26A8. Along with SPATIAL, they
were cloned successfully from human testis cDNA library into mammalian expression
vectors, pCCL-Myc N term vector and pCCL-6His- FLAG- Thrombin, respectively.
These recombinant constructs were introduced to the HEK 293T, and expression of the
genes are being identified by Werstern blotting before doing co IP at this time. We are
going to confirm the interaction between SPATIAL and other candidates and to identify
the regulatory networks in which Spatial is involved relying on bioinformatics tools in
the near future.
47
O-13
THE PHOTOLUMINESCNECE CHARACTERISTICS
OF Eu3+ DOPED LITHIUM TELLURITE GLASS
Siti Aishah Jupri*, Md. Rahim Sahar
Advanced Optical Material Research Group, Department of Physics, Faculty of Science,
Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
Email*: rahimsahar@utm.my
Abstract.
A series of (70-x) TeO2 – (10) LiO2 – (20) LiCl – (x) Eu2O3 with 0.0 ≤x≤ 2.0 mol% has
been made using melt-quenching technique and their optical characteristic has been
studied. As the samples are excited at 393 nm, six emission peaks have been observed at
532, 552, 586, 613, 649, and 697 nm indicating the transitions of 5D1 → 7F1, 5D0 → 7F0,
5
D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3 and 5D0 → 7F4 respectively. It is observed that
transition 5D0 → 7F2 shows the most outstanding intensity. The intensity of emission
increases with the increment of Eu2O3 concentration.
Keywords: melt-quenching, photoluminescence.
48
O-14
FRACTION AND PURIFICATION OF ANTIOXIDANT
PHLOROTANNIN FROM BROWN ALGAE SARGASSUM
SERRATUM VIET NAM
Dang Xuan Cuong*, Bui Minh Ly, Vu Ngoc Boi, Tran Thi Thanh Van
1
Department of Analysis Chemical and Technology Development,
Nha Trang Institute of Technology Application and Research,
02 Hung Vuong – Nha Trang – Khanh Hoa – Viet Nam
Email*: cuong_mails@yahoo.com.vn
Abstract.
The ethanol extract from brown algae species Sargassum serratum was segmented
using others organic solvents follow order: n - hexan, chloroform, ethyl acetate and nbutanol. The fractions was evaluated antioxidant activities and phlorotannin content.
The fractions also run LC/MS. The fraction of ethyl acetate showed the highest of
antioxidant activities and phlorotannin content. The ethyl acetate fraction continues to
be cleaned using chloroform and n-butanol. The residue of ethyl acetate fraction was
loaded into Sephadex LH20 column. The fraction 22 was collected from Sephadex
LH20 column showed the high purification with phlorotannin and antioxidant activities.
The fraction 12 to 16 and 22 to 34 were run 1H-NMR and 13C-NMR spectroscopy.
From the collected results, phlorofucofuroeckol-A was showed to exist higher than 92%
in these fraction.
Keywords: Antioxidant, brown algae, phlorotannin, Sargassum serratum, Sephadex
LH20
49
O-15
GAS PHASE MONITORING IN VHF-PECVD PROCESS
OF SiC DEPOSITION USING OPTICAL EMISSION
SPECTROSCOPY
Nursyahirah Mustapha* and Raja Kamarulzaman Raja Ibrahim
Advance Photonics Science Institute, Faculty of Science, Universiti Teknologi Malaysia, 81310
UTM Johor Bharu, Johor, Malaysia
Email*: rkamarulzaman@utm.my
Abstract.
A gas mixture of Silane, Methane and Hydrogen are used to fabricate Silicon Carbide
(SiC) films by Very High Frequency-Plasma Enhanced Chemical Vapor Deposition
(VHF-PECVD) at a plasma excitation frequency of 150 MHz. The films were growth
under different deposition parameters, where the chamber pressure, gas flow rate, RF
power and substrate temperature were verified. During the CVD process, gas phase
monitoring was in situ carried out by using Optical Emission Spectroscopy (OES)
technique and it showed the dependency of intensity on the deposition parameters.
Characteristics of films produced were investigated using several methods and a
correlation between gas phase and film characteristics was done.
Keywords: VHF- Plasma Enhanced Chemical Vapor Deposition, thin film, Optical
Emission Spectroscopy
50
O-16
DESIGN PARAMETERS CONSIDERATIONS OF A CYLINDER INNER - CONE BLACKBODY SIMULATOR CAVITY BASED
ON ABSORPTION OF REFLECTED RADIATION MODEL
Nguyen Quang Minh* and Ta Van Tuan
Center for System Engineering and Integration (CSEI) - National Center for Technological
Progress (NACENTECH) – Vietnam
Email*: nqminh2001@yahoo.com
Abstract.
A design idea based on absorption analysis of the specular reflection component of a
cylinder-inner-cone blackbody cavity to be used in IR camera correction is presented.
According to the model describing the relation of the absorption index of a cylinderinner-cone cavity and maximum number of internal reflection of incident radiation, one
can get simple generalized formulae representing correlated relation between number of
internal reflection and geometrical parameters of blackbody cavity in the case of
normalized incident rays. Using this relation one can consider the basic system design
parameters of interested blackbody cavity. The results obtained are used in a blackbody
simulator fabrication carried out at CSEI (Nacentech).
51
O-17
MAGNETIC ACTIVATED CARBON FROM PALM KERNEL
SHELLS FOR ARSENIC REMOVAL FROM WATER
Nur Asilayana Mohd Asri*, Zaiton Abd. Majid and Jafariah Jaafar
Department of Chemistry, Faculty of Science, UniversitiTeknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: zaiton@kimia.fs.utm.my
Abstract.
The main concern of Arsenic (As) is its health implications even at very low
concentration. Removal method for As includes oxidation and precipitation, coagulation
and coprecipitation, nanofiltration, reverse osmosis, electrodialysis, adsorption, ion
exchange, foam floatation, solvent extraction and bioremediation. Activated carbon
(AC) has been shown to be very effective in removing organic contaminants from
water. The use of magnetic AC (MAC) is gaining attention since it can be easily
separated using magnetic separator even at high concentration of solids in the solution.
The aim of the research is to prepare MAC for the removal of arsenic in water. AC is
prepared from PKS by activating for two hours at temperature ranging from 400 oC to
500oC with 10%, 20%, 30%, 40% and 50% (w/w) concentration of phosphoric acid.
Magnetite used in the preparation of MAC is prepared with two different techniques;
magnetite extraction from electric arc furnace (EAF) slag and preparation from a
suspension of ferric chloride and ferrous sulfate. MAC is prepared by mixing powdered
AC with the above suspension. Commercial activated carbon (CAC) undergoes similar
procedure and is used as comparison to PKS AC. Adsorption of As onto MAC is
analyzed by using Langmuir, Freundlich, Temkin and Dubinin- Radushkevish isotherm
model. Single point Brunauer- Emmett- Teller (BET) surface area showed that the
surface area of CAC is 846.15 m2/g, while magnetic CAC produced by using slag and
the suspension are 9.64 m2/g and 833.73 m2/g, respectively. The raw PKS has very low
surface area (6.84 m2/g). The surface area of AC produced shows an increment as the
concentration of phosphoric acid increases. The AC with 50% acid concentration
showed the largest surface area (1225 m2/g) compared to 40% and 30% with surface
area of 901.83 m2/g and 861.29 m2/g, respectively. The X-ray diffractogram showed six
peaks which can be assigned to magnetite at 2Ɵ 19.82o, 30.05o, 35.89o, 42.78o, 57.97o
and 62.52o. The prepared AC and MAC is characterized using Fourier Transform
Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Field Emission
Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX) and nitrogen
adsorption at 77 K. The arsenic contaminated water was treated through batch feeding
system or batch reactor. The rapid and slow adsorption exist simultaneously when
activated carbon is used to remove arsenic.
Keywords: Arsenic, Activated carbon, Magnetic activated carbon, Magnetite
52
O-18
STUDY OF STABILITY PARAMETERS PHYSICAL EMITTED
BEAM FROM MACHINE RADIOTHERAPY ACCELERATOR
Nguyen Dang Nhuan1, Pham Van Khac2
1
Oncology center -Thai Nguyen general center hospital,
No. 479 Luong Ngoc Quyen Road, Thai Nguyen City, Thai Nguyen Province
2
Oncology center oncology-Thai Nguyen general center hospital,
No. 479 Luong Ngoc Quyen Road, Thai Nguyen City, Thai Nguyen Province
Ab s t ra ct .
Measurement standards and ensures stability dosage technical parameters of radiation
therapy systems in general, of the accelerator in particular is one of the most important
tasks in the process to ensure the quality of treatment (Quality Assurance-QA). To
exploit the effectiveness and safety of radiotherapy equipment in general, radiotherapy
accelerators in particular it is important to ensure regular and maintain the stability of
the technical parameters of the device. Which ensure the stability of the physical
parameters of the radiation beam in the machine after a long time of operation is a
particularly important and should be maintained as it relates to effective treatment. The
research problem in this topic to help evaluate and adjust technical parameters stability
of radiotherapy accelerators.
K eyw o rd s: QualityAssurance-QA
53
P-01
APPLICATION OF LOW POWER SEMICONDUCTOR LASER
IN VARICOSE VEINS TREATMENT
Tran Minh Thai*, Ngo Thi Thien Hoa, Tran Thi Ngoc Dung,
Tran Thi Lien Minh, Can Van Be
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email*: tmthai_dhbk@yahoo.com
Abstract.
Probability of people who have varicose veins is high. Today, there are many therapies
for this illness such as: fiber injection, application of RFA, stripping or Muller surgery,
inner vein high power laser. These therapies have some certain disadvantages
(destroying, relapsing, complicating, expensive). However, low power semiconductor
laser can provide optimal affects than the above therapies. These include the effect of
two simultaneous wavelengths (780 nm and 940 nm) to speed up the biological process,
healing the wound smaller than 100 cm2, recovering the vein cocks, activating the
immune system... As a result of that, we design successfully the model equipments for
the treatment consisting of 12 channel opto - acupuncture, opto - therapy semiconductor
laser and inner vein low power semiconductor laser equipment. These equipments are
being used in some medical institutions.
54
P-02
OPTICAL PROPERTIES OF CdSe QUANTUM DOTS
PREPARED BY WET CHEMICAL METHOD USING CITRATE
Chu Viet Ha*1, Tran Anh Duc2, Nguyen Thi Van1 and Vu Thi Kim Lien1
1
Thai Nguyen University of Education, Thai Nguyen, Vietnam
2
Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
Email*: chuvietha@tnu.edu.vn
Abstract.
The CdSe quantum dots have been synthesized via wet chemical method using citrate as
surfactant agent. The prepared quantum dots are mono – dispersed in aqueous solution
with the size varying from 3.5 to 10 nm. The investigation of photoluminescence
emission properties shows a photostability of the quantum dots in different pH
environment. The photostability also has been examined by observing the evolution of
fluorescence spectra and quantum yield with storing time. The results show that the
CdSe quantum dots have high photostability which is almost unchanged after many
months, and promise to be suitable for biolabeling.
Key word: quantum dots, CdSe, citrate, aqueous solution, biolabelling
Figure 2. Photo image of CdSe/CdS
QDs samples under ultraviolet light.
Figure 1. TEM images of CdSe
quantum dots emissing at 605 nm.
594
w = 1.5
w=2
w = 2.5
0.20
w = 1.5
w=2
w = 2.5
150
Intensity (a.u.)
Absorbance (a.u.)
0.25
0.15
0.10
0.05
100
603
589
50
CdSe Bulk
0.00
400
500
0
600
Wavelength (nm)
500
550
600
650
700
Wavelength (nm)
Figure 3. Absorption spectra of
CdSe/CdS quantum dots synthesized
with different concentration of citrate.
55
Figure 4. Fluorescenc spectra of
CdSe/CdS quantum dots synthesized with
different concentration of citrate.
P-03
APPLICATION OF WAVELET TRANSFORMS FOR NON
DIRECTIONAL BEACON SYSTEM
Mai Thanh Phong*1, Phan Thanh Vu1, Duong Thi Cam Tu1, Nguyen Thanh Dung2
1
Faculty of Electrical and Electronics Engineering,
University of Technical Education of Ho Chi Minh City,
Vo Van Ngan Str. 1; Thu Duc District, Ho Chi Minh City
2
Faculty of Aeronautical Electronics–Telecommunication Engineering,
Vietnam Aviation Academy,
104 Nguyen Van Troi st., Phu Nhuan Dist, Ho Chi Minh City, Vietnam.
Email*: maithanhphong2012@gmail.com
Abstract.
This paper presents and application of Wavelet transform to reduce noise in Non
Directional Beacon system. Wavelet transform was used to reduced noise in the
received signal. Wavelet transform expand data into two groups of coefficients:
approximation coefficients and the detail coefficients on each level. Noise was mainly
in the detail coefficients of each level. At each level must have an appropriate cut-off
threshold. The signal was restored by the approximation coefficient. Then noise would
be removed at the receiver signal in Non Directional Beacon system.
56
P-04
APPYING THE COLEGRAM SOFTWARE TO THE ANALYSIS
OF RADIATION SPECTRA
Nguyen Thi Minh Sang
University of DaLat, 01 Phu Dong Thien Vuong Street, DaLat
Email: sangntm@dlu.edu.vn
Abstract.
At present, there is many computer software used for processing and analyzing spectra.
As a result, the best one should be chosen in regard to its optimum effectiveness and
economy efficiency. This paper introduces a method of analyzing spectra employing
Colegram, a computer program and the application of this program to analysis the
spectrum of isotope Cl36. The result is used to determine the appropriate model for
fixing the data optimally.
57
P-05
CALIBRATION AGAINST ORIENTATION DRIFT IN A REAL
TIME EMBEDDED INERTIAL MEASUREMENT UNIT
Bui Hong Hue*1, Tran Xuan Kien2, Do Duc Hanh3, Doan Minh Dinh4
1
2
3
College of Urban Works Construction, Hanoi, Vietnam
Military Science and Technology Institute, Hanoi, Vietnam
Depatment of Control Engineering, Military Technical Academy, Hanoi, Vietnam
4
General Technical Department, Defense Ministry of Vietnam
Email*: ngochuy.buihue@gmail.com
Abstract.
This paper presents the development and implementation of an Inertial Measurement
Unit (IMU) where Micro-Electro-Mechanical System (MEMS) sensors are used to
measure angular velocity and acceleration, a magnetic sensor (magnetometer) is used to
calibrate against orientation drift, a GPS signal receiver is integrated and an extended
Kalman filter algorithm is applied for real time signal processing to estimate the attitude
of an object in space. MATLAB/Simulink Embedded tools and compiler C30/MPLAB
are used to design, compile, and download directly into the target. An update rate of
100Hz with real time floating point processing can be achieved for the extended
Kalman algorithm using a Microchip 16 bit dsPIC33f256 microcontroller.
Keywords: IMU, MEMS sensor, Extended Kalman filter, attitude estimation
58
P-06
CARBON NANOTUBE BASED ADDITIVES
FOR MINERAL OILS
Ha Quoc Bang, Tran Son Hai, Nguyen The Nghiem,
Nguyen Manh Tuong, Nguyen Tran Hung*
Institute of Chemistry and Materials Science, Military Institute of Science and Technology,
No17, Hoang Sam Str., Cau Giay Dist., Hanoi, Viet Nam
Email*: nguyentranhung2002@yahoo.com
Abstract.
In this paper we present some preliminary research in chemical functionalization of
carbon nanotubes and their application for mineral oils. Amide functionalized carbon
nanotubes can be dispersed in mineral oils, form a stable dispersion. Testing results
have shown that such amide functionalized carbon nanotubes can improve some
properties of mineral oils, such as the oxidation stability and the anticorrosion ability.
Keywords: carbon nanotubes, chemical functionalization, mineral oil.
59
P-07
APPLICATION OF LOW POWER SEMICONDUCTOR LASER
FOR REHABILITATION OF LIVER FUNCTION DAMAGED
BY DRUG ADDICTION
Tran Thien Hau*, Tran Dinh Hop, Tran Thi Ngoc Dung, Tran Minh Thai.
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email*: thienhau2004@yahoo.com
Abstract.
To rehabilitate liver function damaged by drug addiction, we irradiate simultaneously
low power laser beams of 780 nm and 940 nm wavelengths at the abdomen skin outside
the liver, and stimulate the acupuncture points with lasers of 940 nm wavelength. In
liver cells there are two types of enzymes, ALT (Alanine aminotransferase) and AST
(Aspartate aminotransferase). The normal value of these two enzymes in the blood is
less than 40 U/L. When liver cells are inflamed or necrotic, the enzymes from liver cells
are released into the blood. Thus, increasing liver enzymes is indirect signs to indicate
the destruction of liver cells. This paper reports the results obtained from the treatment
of 65 drug addicts after having detoxification. The average concentration in blood of
ALT and AST, which were 117.77 U/L, and 77.9 U/L before treatment, returned to
normal values 32.5 U/L, and 30.3 U/L respectively after treatment. Clinical treatment
results showed the efficiency of the application of low power laser in recovering the
liver function of drug addicts.
Keywords: drug addiction, low power laser, acupuncture points, AST, ALT,
rehabilitation, liver function.
60
P-08
DIELECTRIC AND NONLINEAR CURRENT - VOLTAGE
CHARACTERISTICS OF La - DOPED BiFeO3 CERAMICS
Benjaporn Yotburut*1, 2, Teerapon Yamwong3 and Santi Maensiri1, 2
1
School of Physics, Institute of Science Suranaree University of Technology,
NakhonRatchasima, 30000 Thailand
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, NakhonRatchasima 30000, Thailand
3
National Metals and Materials Technology Center (MTEC), Thailand Science Park,
Pathumthani 12120, Thailand
Abstract.
The effect of La dopant on the electrical propertiesof co-precipitation prepared BiFeO3
ceramics were investigated. A high voltage measuring unit and precision impedance
analyzer were used to determine the nonohmic (J-E) behaviors and measure the
dielectric properties and impedance spectroscopy of the Bi1-xLaxFeO3 ceramics. The
results showed that La improved significantly the break down field and the nonlinear
coefficient of the BiFeO3 ceramics. Investigation of non-ohmic electrical properties
indicated that the breakdown electric field strengthwas markedly increased by
substitution of La ions whereas the potential barrier height at grain boundaries
decreased from 0.3 eV to 0.16 eV.Impedance spectroscopy analysis revealed the
electrical resistance of the grain boundary decreased with increasing dc bias (0 - 20 V),
while grain resistance of all samples was independent of dc bias. The overall nonlinear
electrical of the La-doped BiFeO3 ceramics are very similar tothose observed in the Ladoped CCTO ceramics (Vangchangyia et al [1]).
61
P-09
CLONING, EXPRESSION AND PURIFICATION OF GENE
ENCODING L-ASPARAGINASE IN PICHIA PASTORIS GS115
Do Thi Tuyen, Nguyen Tien Cuong, Nguyen Thi Hien Trang, Quyen Dinh Thi*
Institute Biotechnology, Vietnam Academy of Science and Technology
Email*: quyen@ibt.ac.vn; Tel: 04.7568260
Abstract.
The gene L-asparaginase was obtained from the GenBank with the number code
X12746. Its sequence is similar as that in Erwinia Chrysanthemi NCPPB1125. This
gene was used as templates by excluding the native signal sequence using L-AspF
forward primer, and L-AspR with EcoRI and NotI restriction sites underline
respectively. The pJAsp products were then digested by restriction enzymes EcoRINotI. It was followed by the ligation of the digested pJAsp products with linearized
pPIC9K by the same restriction enzyme, resulting in pPic9KAsp under the control of
the AOX1-promoter induced by methanol and possessed the Geneticin® resistance
marker. The plasmid pPic9KAsp was linearized with SacI and then transformed into P.
pastoris GS115 according to the manufacturer‟s instructions of the EasySelect Pichia
Expression Kit (Invitrogen Corp., Carlsbad, USA). Transformants were screened on
YPDS plates containing Geneticin® at a final concentration of 0.25 mg/ml. The
presence of the asp gene in the transformants was confirmed by PCR using yeast
genomic DNA as a template and asp-specific primers. Clones that show the right size of
the PCR product and Geneticin® resistance marker were selected for the expression. P.
pastoris transformants were grown in the YP media. The cell pellets was then harvested
by centrifugation at 5000 rpm for 5 min. For AOX1 promoter-controlled expression of
the L-asparaginase, the cell pellets was resuspended in 25 ml of YP media
supplemented with 0.5 % (v/v) methanol and every 24 hours to maintain induction.
Cultivation was performed at 28C and 220 rpm. The culture supernatant was collected
periodically to detect L-asparaginase activity.
Keywords: L-asparaginase; pPIC9K; P. pastoris GS115; pPIC9KAsp.
62
P-10
CONTROL OF THE OPTICAL PROPERTIES OF COLLOIDAL
ZnCdS NANOCRYSTALS BY VARYING THE MONOMER AND
STEARIC ACID CONCENTRATIONS IN OCTADECENE
Hoang Thi Lan Huong1, Nguyen Anh Tu2, Pham Minh Kien*3,
Nguyen Thi Thuy Lieu1, Nguyen Xuan Nghia4
1)
Pots and Telecommunications Institute of Technology,
Vietnam Post and Telecommunication Group, Km 10, Nguyen Trai Rd., Ha Dong, Hanoi
2)
3)
4)
Hanoi University of Science, Vietnam National University,
334 Nguyen Trai, Thanh Xuan, Hanoi
Institute of Physics, Vietnam Academy of Science and Technology,
10 Dao Tan, Ba Dinh, Hanoi
Institute of Materials Science, Vietnam Academy of Science and Technology,
18 Hoang Quoc Viet, Cau Giay, Hanoi
Email: nghianx@ims.vast.ac.vn;
Abstract.
Here we report the effects of monomer and stearic acid concentrations in
noncoordinating solvent on the optical properties of colloidal ZnCdS nanocrystals.
Colloidal ZnCdS nanocrystals have been synthesized at 260oC using zinc stearate,
cadmium oxide and sulfur as precursors and octadecene as the reaction medium. The
concentration of Zn and Cd was varied in the range from 0.05 to 0.02 M, and
concentration of stearic acid from 0.007 to 0.02 M. It was found that the absorption and
photoluminescence spectra of ZnCdS nanocrystals shift to long wavelength with
increasing the monomer and stearic acid concentrations (Fig. 1 and 2). The temporal
evolutions of spectroscopic characteristics were discussed in relation to the growth,
chemical reactivity of precursors and change in structure of ZnCdS nanocrystals [1 - 3].
Fig. 1. Absorption and photoluminescence
spectra of ZnCdS nanocrystals prepared
with the different monomer concentrations.
Fig. 2. Absorption and photoluminescence
spectra of ZnCdS nanocrystals prepared with
the different concentrations of stearic acid.
63
P-11
CONTROLLING THE DEVICES VIA BLUETOOTH USING
THE ANDROID OPERATING SYSTEM
Duong Thi Cam Tu*1, Pham Duy Thanh1, Hoang Ngoc Minh1,
Phan Thanh Vu1, Mai Thanh Phong1, Nguyen Thanh Dung2
1
Faculty of Electrical and Electronics Engineering,
University of Technical Education of Ho Chi Minh City,
Vo Van Ngan Str. 1; Thu Duc District, Ho Chi Minh City, Vietnam
2
Faculty of Aeronautical Electronics–Telecommunication Engineering,
Vietnam Aviation Academy, 104 Nguyen Van Troi st., Phu Nhuan Dist,
Ho Chi Minh City, Vietnam.
Email*: tu.duong@hcmute.edu.vn
Abstract:
This work presents a model of controlling device system via Bluetooth. The program is
programmed by Android - the operating system. It is not only applying in the
controlling device in smart house but also saving the costs because of its versatility. The
Android system was set up in the cell phone so that cell phone will become the
controlling device. Beside the software, a controlling board was designed to connect the
devices. It has been found to control the devices by relays with maximum 230 V and 3
A in 10 meters via Bluetooth and measure the temperature from 0 oC to 128 oC in room.
In addition, the stability of the system is also tested several times in experiment.
Keywords: Android, Bluetooth, smart house
64
P-12
DATA BASES FOR SYNTHESIS OF CATALYSTS FOR THE
PREPARATION CARBON NANOTUBES
BY WET COMBUSTION METHOD
Tran Van Hien1, Nguyen Manh Tuong1*, Nguyen The Nghiem1, Nguyen Dinh Ha2
1
Institute of Chemistry-Material
2
Institute Number 78
Email*: manhtuong74@gmail.com
Abstract.
Calculation of heat and gases emitted during the fabrication of metal oxide catalyst for
synthesis of carbon nanotubes by the wet combustion method. The metal oxide is
formed on the basis of the reaction between metal nitrates with organic reductants.
Results indicated that the heat of reaction emitted when using organic reductants in the
order as follows: NH2CH2COOH > C6H8O7 > (NH2)2CO >> C2H2O4, and gas in order
as follows: C2H2O4 >> (NH2)2CO > NH2CH2COOH ~ C6H8O7. The values of specific
gas was calculated on gram of metal oxide formed, are reduced from 10.54 to 2.34
dm3/g depending on the nitrate used, in the order as follows: Al> Mg> Ca> La> Co ~
Ni> Li> Zr> Na> K> Ba.
Keywords: CNTs, Catalysts, oxide metal.
65
P-13
ISOLATION AND CHARACTERIZATION OF MERINE
ATINOMYCETES HP411 AND ITS POTENTIAL IN
ANTIBACTERIAL AND ANTICANCER ACTIVITY
Pham T. Huyen*, Le G. Hy, Phi Q. Tien, Ho Tuyen, Bach T. M. Hoa, Vu T. H.
Nguyen, Dang T.T. Duong, Quach N. Tung, Nguyen P. Nhue
Department of Fermentation Technology, Institute of Biotechnology,
Vietnam Academy of Science and Technology,
18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
Email*: pthuyen@ibt.ac.vn
Abstract.
HP411, a marine actinomycetes isolated from the sediment in Northern coast, Vietnam.
It could growth rapidly on starch casein agar and other media with high salt containing
medium 7-10% NaCl at 28-30oC. Spore of strain HP411 showed an elongated and
circular shape with 10 to 30 spore-chain structures. Based on phylogenetic and
phenotypic evidence it is proposed that the HP411 to be a unknown subline within a
group of Streptomyces species. It showed good antibacterial activity against
Enterobacter aerogenes ATCC 13048, Staphylococus epidemids ATCC 12228, Bacillus
cereus ATCC 11778, Bacillus subtilis ATCC 6633, Escherichia coli ATCC 11105,
Alcaligenes faecallis, Sarcina lutea, Shigella sp., Proteus vulgaris, Pseudomonas
auroginosa and fungal strain Candida albicans ATCC 10231. Interestingly, crude
extract of Streptomyces HP411 could obtain the anticancer activity for liver cancer HepG2, skeletal muscle heath cancer RD and membrane uterus cancer FI.
Keywords: Marine
Streptomyces
actinomycete,
Actinomycetes,
66
Antibacterial,
Anticancer,
P-14
ELECTROMAGNETICALLY INDUCED TRANSPARENCY IN
FIVE-LEVEL CASCADE SCHEME OF 85Rb ATOMS:
AN ANALYTICAL APPROACH
Pham Van Trong1, Nguyen Manh An1, Le Van Doai2, Dinh Xuan Khoa2
and Nguyen Huy Bang2
1
Faculty of Nature, Hong Duc University, 565 Quang Trung Street, Thanh Hoa City, Vietnam
2
Faculty of Physics, Vinh University, 182 Le Duan street, Vinh City, Vietnam
Email: bangvinhuni@gmail.com
Astract.
Electromagnetically induced transparency (EIT) is a quantum interference effect which
makes a resonance medium become transparent and steeper dispersive for a probe light
field under induction of other strong coupling light field. The effect was introduced
theoretically in 1990 [1] and experimentally verified in 1991 [2]. Since then, EIT has
attracted a tremendous interest over the last years due to its unusual properties and
promising potential applications, such as all optical switching [3], slow-light group
velocity [4], quantum information [5], nonlinear optics at low light level [6],
enhancement of Kerr nonlinearity [7], and high resolution spectroscopy [8]. Several
reviews on progress in EIT effects and related applications are available [9 - 12] giving
deeper insight into the topic and providing lists of original references.
In the early year of EIT study, three-level configurations were the main objects giving
single-window EIT signature. It is worth to mention here that the linear and nonlinear
susceptibilities of such three-level systems are well understood and able to represent
analytically. Such sufficient knowledge has promoted significant progress in
implementation of applications related to EIT phenomena [9].
From practical perspective, extension from single to multi-window EIT is currently of
interest due to it gains diversifying usefulness. As an example is to simultaneously
support slow group velocity for pulses at different frequencies [13, 14] in which light
fields has advantage in production of quantum entanglement.
A possible way for obtaining multi-EIT window is to use additionally controlling fields
to excite further levels (beyond three-level models). An illustration for this prototype is
N-level system excited by (N-1) applied electromagnetic fields giving (N-2) transparent
windows [15]. Another way is to use only one controlling field to couple
simultaneously several closely spacing hyperfine levels. This was first demonstrated by
Wang et al [16] for a five-level cascade scheme of cold 85Rb atoms in a magneto-optical
trap. The authors observed unusual signatures of EIT and explained by numerical
simulations. Although the numerical simulations were helpful to explain experimental
67
observation in [16] but there still lack of analytical representation of EIT spectra. Such
shortage has hampered implementation of further studies related to the five-level
cascade EIT system, e.g., Kerr nonlinearity, slowing-lights, and multi-wave mixing. As
in several applications related to such multi-level system, analytical representation of
EIT spectra is needed.
In this work, to partially bridge the gap for the five-level cascade system [16], we
develop a simple analytical method system under weak field limit of the probe light.
Linear susceptibility, absorption, and dispersion coefficients of the medium for the
probe light are derived in simple analytical forms.
Keywords: Electromagnetically induced transparency; Quantum interferences
68
P-15
EXPRESSION OF L-ASPARAGINASE GENE
IN ESCHERICHIA COLI
Thi Hien Trang Nguyen, Thi Tuyen Do, Dinh Thi Quyen*
Institute of Biotechnology, Vietnam Academy of Science and Technology
Email*: quyen@ibt.ac.vn
Abstract.
L-asparaginase (EC 3.5.1.1), which is an enzyme that catalyzes the hydrolysis of
asparagine to aspartic acid, are naturally occurring enzymes expressed and produced by
microorganisms. L-asparaginase of Escherichia coli or Erwinia chrysanthemi is a kind
of effective drug in the treatment of acute lymphoblastic leukaemia. The aim of this
study is to construct and clone a synthetic L-asparaginase gene with expression in E.
coli cells. The L-asparaginase gene based on L-asparaginase sequence (1044 bp) from
GenBank accession number X12746 was optimized and synthesized. Recombinant
plasmid pEaspg containing mature L-asparaginase gene (981 bp) encoding the mature
L-asparaginase (327 amino acid) without signal peptide and expression vector pET21a
with 6xhistidine tag was transformed in E.coli JM109. Under the control of strong
promoter T7 in the presence of isopropyl-β-D-1 thiogalactopynoside (IPTG) as inducer,
the expression level of recombinant L-asparaginase was estimated at about 70% of the
total cellular proteins by Dolphin program.
Keywords: Erwinia chrysanthemi; Escherichia coli JM109; L-asparaginase; IPTG.
69
P-16
FABRICATION OF ALIGNED AMORPHOUS SILICON CARBIDE
NANOROD ARRAYS BY ELECTROCHEMICAL ETCHING
Cao Tuan Anh*1, Luong Truc Quynh Ngan2, Dao Tran Cao2
1
2
Institute of Physic, 10 Dao Tan Str., Hanoi, Vietnam
Institute of Materials Science, 18 Hoang Quoc Viet Road, Hanoi, Vietnam
Email*: ctanh.iop@gmail.com
Abstract.
The aligned amorphous silicon carbide nanorod (aSiCNR) arrays were fabricated by
electrochemical etching. The results showed that the fabricated nanorods have the
diameter in the range of 100-200 nm and the length in the range of 500-1000 nm,
depending on the fabrication conditions. The further study showed that the HF
concentration in the electrolyte and anode current density strongly influenced the
morphology of the nanorods. The optical properties of the aforementioned aSiCNR
arrays have also been studied. The mechanism of the effect of fabrication parameters on
morphological and optical properties of the aSiC nanorods was also discussed.
Fig. 2. Plan-view and cross-sectional SEM images of the aligned aSiC nanorod
array which has been etched with 10 mA/cm2 anodic current density in an aqueous
HF solution.
70
P-17
FEASIBILITY STUDY OF - COINCIDENCE SPECTROMETER
FOR NEUTRON ACTIVATION ANALYSIS
AT DALAT REAEARCH REACTOR
P.D. Khang1, T.V. Minh*2, N. X. Hai3, P.N. Son3, H.H. Thang3
1)
2)
Nuclear training center, 140 Nguyen Tuan, Hanoi, Vietnam
The University of Dongnai, 04 Le Qui Don, Bienhoa, Dongnai, Vietnam
3)
Nuclear research institute, 01 Nguyen Tu Luc, Dalat, Vietnam
Email*: truongminhdnu@gmail.com
Abstract:
The coincidence spectrometer used a couple of HPGe detectors opposite to each other
for measurement of two-step cascade gamma-ray transitions has been developed at the
Dalat Nuclear Research Institute, Vietnam. This spectrometer is powered by a filter
technique that could reject most of unexpected gamma background and Compton
scattering effects. This instrument has been applied for experimental nuclear structure
researches and level density measurements. In this work, a feasibility study has been
performed with the aim to apply this coincidence spectrometer neutron-activation
analysis. The result of initial evaluation on the improvement of the peak to background
ratio and limit detection for element of 75Se and 76As in reference samples are reported.
Keywords: Neutron-activation analysis; Gamma–gamma coincidence
71
P-18
STUDY ON THE METHOD OF LIDAR DATA PROCESSING
Bui Thi Thanh Lan
Department of Physics – Faculty of Basics Science, University of Mining and Geology,
Dong Ngac, Tu Liem, Ha Noi, Viet Nam
Abstract.
The LIDAR data processing methods have been discussed for the exactly optical
parameters of atmosphere. One optical parameter has important role of the LIDAR
result is the LIDAR ratio. This parameter is considered as a constant in the Klett
methode. This methode has been considered as a common LIDAR processing method.
In this paper we present an discussion of study results about the LIDAR ratio. The result
has learned that the LIDAR ratio dependent on the aerosol concentration and other
atmospheric parameter. The two-stream technique has been introduced as one technique
to solve this situation.
72
P-19
Ge/HfO2 INTERFACE PASSIVATION BY SILICON
Nguyen Hoang Thoan*1, V. V. Afanas’ev2 and A. Stesmans 2
1
School of Engineering Physics, Hanoi University of Science and Technology, Hanoi, Vietnam
2
Department of Physics and Astronomy, University of Leuven (KU Leuven),
3001 Leuven, Belgium
Email*: thoan.nguyenhoang@hust.edu.vn
Abstract.
For Ge technology, it appears essential to have an oxide-free Ge before high-insulating
film deposition. In this study, we discuss the interface traps in Ge/HfO2 structures with a
thin Si/SiO2 interlayer as a passivation layer. The purpose of the Si-passivation is to
insert a Si/SiO2 interface into Ge/HfO2 gate stack to avoid oxidation of Ge occurring
when growing/depositing high-dielectric directly on Ge. For Ge/Si/SiO2/HfO2 gate
stack, low processing temperature may also help avoid diffusion of Ge through the
Si/SiO2 interlayer. Indeed, we will show that the interface trap density can be reduced
by approximately a factor of three on samples with silicon passivation deposited at 350
o
C, compared to those using silicon passivation deposited at 500 oC.
73
P-20
INFLUENCE OF INPUT PULSE ON THE COMPRESSION
EFFICIENCY OF THE SELF - COMPRESSOR CONSISTING
OF NONLINEAR COUPLER AND BACKWARD-PUMPED RAMAN
FIBER AMPLIFIER
Nguyen Manh An1, Chu Van Bien*1, Hoang Dinh Hai1, Ho Quang Quy2
1
2
Hongduc University, Thanh Hoa City
Academy of Military Science and Technology, Vietnam
Email*: chuvanbiendhhd@yahoo.com
Abstract.
The self-compressor consisting of the nonlinear coupler and backward Raman fiber
amplifier and the influence of Raman gain coefficient on the compression efficiency
have been investigated in previous work [1]. Together with the Raman gain, the input
pulse is a main factor influencing on the compressing effciciency. The influence of the
peak intensity and duration of the pulse on compressing efficiency are simulatelly
investigated. The results show the compressing efficiency increases with increasing of
the peak intensty and duration.
Key words: Backward Raman fiber amplifier, nonlinear optical coupler, Pulse
compression.
74
P-21
COMPLETE GROUP CLASSIFICATION OF SYSTEMS OF TWO
LINEAR SECOND-ORDER ORDINARY DIFFERENTIAL
EQUATIONS
G.F. Oguis*1, S. Moyo2, S.V. Meleshko1
1
School of Mathematics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima, 30000, Thailand
2
Durban University of Technology, Department of Mathematics,
Statistics and Physics Institute for Systems Science,
P O Box 1334, Steve Biko Campus, Durban 4000, South Africa
Email*: gfoguis@gmail.com
Abstract.
A complete group classification of the general case of linear systems of two secondorder ordinary differential equations excluding the case of systems which are studied in
literature is presented in this paper. An initial step in studying the nonlinear systems of
two second-order ordinary differential equations is also given. It can also be extended to
systems of equations with more than two equations. Lastly, the complete group
classification of a system of two linear second-order ordinary differential equations is
done and four cases of linear systems of equations with inconstant coefficients are
obtained.
75
P-22
NEW CARPAL TUNNEL SYNDROME TREATMENT METHOD:
THE APPLICATION OF LOW POWER
SEMICONDUCTOR LASER
Dinh Thi Thu Hong, Nguyen Thi Kim Yen, Tran Minh Thai
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email*: thithuhongdinh@yahoo.com
Abstract.
Carpal tunnel syndrome is a common disease in the community. Women who are from
35 to 60 years old are often defected than men. The common treatments are not high
efficiency. Therefore, we propose a new treatment to achieve perfect result. We use the
effect of simultaneous two wavelengths 780 nm and 940 nm to direct impact on
swelling wrist. A total of 60 patients who have been diagnosed with carpal tunnel
syndrome are examined. We randomly divide them into 2 groups. Group 1 (control
group): 30 patients are treated by ultrasound therapy. Group 2 (laser group): 30 patients
are treated by the effect of two simultaneous wavelengths. Depending on the results of
our research, we realize that when the effect of simultaneous two wavelengths 780 nm
and 940 nm directly interacts on swelling wrist, it reinforces blood microcirculation,
biological responses (anti-inflammatory, analgesic, regenerative …). The treatment with
low power semiconductor laser protects perfectly the function of tendon in wrist. The
recovering degree of group 2 is faster and better than that of group 1. During the
treatment process, we acknowledge no harmful side-effects on the health of patients.
This is the simple treatment and broad popularization.
76
P-23
OPTICAL PROPERTIES OF ERBIUM DOPED Sr6B5PO20
PHOSPHOR POWDERS PREPARED VIA CO-PRECIPITATION
METHOD
L. T. Ha*1, 2, N. D. T. Kien1, P. T. Huy1
1)
Advanced Institute for Science and Technology (AIST), Hanoi University of Technology
(HUST), 01 Dai Co Viet Street, Hanoi, Vietnam
2)
Thai Nguyen University of Science, Thai Nguyen, Vietnam
Email*: haletienvn@gmail.com
Abstract.
The Eu3+ and Eu2+-doped Sr6B5PO20 phosphor powders have been synthesized via coprecipitation method and subsequent reduction of the dopants in N2/H2 gas for tri-color
compact fluorescent lamps application in industry. The phosphor powders have
prepared with different concentrations of Eu ions. This co-precipitation method is
advantage to make the phosphor powders with uniform particle size and quite high
purity samples. The samples have been annealed from 600 to 1300 0C. The average
particle size of the phosphor powder was in the range of 100 nm to 1 m. It has been
found out that typical phases of Sr6P5BO20, Sr2P2O7, Sr3P2O8, and Sr3Eu(PO4)3 coexisted in the as-prepared powders. The strong red emission intensity from 570 to 700
nm in photoluminescence spectra of Sr6B5PO20:Eu3+ powders are attributed to the
5
D0→7Fj transitions of Eu3+ ion (where j gets the values of 1 to 6). The luminescence
emission peaks of Sr6B5PO20:Eu2+ powders in the range of 400 to 500 nm are attributed
to the 5d - 4f transitions of Eu2+ ion. The as-prepared phosphor powders would be
promising components for producting white light fluorescent lamps.
Keywords: Eu doped Sr6B5PO20, phosphor powder, co-precipitation method, fluorescent
lamps
Figure 2. XRD patterns of the
Sr6B5PO20:Eu2+ powders with different Eu
concentrations ranging from 2 to 5 %.
Figure 3. SEM images of Sr6P5BO20:
Eu powder samples at 1100 oC
sintering temperature.
77
Intensity (a.u)
600000
1%
2%
3%
4%
5%
9%
15%
400000
200000
0
400
500
600
700
Wavelength (nm)
Figure 3. Photoluminescence spectra of
Sr6P5BO20: Eu powder at room
temperature with different Eu ion
concentrations at 1100 oC sintering
temperature.
Figure 4. Photoluminescence spectra of the
Sr6B5PO20:Eu3+ powders with the Eu
concentrations of 2 % annealed at from 600
to 1300 0C under excitation of 393 nm.
78
P-24
OPTICAL PROPERTIES OF NANOPARTICLEDOPED
SOLIDSTATE DYE LASER MEDIUM
Nguyen Thi My An *, Vu Duong, Nghiem Thi Ha Lien,
Do Quang Hoa, Vu Thanh Thuy
Institute of Physics, 10, Dao Tan, Ba Dinh, Ha Noi, Viet Nam
Email *: ntmyan@iop.vast.ac.vn
Abstract.
Solid state dye laser medium doped gold nanoparticles in both spherical shape and coreshell form has been established. The gold nanoparticle ranging from 12 to 16 nm in
diameter and the core-shell of 40 nm in diameter to be uniformly dispersive gain in poly
(methyl methacrylate) matrix are formed by using slow vaporized method. Optical
properties of gain medium show that the energy transfer between dye and nanoparticles
not only modifies the peak wavelength of dye fluorescence spectra but associates
fluorescence enhancement or decreasing also. Higher monochromatic of laser emission
using conventional cavity is performance.
Solid-state dye lasers are known to operate in a wide range of wavelength. These lasers
are able to broad application in many fields such as spectroscopy, sensing, and
biomedical engineering etc. So far, a variety of laser medium structures have been
studied to increase working time of medium and efficiency solid-state laser. However,
the laser dyes doped to solid host are rapidly degraded in emission laser.
79
P-25
DEPENDENCE OF LIGHT REFLECTION SPECTROCOPY ON
MAGNETIC FIELD AND FERROMAGNETIC COMPONENT
IN Co-Ag GRANULAR MAGNETIC FILMS
Giap Van Cuong *1, 3, Nguyen Anh Tuan1, Nguyen The Binh2, Tran Trung3
1)
International Training Institute for Material Science (ITIMS) - Hanoi University of Science
and Technology; 1 Dai Co Viet Rd., Hai Ba Trung Dist., Hanoi, Vietnam
2)
Physics Department - Hanoi University of Science, Vietnam National University (VNU),
334 Nguyen Trai St., Thanh Xuan Dist., Hanoi, Vietnam
3)
Faculty of Basic Sciences, Hung Yen University of Technology and Education (UTEHY);
Khoai Chau, Hung Yen, Vietnam
Email*: cuonggiapvan@gmail.com
Abstract.
Nano-granular magnetic films of composition CoxAg1-x, where x is the volume fraction
ranging from 0.08 to 0.80, with a thickness of about 300-400 nm, have been prepared
using flash evaporation technique. Reflectance spectroscopy of the light with
wavelength in the visible region  = 380 - 680 nm have been studied in the absence and
the present of an external magnetic field. The results show that the reflectance R is
almost independent on wavelength when Co fraction x ≤ 0.12, but increased rapidly in
accordance with wavelength  when x ≥ 0.15, and appearance of peaks in two regions
of  ~ 570 and ~ 660 nm. When an external magnetic field with an intensity of 500 Gs
applies parallel to the plane of the film, for low-Co fractions, x ≤ 0.20, the reflectance of
Ag seems prominent; for x ~ 0.30 - 0.40 the reflectance of both Ag and Co are nearly
alike; and at high-Co fractions, x ≥ 0.50, the reflectance of Co trends superior. The
reason of the dependence on Co fractions and the effect of magnetic field of the visible
light reflectance spectroscopy has been discussed.
80
P-26
PREPARATION OF Au-Ag ALLOY NANOPARTICLES
IN LIQUIDS BY LASER ABLATION
Trong Duc Tran *, The Binh Nguyen, Quang Dong Nguyen,
Thu Hanh Nguyen Thi, Thanh Hang Nguyen Thi
Department of Physics, University of science, VNU HN
Email*: tranduc238@gmail.com
Abstract.
Using Nd:YAG laser we studied to produce Au-Ag Alloy nanoparticles in some liquids.
Separated Au and Ag nanoparticle colloids were created by laser ablation .The mixtures
of Au-Ag nanoparticles colloids with various molar ratios were irradiated by Nd:YAG
laser, with different exposure time and wavelengths. The morphology and optical
properties of Au-Ag alloy nanoparticles were observed by JEM 1010-JEOL
transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX)
and Shimadzu UV-2450 spectrometer. The experimental result showed the role of laser
influence, laser irradiation time, laser wavelength and molar ratios to the creation of AuAg alloy nanoparticles in solutions, which will be reported in this paper.
Keywords: alloy nanoparticles, laser ablation, plasmon resonance, laser influence.
81
P-27
PROPAGATION OF THE DIFFERENT WAVELENGTH LOW
POWER SEMICONDUCTOR LASER FROM THE BACK SKIN
TO THE LUNG: A MONTE CARLO SIMULATION STUDY
Mai Huu Xuan, Tran Thi Ngoc Hieu, Mai Le Minh, Tran Minh Thai
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email: quangdang_hv@yahoo.com.vn
Abstract.
The aim of this study is to carry out the propagation simulation of 633 nm, 780 nm, 850
nm and 940 nm low power laser from the back skin to the lung by Monte Carlo method.
Some primary parameters using in the simulation are listed below:
- The beam radius: 1.5 mm
- Number of photon: 100.000 particles
- Thickness of the simulation layers:
The skin layer: 3 mm
The under skin fat layer: 4 mm
The muscle layer: 4 mm
The lung membrane layer: 2 mm
From the simulation, we choose the 780 nm and 940 nm lasers in order to take
advantage of the effect of two simultaneous wavelengths to treat the lung lesion by the
laser propagation from the back skin to the lung.
82
P-28
SYNTHESIS OF rGO/Ag NANOCOMPOSITESVIA CHEMICAL
REDUCTION OF EXFOLIATED GRAPHITE OXIDE
I. Kotutha 1, 2 *, E. Sawatsitang 2 and S.Maensiri 1, 2
1
School of Physics, Institute of Science Suranaree University of Technology,
NakhonRatchasima, 30000, Thailand.
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, NakhonRatchasima 30000, Thailand
3
Physics Department, Faculty of Science, KhonKaen University, KhonKaen, 40002, Thailand.
Abstract.
Reduced graphene oxide/silver (rGO/Ag) nanocompositeshave been prepared by
reducing silver acetate 10 wt%, 15 wt% and 20wt% in the dispersed rGO (0.5 mg/ml) in
deionized water (DI) using glucose as reducing agent. The transmission electron
microscopy (TEM)was used to observe the morphologyof the as-prepared products.Xray diffraction (XRD) patterns showed the prominent peaks located at 38.39, 44.55,
64.70, and 77.60 which were assigned to the (111), (200), (220), and (311)
crystallographic planes of silver nanoparticles, respectively.Raman spectroscopy
indicated thatthe ratio of ID/IG increased after the reduction of GO to rGO/Ag. Fourier
transform infrared spectroscopy (FTIR) confirmed the efficient removal oxygencontaining groups.
83
P-29
RESEACH ON THE FLUENCE OF PARTICLE SIZE
TRISUNFUA ANTIMONY ON THE KALIPERCLORATLEADCROMAT-NITROXENLULO PYROTECHNIC SYSTEM
Doan Anh Phan 1, 2*, Ngo Van Giao 1 and Tran Minh Cong1
1
Chemical Institute, Academy of Science and Technology Army,
17 Hoang Sam street, Cau Giay district, Ha Noi capital, Viet Nam
2
Institute of Propellant and Explosive
192 Duc Giang street, Long Bien district, Ha Noi capital, Viet Nam
Email *: doanphan74@gmail.com
Abstract.
This paper presents the results of initial studies on the effect of particle size
inflammable material (Sb2S3) with oxidizers (KClO4, PbCrO4) and binder (NC) to
physicochemical parameters, burning rate of pyrotechnic and provides these
effect‟relationships
84
P-30
FIRST PRINCIPLES STUDY OF OXYGEN SUBSTITUTIONAL
DEFECT IN GROUP III NITRIDES
Nirawith Palakawong 1, 2*, Jiraroj T-Thienprasert 3 and Sukit Limpijumnong 1, 2
1
School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional
Nanomaterials, Suranaree University of Technology, NakhonRatchasima 30000, Thailand
2
Thailand Center of Excellence in Physics, Commission on Higher Education,
Bangkok 10400, Thailand
3
Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
Email*: nirawith@gmail.com
Abstract.
Group III-nitride materials have been widely studieddue to their suitable properties for
numerous applications, especially for optoelectronic devices.Light impurity elements,
especially oxygen, can easily incorporate into these materials during growth. They can
strongly affect materialproperties. Due to a comparable in size, an oxygen atom prefers
to substitute forthe nitrogenin this class of materials andacts as a donor defect. In this
work, we employed first-principles calculations based on density functional theory
(DFT) within the local density approximation (LDA) as well as the generalized gradient
approximation (GGA) as implemented in the Vienna ab initio simulation package
(VASP), to systematically study the oxygen substituted for nitrogen (ON) defect in AlN,
GaN and InN. The defect local structures, formation energies, and defect stateswere
investigated. In order to compare the band positions between different compounds, the
band alignment method is carried out to align the band positions for each compound
with the universal reference, i.e., vacuum level.
Keywords: First-principles calculations, Density functional theory, III-Nitride, Defect
Figure 1. Illustration of valence-band maximum (VBM), conduction-band
minimum (CBM) and defect transition level (ε(+/0)) with respect to the vacuum
level for AlN, GaN, and InNcalculated by using (a)LDAand (b) GGA for the
exchange-correlation energy.
85
P-31
STUDYING GAMMA CASCADE DECAY OF 59Ni
ON THERMAL NEUTRON REACTION
Nguyen An Son1, Pham Dinh Khang2, Nguyen Duc Hoa1,
Nguyen Xuan Hai2, Nguyen Thi Minh Sang1
1
2
University of Dalat, Lam Dong, Vietnam
Vietnam Atomic Energy Institute, Hanoi, Vietnam
Email: sonnguyendlu@yahoo.com
Abstract:
The quantum properties are important issues when studying the nuclear structure.
The quantum properties such as energy, spin, parity, multiple order are usually
researched. In this work, we investigate 58Ni by Niken natural sample that is
activated by thermal neutron at 3rd horizontal channel of Dalat Reactor. The
experimental system is gamma-gamma coincidence which gets data by event –
event method. The experimental result showed gamma two-step cascades energy,
relative intensity, spin and parity of level, electromagnetic transition probabilities of
59
Ni by 58Ni(nth, 2)59Ni reaction.
Keywords: AX (nth, 2) A+1X reaction; quantum property.
86
P-32
CHARACTERISTICS OF Mo-Au AND Cu MINERALIZATION
IN PHA KIENG-NAM BO AREA, MUANG LONG, LAO PDR
Khoanta Vorlabood*, Tran Thanh Hai, Tran Binh Chu
Hanoi University of Mining and Geology, Tu Liem, Hanoi, Vietnam
Email*: khoanta@yahoo.com
Abstract.
Pha Kieng-Nam Bo area is located in the Muang Long District, Luong Nam Tha
Province, Lao PDR. It is part of the Sukhothai tectonic belt a tectonic entity underlain
by Silurian-Permian sedimentary-volcanic complexes that have undergone a
complicated tectonic history. The area hosts numerous copper (Cu) and molybdenumgold (Mo-Au) showings, some with significant economic potential. Cu and Mo-Au
mineralizartions are generally hosted by strongly fractured and/or high sheared mafic to
intermediate volcanic rocks. Two main types of mineralizations in the Pha Kiang-Nam
Bo have been distinguished including molybdenum-gold and copper-base metal
mineralizations. Hydrothermal alteration associated with Cu and Mo-Au mineralizations
in the Pha Kiang-Nam Bo are extensive, which is characterized by phyllic and propylitic
alterations. The alteration patterns are indicative of the low sulfidation character for the
epithermal mineralizations.
Key word: Pha Kieng-Nam Bo, Cu-Mo-Au mineralization, hydrothermal alteration,
mineralization.
Figure 1. Location of Pha Kiang- Nam Bo area (red box) in Muang Long district,
Luang Nam Tha province, northwest of Lao PDR. The area locates within the
Sukhothai fold belt (after Phommakaysone, 2011 [8]).
87
P-33
THE EFFECTIVE DIFFUSIVITIES
OF BORON AND POINT DEFECTS IN SILICON
Vu Ba Dung*1, Dinh Van Thien1, Vu Dung Le2 and Dao Thi Trang3
1
Hanoi University of Mining and Geology, Viet Nam
2
The Nanyang Technological University, Singapore
3
Hanoi National University of Education, Viet Nam
Email*: vubazung305@gmail.com
Abstract:
Dopant diffusion in semiconductors is an interesting phenomenon from both
technological and scientific points of view. Firstly, dopant diffusion is taking place
during most of the steps in electronic device fabrication and, secondly, diffusion is
related to fundamental properties of the semiconductor, often controlled by intrinsic
point defects: self-interstitials and vacancies. Due to the interaction between dopant
with the crystal lattice, the dopant diffusion process in silicon often gives rise to point
defects, which will diffuse simultaneously with the impurities. So the diffusion process
and diffusivities of dopant and point defect are very complex. Based on irreversible
thermodynamic theory, the effective diffusivity of boron, interstitial and vacancy in
silicon are presented and discussed. The effective diffusivity of point may be negative
and diffusion of point defect in silicon could be backward diffusion. In this paper, the
depending of diffusivity of boron and point defect on simple diffusivity and
concentration of boron and point defect are researched.
88
P-34
ELASTIC PARAMETERS OF PbTiO3
FROM FIRST PRINCIPLES CALCULATIONS
Narasak Pandech1, 2*, Kanoknan Sarasamak3 and Sukit Limpijumnong1, 2
1
School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional
Nanomaterials, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
2
Thailand Center of Excellence in Physics (ThEP Center), Commission on Higher Education,
Bangkok 10400, Thailand
College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang,
Bangkok 10520, Thailand
3
Email*: na_ra_suk@hotmail.com
Abstract.
Most of material properties (physical, electronics, magnetics and optical) can be studied
based on the quantum mechanics calculations of the interactions between electrons and
the electronic potential from the nuclei of the atoms in the material. Such calculations
are called first princples calculations. In principle, one need to solve a complicated set
of Schrödinger equations of a many-body system. In practice, various approximations
have to be applied in order to make the computation feasible. Yet, the properties
obtained are still reasonable. With today computing technology, properties of
complicated crystalline compounds such as perovskite PbTiO3 (PTO) can be study by
first principles calculations using personal PC. In this presentation, we will show how
the crystal parameters (the lattice constant and other internal lattice parameters) as well
as elastic parameters of PTO can be calculated. Our results are in good agreement with
previously reported experimental and computational results. In addition, we will show
how the elastic parameters can be used to calculate sound velocities of PTO. If time
permits, the extension of the calculations to study the elastic parameters and sound
velocities under pressure will be presented.
Keywords: PbTiO3, perovskite, elastic constants, first principles.
89
P-35
THE RESPONSE OF MUON-INDUCED BACKGROUND ON
HPGE AND PLASTIC SCINTILLATION DETECTORS
IN COINSIDENCE BY GEANT4 SIMULATION
Nguyen Quoc Hung*1, Vo Hong Hai1, Do Minh1, Nguyen Ngoc Lam2
1
Faculty of Physics & Engineering Physics, University of Science-VNU-HCM
2
Nuclear Techniques Laboratory, University of Science-VNU-HCM
Email*: nqhung@hcmus.edu.vn
Abstract.
In this article, we study the response of the muon-induced background on a High Purity
Germanium (HPGe) detector using Geant4 simulation toolkit. Detection system
consideration includes HPGe detector positioned inside a lead chamber and a plastic
scintillation plate placed upper the chamber. A simulation program based on the Geant4
toolkit has been developed to simulate the coincident response of a plastic scintillator
and the HPGe detector to the cosmic-ray muons which have the angular and energy
distributions at the sea level. Obtained coincident spectra of both detectors are presented
and discussed in detail.
Keywords: Geant4 simulation, HPGe detector, plastic scintillation detector, muon
90
P-36
THE STUDY OF SINGLE-ELECTRON TRANSISTOR VIA THE
SIMULATION OF CURRENT-VOLTAGE CHARACTERISTICS
BY USING NON- EQUILIBRIUM GREEN FUNCTION METHOD
Le Hoang Minh
Faculty of Electrical and Electronics Engineering,
University of Technical Education of Ho Chi Minh City,
Vo Van Ngan Str. 1; Thu Duc District, Ho Chi Minh City
Email: minhlehoang.feee@gmail.com
Abstract.
This paper presents the simulations for the study of single-electron transistor. The
operation of single - electron transistor is based on the transfer of each single electron
via tunnel by using the effect of Coulomb blockage. Physics - based simulation of
electron transport in nanoelectronic devices requires the solution of highly complex
equations. Non equilibrium Green's function methods are regularly used to calculate
current in nanoscale, and it were used to solve the transfer function in this simulation.
Coulomb oscillation, current - voltage characteristic of the single-electron transistor, the
effects of capacitance, bias and temperature were also studied.
Keywords: Single-electron transistor, non-equilibrium Green function, current- voltage
characteristic, Coulomb blockage, Coulomb oscillation.
91
P-37
EVALUATION OF EFFECTIVE EMISSIVITY OF
A CYLINDER - INNER - CONE BLACKBODY SIMULATOR
CAVITY
Nguyen Quang Minh* and Ta Van Tuan
Center for System Engineering and Integration (CSEI) - National Center for Technological
Progress (NACENTECH) - Vietnam
Abstract.
A Cylinder-inner-cone blackbody simulator cavity suitable for non-uniformity
correction of certain infreared imagers is under design at CSEI - NACENTECH. To
characterize such a blackbody simulator, the effective emissivity of a predefined
geometrical cavity configuration is evaluated by determistic calculation method and
computerized Monter Carlo modeling. The results obtained in the evaluation process are
able to optimize the cavity design parameters.
92
P-38
COMPLETE GROUP CLASSIFICATION OF THE EQUATION
FOR GENERATING FUNCTION OF THE BOLTZMANN
EQUATION WITH SOURCES
Amornrat Suriyawichitseranee*1, Yurii N. Grigoriev2** and Sergey V. Meleshko1
1
School of Mathematics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima, 30000, Thailand
2
Institute of Computational Technology, Novosibirsk, 630090, Russia
Email: *amornrat@math.sut.ac.th, **grigor@ict.nsc.ru
Abstract.
The Boltzmann kinetic equation is the basis of the classical kinetic theory of rarefied
gases. Considerable interest in the study of the Boltzmann equation was always the
search for exact (invariant) solutions directly associated with the fundamental properties
of the equation. Lie symmetries of the spatially homogeneous and isotropic Boltzmann
equation with sources were first studied by Nonnenmacher [1]. In fact, he considered
the associated equations for the generating function of the power moments of the
unknown distribution function. However, it was not taken into account that this
equation is still a nonlocal partial differential equation. In the present project their Lie
symmetries are studied using the original approach developed by Grigoriev and
Meleshko [2] for group analysis of equations with nonlocal operators, which allows us
to correct Nonnenmacher's results. The group classification with respect to sources is
carried out for the equations under consideration using the algebraic method.
93
P-39
THERMAL DECOMPOSITION STUDIES
ON CAST MIXTURE OF TNT AND RDX
Nguyen Mau Vuong*1, 2, Ngo Van Giao
1
Chemical Institute, Academy of Science and Technology Army,
17 Hoang Sam street, Cau Giay district, Ha Noi capital, Viet Nam
2
Institute of Propellant and Explosive
192 Duc Giang street, Long Bien district, Ha Noi capital, Viet Nam
Email*: tptnvuong@gmail.com
Abstract.
This paper presents studies on the thermal decomposition of explosive mixture
composed of 2, 4, 6-trinitrotoluen (TNT) and cyclotrimethylentrinitramin (RDX),
otherwise known as TГ explosive mixture. On the basis of method of differential
thermal analysis (DTA), we determined the melting point, endothermal heat, exothermal
heat, decomposition and calculated kinetic parameters (activation energy, frequency
factor, reaction rate constant) of explosive mixture when changing its component ratio.
These data were collected as a basis for establishing the components, determining cast
technology mode reasonably to products used in civil life and army.
94
P-40
USING MODIS IMAGES TO DETERMINE THE SALINITY OF
THE SOIL IN NAM DINH PROVINCE
Nguyen Dinh Tai
Center for Environmental Physics, Institute of Physics, 10 Dao Tan Street, Hanoi
Email: ndtai@iop.vast.ac.vn
Abstract.
At present, remote sensing techniques are widely used to monitor the Earth's surface
and study its characteristics. In this research, a method for detection of soil salinity led
to the arid cropland was proposed. The accuracy of this approach is tested with the
values measured directly in the field in Giao Thuy district, Nam Dinh province.
Eighteen spectral indicators of MODIS imagery was used to extract the characteristics
of soil salinity. Linear Spectral Unmixing technique (LSU) was also applied to increase
the precision the final results. On the basis of determining the correlation between the
electrical conductivity and the spectral index, soil salinity map is generated by using the
linear regression method based on the best correlation index. Standard error of this
method is estimated to be around 12.1 μS cm-1.
95
P-41
RETRIEVALS OF AEROSOL OPTICAL DEPTH FROM MODIS
IMAGERY AND VALIDATION WITH AERONET DATA
Nguyen Dinh Tai
Center for Environmental Physics, Institute of Physics, 10 Dao Tan Street, Hanoi
Email: ndtai@iop.vast.ac.vn
Abstract.
Aerosols are one of those important geophysical parameters that to address aerosol
climatic issues at global scale and a great scientific interest in a variety of applications
related to global warming and climate change. An understanding of the amount and type
of aerosols present in the atmosphere is required for the atmospheric correction of
satellite imagery. The aerosol optical depth (AOD) retrieved using MODerate
Resolution Imaging Spectroradiometer (MODIS) data can be used as a reliable proxy of
air pollutants measured near the surface depends on meteorological influence. Aerosol
retrieval algorithms for MODIS have been developed to estimate aerosol and
microphysical properties of the atmosphere. This study described an aerosol retrieval
algorithm using the MODIS to retrieve aerosol properties at 0.55 μm resolution over
land. The results of MODIS AOD are highly correlated (r =0.81076) with AErosol
RObotic NETwork (AERONET) sunphotometer observations.
96
P-42
TUNNELING CONDUCTANCE OF A METAL AND
A TWO-DIMENSIONAL ELECTRON GAS WITH RASHBA AND
DRESSELHAUS SPIN - ORBIT COUPLING
A. Ka-oey*1, 2, P. Pairor1, 2
1
1
School of Physics, Institute of Science, Suranaree University of Technology
Nakhon Ratchasima, Thailand
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, NakhonRatchasima 30000, Thailand
Email*: t_taro23@hotmail.com
Abstract.
We theoretically studied the transport of electrons in a metal and a two-dimensional
electron gas with Rashba and Dresselhaus spin-orbit coupling (RDSOC) junctions. We
used the scattering method to calculate a tunneling conductance as a function of applied
voltage. We found that the RDSOC energy can be extracted from the energy range
between the beginnings spectrum to the second discontinuity point in conductance
m
spectrum which can be defined as e (k0  0 ) 2 . We also found some energy scale
mRD
( E ) from the energy range between the first and second discontinuity point in
conductance spectrum which can be defined as
me
( k0   0 ) 2 .
mRD
Keyword: Rashba spin-orbit coupling, Dresselhaus spin-orbit coupling, tunneling
conductance, RDSOC energy.
97
P-43
EFFECT OF DENSITY AND SIZE OF THE SILVER
NANOPARTICLES, WHICH WERE DEPOSITED ONTO THE
SiNW ARRAYS ON THE SERS MEASUREMENTS
Luong Truc Quynh Ngan*1, Dao Tran Cao1, Cao Tuan Anh2,
Nguyen Nhu Duong1 and Le Van Vu3
1)
Institute of Materials Science, 18 Hoang Quoc Viet Road, Hanoi, Vietnam
2)
3)
Institute of Physics, 10 Dao Tan Road, Hanoi, Vietnam
Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi, Viet Nam
Email*: nganltq@ims.vast.ac.vn
Abstract.
In this report we present studies on the effects of density and size of the silver
nanoparticles (AgNPs), which were deposited onto the silicon nanowire (SiNW) arrays,
on the surface-enhanced Raman scattering (SERS) measurements. The aligned SiNW
arrays were fabricated on the Si substrate and the AgNPs were deposited on the SiNW
arrays via immersion of SiNW arrays in the HF/AgNO3 solution. The results showed
that the density and size of AgNPs have a strong influence on the Raman enhancement
factor, especially with the appropriate density and size of AgNPs, low concentrations of
malachite green, down to about 10-13 M, can be detected.
98
O-19
CHARACTERIZATION OF NANOSTRUCTURED MATERIALS
AND NANODEVICES
Dr Ramdane BENFERHAT
HORIBA Scientific
Abstract.
Nanoscience has attracted much attention due to the unique physical properties and
potential applications such as electronic components, catalysts, sensors, biomarkers, and
energy harvesters [1-5]. Among several characterization methods in nanoscience field,
MicroRaman spectroscopy is widely used and well known for providing useful
information on the nanostructred material„s properties in a non destructive way.
Nano-structured materials‟ properties are of great importance for device performance.
The crystallinity, composition, doping, stress and defects, which drive the electrical and
optical properties of the materials are derived from different optical techniques, like
Raman
Spectroscopy,
Fluorescence,
Spectroscopic
Ellipsometry
and
Photoluminescence. Benefiting from the latest developpement in optical spectroscopy
and micro characterization, isolated single nanowire, nanotube or nanobelt or graphene
can be analyzed easily.
In this lecture we will review the latest development in Optical Spectroscopy techniques
to the characterization of nanostructured materials and nanoscaled devices.
99
O-20
RESEARCH AND DEVELOPMENT OF THE 1D MODEL
FOR THE WIRELESS POWER TRANSMISSION PROBLEM
USING MICROWAVE BEAM FROM GEO TOTHE EARTH
Phan Anh Tuan* and Dao Khac An
Materials and Devices Energy Lab., Institute of Materials Science (IMS), VAST
18 Hoang Quoc Viet Road, Cau Giay, Ha Noi, Vietnam
Email*: tuanap@ims.vast.ac.vn(cc. andk@ims.vast.ac.vn)
Abstract.
Currently the problem of developing sustainable energy sources is an urgent one.
Scientists have been searching intensively for new sources of clean energy; one of
which is Space Solar Power (SSP) and Wireless Power Transmission (WPT) from
Geostationary Earth Orbit (GEO) to the Earth surface (Fig.1.a). This energy source, so
called solar electricity, is a very promising sustainable energy source. So far, a lot of
research activities have been focused on this avenue and some has obtained many
impressive results, but in general the research is still faced with many difficulties and
challenges. One of these difficulties is searching and finding the solution of the problem
of wireless power transmission (WPT) by microwave beam or laser power beam
through an attenuating, inhomogeneous, nonlinear and anisotropic medium composed of
outer space and Earth‟s atmosphere to Earth‟s surface. This paper discusses briefly
about principle of Wireless Power Transmission using high power microwave beam
and the problem of WPT describing by Maxwell equation system as well as some main
influence factors of environment for WPT from GEO to Earth‟s surface, then the paper
outlines some research and developments of a simple one dimension(1D) model of
Wireless power transmission problem (Fig.1b) that includes some main features
concerning the microwave energy flux expression for WPT together with certain
constraint conditions as well as initial and boundary conditions. The analysis and
estimations of the solution method for 1D problem model will also be discussed
b)
a)
Figure 1. The principle of Wireless Power Transmission (WPT) from GEO to the
Earth (a) and development of 1D Model of the WPT problem (b).
100
O-21
ANTIMICROBIAL ACTIVITY OF RED AND VIOLET PIGMENTS
FROM LOCALLY ISOLATED BACTERIAL STRAINS
Claira Arul Aruldass1*, Ponnusamy Yasodha2, Surash Ramanathan2,
Wan Azlina Ahmad1
1
Department of Chemistry, Faculty of Science,
Universiti Teknologi Malaysia, 81310 Skudai, Johor
2
Centre for Drug Research, Universiti Sains Malaysia, 11800 Minden, Penang
Email*: ruth23_arul@yahoo.com
Abstract.
Bacterial pigments, notably red and violet pigments are produced by Serratia
marcescens and Chromobacterium violaceum, respectively. These pigments display a
broad range of interesting biological properties namely antibacterial antiproliferative
and immunosuppressive activities. However, reports on pharmacological activities of
these two pigments from Malaysian isolates are limited. In this study, red and violet
pigments were extracted from locally isolated Serratia marcescens UTM1 and
Chromobacterium violaceum UTM5. Both pigments were evaluated for their
antimicrobial activities against selected pathogenic strains; Staphylococcus aureus,
methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella
pneumoniae and Candida albicans. Red and violet pigments displayed antimicrobial
activity with low minimum inhibition concentration (MIC) using microdilution method.
However, their effects were slightly less potent as compared to standard antibiotics. The
MIC values for both pigments ranged from 0.0078 mg/mL to 1 mg/mL, particularly
violet pigment revealed promising antibacterial efficacies against Staphylococcus
aureus and methicillin-resistant Staphylococcus aureus (MRSA) that were only 10
times less potent than standard antibiotic, vancomycin. However, both pigments did not
show antifungal activity against Candida albicans. Minimum bactericidal/bacteriostatic
concentration (MBC) for red and violet pigments ranged from 0.03125 mg/mL to 1
mg/mL. Further work on the role of violet pigment as antibacterial agent will be looked
into considering the fact that it has potential to control methicillin-resistant
Staphylococcus aureus (MRSA) occurrence.
101
O-22
DETERMINATION OF AERODYNAMIC CHARACTERISTICS
OF FLYING VEHICLES USING METHOD OF LARGE EDDY
SIMULATION WITH ANSYS.CFX
Le Tuan Anh*, Phan Tuong Lai, Nguyen Thanh Binh
Vietnam Academy of Military Science and Technology
Email*: hanoixa@yahoo.com.
Abstract:
Nowadays, together with the huge development of information technology, the use of
numerical method is no longer an obstacle. It provides a lot of advantages such as high
precise solutions, reduced time and costs of design and manufacturing of flying
vehicles. It helps dealing with extremely complex problems by using physical models
compared to the traditional analytical methods. Operation of airplanes represents a
critical aerodynamic problem due to the wing-ground. This article presents a method in
which aerodynamics coefficients of isolate wing of flying vehicles will be identified by
using software ANSYS.CFX. Numerical results will subsequently be compared to that
of analytical method.
Keywords: Aerodynamic characteristics, Wing, Airfoil Section, angle of attack.
Figure 1. The model profile of isolate wing for simulating.
102
O-23
ZINC OXIDE NANOWIRES SYNTHESIZED BY THEMAL
EVAPORATION METHOD WITH AND WITHOUT CATALYST
Syahida Suhaimi*1, Samsudi Sakrani1, Tashi Dorji1, Peshawar O. Amin2
1
Department of Physics, Faculty of Science, Universiti Teknologi Malaysia,
81310 Johor Bahru, Malaysia
2
Department of Physics, School of Science Education,
University of Sulaimani, Sulaimani, Iraq
Email*: samsudi3@yahoo.com
Abstract.
The fabrication of zinc oxide nanowires and their characterization are presented in this
paper. Gold catalyst was employed on certain set of experiments. The sample were
fabricated within a horizontal quartz tube under controlled supply of O2 and Ar gases
and heated at 700oC up to 1200oC. Initially, the tube was evacuated around 1 torr using
a mechanical pump and the gas is allowed to pass at a known flow rate so that the
evaporated source will be driven to the Silicon substrate. The substrate was previously
cleaned and deposited with gold nanoparticles using a dipping process to act as a
catalyst during vapor-liquid-solid mechanism. Another set of samples was prepared
without the aid of gold catalyst and the process involved is called self-catalytic growth.
The structural morphology of both catalyst and catalyst-free samples was characterized
using scanning electron microscopy and field emission scanning electron microscopy,
whilst the field emission properties of the nanowires were measured using
photoluminescence spectroscopy at room temperature. Both SEM and FESEM results
showed that the optimal conditions for the growth of ZnO nanowires with gold catalyst
were as follows: Flow rate at 5 sccm, 90 mins growth time and substrate‟s tilt angle
between 0o to 30o. Low aspect ratio of around 7.0 and low surface density were also
observed. The corresponding PL spectrum was found to be reasonably good when the
argon flow rates were set between 1.1 sccm to 5 sccm, and these results confirmed the
existence of ZnO nanowires with a dominant of blue emission. Catalyst-free ZnO:Al
nanowires showed a randomly orientated nanowires with varying nanostructures as the
dopant concentrations were increased from 1.6 to 3.0 at%. Interesting features were
observed at 2.4 at%, shown by a perfect hexagonal similar to „pencil-like‟ shape. This
was further analysed by EDX which confirmed an optimal level of dopant concentration
for the synthesis of ZnO:Al nanorods. The measured diameters were roughly between
260 to 350 nm and the length about 720 nm. From HRTEM image of the corresponding
nanorods the fringes were about 0.51 nm wide, an equivalent to the lattice constant of
ZnO and corresponds to the (0001) fringes with regard to the growth direction. The as
prepared ZnO:Al samples exhibited a strong UV emission band located at ∼389 nm
(Eg=3.19 eV), with multiple other low intensity peaks appeared at wavelengths greater
than 400 nm contributed by oxygen vacancies. The results showed the importance of Al
doping that played an important role on the morphology and optical properties of ZnO
nanostructures. This may led to potential applications in sensor and biological
applications.
103
O-24
STUDY ON EXTRACTION AND PURIFICATION OF LONG
CHAIN POLYUNSATURATED FATTY ACIDS FROM
HETEROTROPHIC MARINE MICROALGA
SCHIZOCHYTRIUM MANGROVEI PQ6
Dinh Thi Ngoc Mai, Le Thi Thom, Nguyen Cam Ha, Luu Thi Tam, Hoang Thi Lan
Anh, Ngo Thi Hoai Thu, Hoang Thi Minh Hien, Dang Diem Hong *
Institute of Biotechnology, Vietnam Academy Science and Technology
Tel: 04.3.7911059; E-mail*: ddhong60vn@yahoo.com
Abstract.
Microalgae offer potential for numerous commercial applications, among them the
production of omega-3 and omega -6 long chain polyunsaturated fatty acids (omega-3
and omega-6 LCPUFAs). These valuable fatty acids are important for a variety of
nutraceutical and pharmaceutical purposes, and the market for these products is
continually growing. This work aims to extract and purify LCPUFAs, especially
docosahexaenoic acid (DHA; C22:6 omega-3) from heterotrophic marine microalga
Schizochytrium mangrovei PQ6 which was isolated from Phu Quoc Island, Kien Giang
province, Vietnam. This microalga was grown in 150-L fermentor to supply enough
biomass for lipid extraction. The cell density, dry cell weight and total lipid were 125.51
x 106 cells/mL, 30.31 g/L and 70.56 % of dry cell weight after 96 h of cultivation,
respectively. The process producing free fatty acid (FFA) from total lipid resulted in a
yield of 90% based on algal lipid. A simple procedure involving urea complexation and
winterization has been developed in order to separate the total fatty acids into a first
fraction enriched with saturated fatty acids and a second one enriched with LCPUFAs.
The obtained LCPUFAs fraction accounted for 30% by weight of total fatty acids and
contains a high content of DHA (reaching 69% of total fatty acids).
Keywords: DHA, heterotrophic marine microalga, lipid, long chain polyunsaturated
fatty acid, Schizochytrium mangrovei
104
O-25
FORMATION OF COPPER NANOPARTICLE
FROM ELECTRODIC REACTION BY HIGH VOLTAGE
Nguyen Duc Hung, Nguyen Thanh Hai, Bui Ngoc Duong, Vo Thanh Vinh
Institute for Materials and Chemistry, 17- Hoang Sam – Cau Giay – HaNoi
Email: nguyenduchung1946@gmail.com
Abstract.
The copper metal nano solution is being paid attention to research, modulate due to the
bactericidal effects and treating relatively environmental pollution but its cost is cheaper
than nano silver solution. Using the anodic dissolution reaction by DC high-voltage can
be combined simultaneously with the creation of hydrogen oxidation on plasma cathode
and electrolyte at the electrodes to carry out chemical reactions in the heart of the
solution to create nano metal. The shape, the size of the nano copper was determined by
TEM and particle size distribution, the concentration was determined by AAS, the loss
of anodic weight and calculated according to Faraday's law of current electrode
reaction.
Keywords: DC high-voltage, copper nanoparticle, plasma electrolysis, nano solution,
electrodic plasma.
105
O-26
THE LUMINESCENCE OF Er3+/ Nd3+ CODOPED WITH
LITHIUM NIOBATE TELLURITE GLASS
Nurhafizah H.*, Rohani M. S., Sahar M.R., Ghoshal S.K.
Advanced Optical Material Research Group, Faculty of Science,
Universiti Teknologi Malaysia, Skudai, 81310, Johor
Email*: nurhafizah1989@gmail.com
Abstract.
Lithium Niobate based glass with rare earth codoping is an attractive as lasing material.
A series of tellurite glasses of composition (70-x-y) TeO2 – 15 Li2CO3 – 15 Nb2O5 – (x)
Er2O3 – (y) Nd2O3 codoped Er3+/ Nd3+ with (x = 0 mol % and 1.0 mol %) (0 mol % ≤ y
≤ 1.0 mol %) have been made by using melt quenching technique. From the
luminescence spectra, the up conversion is observed when strong red emission occurs at
the transition from 4F9/2 4I9/2 which correspond to the intensity around 633 nm. Figure
1 shows typical upconversion emission spectra of (70-x-y) TeO2 + 15 Li2CO3 + 15
Nb2O5 + (x) Er2O3 + (y) Nd2O3 glass system with the increase of neodymium in the glass
system. From the figure, there are seven distinctive emission spectra centered at 438
nm, 464 nm, 499 nm, 537 nm, 566 nm, 616 nm and 633 nm which are assigned to the
transition of Er3+: 4F5/2, 4F7/2, 2H11/2, 4S3/2 and 4F9/2, together with the transitions of Nd3+:
2
P1/2, 2G11/2, 2G9/2, 2G7/2, 2H11/2 and 4F9/2. From these emission bands, it should be noticed
out possibility of orange and red emissions occur. The 2H11/2 4I9/2 transition is
corresponding to a strong orange emission band at 616 nm whereas a strong red
emission band is observed at 633 nm which is due to 4F9/2 4I9/2 transition. Obviously,
the 2G9/2 4I9/2 and 4F9/2 4I9/2 transitions are the most intense emission spectra in
visible and near infrared upconversion spectral region which has been observed. A
possible mechanism for the luminescence spectra upon the excitation 725 nm for the
(70-x-y) TeO2 + 15 Li2CO3 + 15 Nb2O5 + (x) Er2O3 + (y) Nd2O3 glass system with the
increase of neodymium can be drawn and shown in Figure 2. As depicted in energy
diagram in Figure 2, it is believed that the upconversion excitation of Er3+ is dominated
by the excited state absorption (ESA) where the ions in 2H11/2 level relax directly to the
ground state 4I9/2 by radiatively emitting strong orange emission spectra centered at 616
nm and some of Nd3+ ions are found relax nonradiatively to 4F9/2 level while emitting
strong red emission spectra centered at 633 nm. The dominant emission of (70-x-y)
TeO2 + 15 Li2CO3 + 15 Nb2O5 + (x) Er2O3 + (y) Nd2O3 glass system is red emission
which can be seen from Figure 4.16, had a higher intensity peak. Therefore, the red
emission dominant intensity is plot as shown in Figure 4.18. It shown that as the mol
percentage of Nd2O3 increases, the intensity of the dominant red emission is decreases
non – systematically. The reduction is due to luminescence quenching. There are two
important mechanisms explaining the energy transfer (ET) processes resulting in
106
luminescence quenching where the first mechanism is attributed to the cross relaxation
between the pairs of Nd3+ ions which can be seen in the energy level diagram in Figure
3. The second mechanism is connected with the migration of excitation energy which
accelerates the decay of Nd3+ ions by energy transfer to the structural defects which can
acts as energy sinks. At a very low concentrations of Nd dopant ions, the interaction
between optically active Er3+ and Nd3+ ions is negligible (Selvaraju et.al., 2013). From
the graph in Figure 1 it can be concluded that the (68.6) TeO2 + 15.0 Li2CO3 + 15.0
Nb2O5 + (1.0) Er2O3 + (0.4) Nd2O3 glass had the highest intensity of red emission where
is a good candidate to used in application in photonic as well as other applications that
is suitable with the glass itself.
Fig.1: Luminescence spectra of under
725 nm excitation.
Fig. 3: Red emission dominant
intensity dependence on molar
percentage of Nd2O3.
Fig. 2: Energy level
schemes of Er3+ and
Nd3+ with relative
transitions and energy
transfer
processes
between Er3+ and Nd3+.
107
O-27
EFFECT OF BICARBONATE CONCENTRATION ON
ASTAXANTHIN ACCUMULATION OF GREEN MICROALGA
Haematococcus pluvialis
Luu Thi Tam, Dinh Thi Ngoc Mai, Hoang Thi Lan Anh, Ngo Thi Hoai Thu,
Hoang Thi Minh Hien, Dang Diem Hong*
Institute of Biotechnology, Vietnam Academy of Science and Technology
Tel: 04.3.7911059; Email*: ddhong60vn@yahoo.com
Abstract.
A green microalga Haematococcus pluvialis is the current best source of natural
astaxanthin - a carotenoid with high commercial value. A two-stage process was
established for the production of astaxanthin from Haematococcus pluvialis now. This
work aimed to investigate effect of bicarbonate concentrations on astaxanthin
accumulation of H. pluvialis which was isolated from Hoa Binh province, Vietnam.
Obtained results have shown that the strongest induction on astaxanthin production of
H. pluvialis was achieved by nutrient deprivation when grown H. pluvialis cells for
three weeks at 4–10oC followed by supplementation with 100 mM bicarbonate and
continuous aeration. At this bicarbonate concentration, 100% of vegetative (green) cells
were transformed completely into red cysts contained the maximum astaxanthin content
of 48.8 mg. g-1 dry cell weight after three days. Our obtained results suggest a feasible
and effective method for enhanced astaxanthin production from H. pluvialis on the large
scale.
Keywords: Astaxanthin, bicarbonate, Haematococcus pluvialis, nutrient deficiency,
two-stage process
108
O-28
Mo/Al2O3 CATALYSTSIN OXIDATIVE DESULFURIZATION
OF DIESEL FUEL WITH TBHP-DMF SYSTEM
Wan Nazwanie Wan Abdullah*, Wan Azelee Wan Abu Bakar and Rusmidah Ali
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: wanazelee@kimia.fs.utm.my
Abstract.
Catalytic oxidative desulfurization (Cat-ODS) has been found to be an alternative
method to replace a conventional method which is hydrodesulfurization. The Cat-ODS
proposed comprises of molybdenum based catalyst, tert - butyl hydroperoxide (TBHP)
as oxidant and dimethylformamide (DMF) as solvent extraction. New catalyst
formulation of alumina supported polymolybdate based catalyst was investigated in this
research. A commercial diesel with 440 ppm of total sulfur was employed to evaluate
the elimination of sulfur compounds. Besides, the percentage of sulfur removal was
measured by Gas Chromatography-Flame Photometric Detector (GC-FPD).Transition
metalssuch as Fe, Co, Cu and Mn were introduced on the surface of alumina, prior to
the impregnation of Mo. Theresults showed that the activity in the oxidation of real
diesel with tert-butylhydroperoxide decreased in the order: Mo/Fe- Al2O3> Mo/ CoAl2O3> Mo/Cu-Al2O3 >Mo/Mn-Al2O3. Mo/Fe-Al2O3 is possible to reduce sulfur level in
commercial diesel from about 440 ppm to less 80.52 ppm with 81.70% of total sulfur
removed.The catalyst showed highest catalytic activity indicated that the presence of
phosphorus and ferum can significantly improve the catalytic activity of molybdenum
oxide catalyst. X-Ray Diffraction (XRD) diffractograms showed that the catalyst
calcined at low temperature was highly amorphous in structurewhile, at high
temperature showed highly crystalline phase. Field Emission Scanning Electron
Microscopy-Ray (FESEM) analysis showed that the catalysts were covered with smaller
particle sizes with undefined shape.
Keywords: Polymolybdates catalyst, Oxidative desulfurization, Commercial diesel
109
O-29
ISOLATION AND SCREENING OF Marine Azotobacter sp
FROM MARINE VIETNAM REGION BY THEIR BIOLOGICAL
NITROGEN FIXATON POTENTIAL.
Tran Nguyen Ha Vy*, Cao Thi Thuy Hang, Tran Thi Thanh Van and Bui Minh Ly
Nha Trang institute of Technology Research and Application
Email*: havy158@gmail.com
Abstract.
A lot of research work is available on the microbial biofertilizers in agriculture
practices. However, only dearth of work is available for contaminated soil salinity or
mangroves with regard to microbial biofertilizers. Therefore, the present study has
isolated Marine Azotobaccter sp from sea water, seaweeds, marine mollusks, bottom
sediment. More than 100 strains of marine bacteria were screened for biological
nitrogen fixation potential. 5 strains of bacteria were detected to effect of various
physio-chemical culture media.
110
O-30
SYNTHESIS OF Fe3O4@SiO2@Au CORE-SHELL-SHELL
STRUCTURE
Nguyen Thi Thuy*, Tran Anh Duc, Vu Van Son,
Nghiem Ha Lien, Tran Hong Nhung.
Instutite of Physics, VAST
No 10, Dao Tan Street, Ba Dinh, Ha Noi, Viet Nam
Email*:nguyenthithuyhy87@gmail.com
Abstract:
Iron oxide (Fe3O4) magnetic nanoparticles (NPs) have received significant interest for
biomedical applications in the diagnosis and treatment of various diseases. Besides
those ferromagnetic particles is limited about their unstable, aggregation, highly toxic.
Meanwhile, many advantages of silica are stable and non-toxic in biological
environments, bio-compatibility. In this paper, we synthesized the Fe3O4@SiO2 coreshell structure NPs with 120 nm diameter by using modified Stober method. The
functionalized their surfaces are attached by seed particles which are small gold NPs (1
- 2 nm). Then, they continuously grow into the shells gold. With the optimal stirring
speed and the pH of gold ions solution for shell growing, Fe3O4@SiO2@Au NPs are
metal nanostructures with thin and smooth gold layers. These well-dispersed core-shell
NPs show superparamagnetic properties at room temperature of the core (iron oxide
magnetic NPs), thus they can be controlled by using an external magnetic field. On the
other hand, these gold-coated magnetic silica spheres take advantage of the strong
resonance absorption in near-infrared (NIR) region. So these Fe3O4@SiO2@Au coreshell structures NPs are very promising in biomedical applications.
Keywords: Fe3O4, silica, core-shell, gold NPs, functionalization,
111
O-31
HEAT SENSOR USING SOLITON PULSE
IN PANDA RING RESONATOR
Azam Mohamad*1, Ahmad Fakhrurrazi Noorden1, Mahdi Bahadoran1,
Jalil Ali1, and Preecha Yupapin2
1
Institute of Advanced Photonics Science, Nanotechnology Research Alliance,
Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
2
Nanoscale Science and Research Alliance, Faculty of Science,
King Mongkut’s Institute of Technology, Ladkrabang, Bangkok 10520, Thailand
Email*: jalilali@utm.com.my
Abstract.
We show that the losses of soliton peak power in silicon-on-insulator (SOI) PANDA
Ring Resonator can be compensated by applied heat. The simulation indicates that
soliton-like propagation in PANDA ring resonator can be a good candidate for
nanoscale of heat sensor.In SOI material includes the impact of losses such as two
photon absorption (TPA), free carrier absorption (FCA), and linear loss [1 - 3]. This
impact will make the intensity of the light depleted when propagate along material but
all of them dealing with low input power which the probability of optical soliton
formation inside such device is low. The effect of losses is similar when we use another
model of ring resonator known as a PANDA ring resonator. In this letter, we focus on
the impact of heat on the optical soliton peak power at wavelength = 1.55 µm and
shows that the losses can be compensated by applied heat. The simulations are realized
using the MATLAB 7.10.0 (R2010a) software.The micrometer scale SOI based on
PANDA Ring Resonator with consisted of three microring resonators, where the first
and second ring are the sensing ring, with both radius are 10 µm. The third ring is used
to interconnect channel between the first and second ring, with the radius of 20 µm. In
operation, the change in sensing ring radius is due to the thermal expansion effect and
thermo-optic effect. This change of sensing ring radius is observed at the output and
drop ports. The soliton pulse is used as a detection signal to detect the change in sensing
radius at first and second ring. The modification of nonlinear Schrodinger equation
(NLSE) is used to study soliton evolution in SOI Panda Ring Resonator that is
expressed as
,
where
and
(1)
are the electric field and the group velocity dispersion (GVD). Here,
is the relation between nonlinear effect and the dimensionless two
photon absorption (TPA) parameter
which is obtained as
112
.
(2)
Here
, ,
, , , and are the TPA, nonlinear refractive index, propagation
constant in medium, linear absorption, cross section of free carrier absorption (FCA),
and free carrier density of silicon. When the soliton pulse is injected into PANDA ring
resonator, the soliton pulse would degrade their peak power and produce low power at
drop port that already shown in Fig. 1. Simulations predict that the soliton pulse
propagation in PANDA ring resonator is experience gains its power and compensate the
losses that come from linear and nonlinear absorption when applied heat as shown in
Fig. 1(b), 1(c), and 1(d). This results show that the soliton pulse is exposes losses before
heat is applied. When heat applied, the sensing ring is deformed due to the thermal
expansion effect and thermo-optic effect, which result power gain in the soliton pulse.
This prediction also can be used to design for the heat sensor based on the power gain at
output and drop port.
Pdrop1 [W]
Pin [W]
6
4
2
-2
0
0.4
0.2
0
-2
2
Normalized time, 
0
2
Normalized time, 
(a)
(b)
Pdrop2 [W]
Pout [W]
0.03
0.1
0.05
0
-2
0
2
Normalized time, 
0.02
0.01
0
-2
0
2
Normalized time, 
(c)
(d)
Figure 1. Soliton propagation in PANDA ring resonator; (a) the input soliton injected
into PANDA ring resonator, (b) the fraction of soliton at drop port, (c) through port,
and (d) drop port for the first roundtrip. The red line represents the soliton
propagation before applied heat and the blue line represents the soliton propagation
during applied heat.
113
O-32
SYNTHESIS OF ZNO NANORODS IN PBS SOLUTION, THEIR
MORPHOLOGICAL AND OPTICAL CHARACTERIZATION
K. Khun, Z. H. Ibupoto, S. Chen, W. M. Chen, I. A. Buyanova, M. Willander
Royal university Phnompenh, Cambosdia
Abstract.
In the present paper, we have grown highly dense and well aligned ZnO nanorods on the
gold coated substrate in (PBS) solution of different pH values. The energy dispersive
spectroscopy (EDS) had demonstrated that the ZnO nanorods were free of impurities.
The field emission scanning electron microscopy (FESEM) study had shown that the
morphology of ZnO nanorods depend on the pH of reaction solution, and ZnO nanorods
were highly vertically oriented with hexagonal shape having diameter about 200 nm.
The ZnO nanorods were grown along the c-axis and have wurtzite structure with a (002)
crystal plane as shown by the x-ray diffraction (XRD) pattern study. The
photoluminescence (PL) study revealed good optical quality of ZnO nanorods. The
surface of ZnO nanorods grown in phosphate buffer solution might be associated with
minimum number of dangling bonds and surface state density. This research work could
be helpful in the field of nanosensors based on ZnO nanorods and possibly may reduce
the chances of degradability of ZnO nanorods during the interaction with biofluid
samples."
114
O-33
THE CAPACITY OF SHEET PILE SHALLOW FOUNDATION
UNDER VERTICAL AND ECCENTRICITY LOADING ON CLAY
Chamroeun Chhun1*, Pongsakorn Punrattanasin2
Department of Civil Engineering, KhonKaen University, KhonKaen 40002, Thailand
Email*: chamroeunc@yahoo.com
Abstract.
This paper is introduced to sheet pile shallow foundation conducted on clay. The
purposes of the research how to improve sheet pile and shallow foundation capacity
were discussed. In the tests, vertical and eccentricity loading were considered with
bearing capacity and settlement that the loading transferred load to the top of shallow
foundation. Two types of model shallow foundation were used in this experimental. The
loading-settlements study by linearly variable differential transducers (LVDTs). The
results of tests were showed that the shallow foundation surrounded by sheet pile the
bearing capacity greater than shallow foundation. In this study the bearing capacity
much more greater follow by sheet pile length contribute have conducted.
Keyword: shallow foundation, sheet pile, vertical bearing capacity, clay.
115
O-34
HIGH-SPEED CAMERA AND CALCULATING VELOCITIES
IN EXCEL BY USING LEAST SQUARES FITTING
Pech Ouksaphea, KATO Tetsuya
Royal University of Phnom Penh
Abstract.
In this paper we will show how powerful of high-speed camera which is able to record
the fast motion phenomena that we cannot observe simply with our eyes and we will
also show how to calculate the velocities of a body by using the data of its positions
getting from analyzing the slow-motion video, which created by the high-speed camera.
Least squares fitting method is used for calculating velocities in Microsoft Word Excel
program.
Keywords: Casio EX-F1; least square fitting
116
O-35
BASIC CATALYST WITH AMMONIATED POLYETHYLENE
GLYCOL: A NEW TECHNOLOGY TO REMOVE NAPHTHENIC
ACID FROM PETROLEUM CRUDE OIL
Nurasmat Mohd Shukri*, Jafariah Jaafar, Wan Azelee Wan Abu Bakar
and ZaitonAbd. Majid
Department of Chemistry, Faculty of Science, UniversitiTeknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: jjaafar@gmail.com
Abstract.
Acidity in crude oils has long been a problem for refining, which increases the potential for
unexpected corrosion problems, but may extend the economic life of some existing
refineries.Naphthenic acid (NA) known as petroleum acids, are an important group ofpetroleum
acids. The most common current measure of the corrosive potential of a crude oil is the Total
Acid Number (TAN). In order to reduce the acidity in the crude oil, the current mitigation
method applied by other researchers includes of basic solution such as sodium hydroxide and
potassium hydroxide resulted in the formation of a severe emulsion between solvent and crude
oil is formed which is difficult to separateandthe treatments using of heating, hydrogenation,
and esterification all have destroyed the valuable resource of naphthenic acids, so further study
should be taken about removal of naphthenic acids from crude oil.Thus, the catalytic
deacidification technology was investigated. Two types of crude: PetronasPenapisan Melaka
Heavy Crude (A) and PetronasPenapisan Melaka Light Crude (B) with TAN values of 4.21 and
2.52 respectively, were studied. The ammoniated polyethylene glycol (PEG 2000) was used as
the deacidifying agent in this study with a concentration range of 100 - 1000 mg/L. The
experimental study revealed that cerium oxide as based catalyst supported on alumina was a
promising basic catalyst for catalytic deacidification than zinc oxide and tin oxide with optimal
content of ammoniated polyethylene glycol in crudes A and B were 500 and 100 mg/L
respectively, with the reagent/oil ratio being 0.4:1 (wt/wt). The acid removal was 93 % and 100
% for crude A and crude B respectively.XRD diffractograms illustrate that cerium oxide
supported with alumina catalyst is highly amorphous and FESEM micrograph of the catalyst
showed the mixture of larger and smaller particle with undefined shape.
Keywords: Catalytic deacidification, Deacidifying agent, Crude oil, Basic catalyst, Naphthenic
acid.
117
O-36
SQUALENE EXTRACTED AND PURIFIED FROM
HETEROTROPHIC MARINE MICROALGA Schizochytrium
mangrovei FOR THE FUNCTIONAL FOOD APPLICATION
Le Thi Thom, Nguyen Cam Ha, Dinh Thi Ngoc Mai,
Hoang Thi Minh Hien, Hoang Thi Lan Anh, Ngo Thi Hoai Thu, Dang Diem Hong*
Institute of Biotechnology, Vietnam Academy of Science and Technology
Tel: 04.3.7911059; Email: ddhong60vn@yahoo.com
Abstract.
Squalene is a highly unsaturated aliphatic hydrocarbon belonging to the triterpene group,
effective chemopreventive agent, increases cellular and nonspecific immune functions,
decreases serum cholesterol levels, protects against gamma rays. It is also a strong antioxidant
used extensively in the food and cosmetic industries. Squalene is stored mainly in the shark's
liver, plants, animals, microorganisms and microalgae. In this study, we have carried out the
optimization of culture conditions; squalene extracted and purified from heterotrophic marine
microalga Schizochytrium mangrovei. The highest content of squalene purifed was obtained
74.34 mg/g of dried weight and cytotoxic test of squalene on HepG2 cells was carried out.
Obtained results have showed that the squalene extracted from this microalga is non-toxic to
HepG2 cells at the highest concentration of 200 µg/mL for 24 hours. The maximum survival
rates reached 99-100% in the medium stimulated various concentrations of squalene (0; 4; 8; 20;
40; 80; 100 and 200 µg/mL; dissolved in DMSO). Obtained result has indicated that extracted
squalene from heterotrophic marine microalga of S. mangrovei can be used as functional foods.
Keywords: Cytotoxic, Functional food, HepG2, heterotrophic marine microalga, squalene,
Toxin
118
O-37
MEASUREMENT OF TOTAL CROSS SECTIONS OF CARBON
AND URAN ON FILTERED NEUTRONS BEAMS OF 54 keV
AND 148 keV AT DALAT RESEARCH REACTOR
T. T. Anh1*, P. N. Son1, V. H. Tan2, P. D. Khang3
1
2
Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, Vietnam
Vietnam Agency for Radiation and Nuclear Safety, Hanoi, Vietnam
3
Vietnam Atomic Energy Institute, Hanoi, Vietnam
Email*: ttanhfr@yahoo.com
Abstract:
Neutron filter technique is an effective tool to create the quasi-monoenergetic neutrons.
Determination of total neutron cross sections and resonance parameters in the energy
range from tens keV to hundreds keV is very important of the basic nuclear research,
shielding, calculations and designs for fast reactors. A transmission neutron system
using a proton-recoil counter of LND-281 has been established on the horizontal
channel of N0. 4 at the Dalat Research Reactor. Total neutron cross sections of C and U
were measured on filtered neutron beams of 54 keV and 148 keV with the accuracy less
than 2%. The obtained results are in good agreement with those of the other authors and
evaluated data from ENDF/B-VII.
Keywords: Neutron filter technique, total neutron cross section, proton-recoil counter
119
O-38
PHOTOLUMINESCENCE BIOSENSOR BASED ON
CdZnSe/ZnS TERNARY ALLOY QUANTUM DOTS FOR
PESTICIDE DETECTION
Nguyen Ngoc Hai*, Nguyen Hai Yen, Duong Thi Giang, Dinh Hung Cuong,
Nguyen Duc Nhat, Pham Thu Nga and Dao Tran Cao
Institute of Materials Science, Vietname Academy of Science and Technology,
18 Hoang Quoc Viet Road, Cau Giay Dist., Hanoi City, Vietnam
Email*: haidhsphn@gmail.com
Abstract:
In this report, we shall present the optical properties of the biosensors fabricated from
CdZnSe/ZnS quantum dots. The optical properties such as absorption and emission of
the ternary quantum dots before and after coupling with the protein molecules like
Streptavidine (SA) and enzymes such as acetylcholinesterase (AChE), to form a
biosensor structure, will be presented. In particular, the changes in luminescence
intensity according to the pH value of the solution environment containing biosensor
has been considered, before and after the presence of pesticides at concentrations <1
ppm. The changes in luminescence intensity of the biosensor after the presence of
pesticide over time from 2 seconds to 30 minutes were also surveyed. Some tests to
determine the trace amounts (<1 ppm) of commodities pesticides like Motox 5EC,
containing Cypermethrin (OP) 5% and Tungatin 10 EC, containing Abamectin (CM)
10%, on some real samples like green vegetables, tea leaves, have been carried out and
presented in this report. Some characteristics of the relationship between composition,
structure and special optical properties of ternary alloy quantum dots will also be
presented. These are the completely new results and have never been published before.
These studies open up the potential of practical applications of binary and ternary
quantum dots for agricultural production.
120
O-39
NON THERMAL PLASMA TECHNOLOGY
IN WATER TREATMENT APPLICATION
Nur Zazwani Rosdi*, Dr. Raja Kamarulzaman Raja Ibrahim
Advance Photonics Science Institute, Faculty Science, Universiti Teknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia.
Email*: rkamarulzaman@utm.my
Abstract.
This study aims to characterize the influence of temperature to efficiency of plasma
reactors. Two types of self design and fabricate reactor consists of Packed Bed Reactor
and Dual Parallel Plate Reactor with an integrated system will be used to produce
atmospheric pressure Non Thermal Plasma and to treat samples of Volatile Organic
Compounds in wastewater from commercialized an air stripper. Hence, the samples of
VOCs will be transferred to the plasma reactors for plasma reactions and convert part of
molecules to decompose pollutants. As time is increasing the temperature also increase.
Fiber Bragg Grating (FBG) is embedding into plasma reactor to act as a temperature
sensor. The rising of temperature must be studied in order to measure the efficiency of
both reactors in treating and decompose VOCs.
Keywords: Non Thermal Plasma, Packed Bed Reactor, Volatile Organic Compounds
(VOCs)
121
O-40
EIT ENHANCED KERR NONLINEARITY IN THE FIVELEVEL SCHEME OF COLD 85Rb ATOMIC VAPOUR
Le Van Doai*, Nguyen Manh An, Dinh Xuan Khoa and Nguyen Huy Bang
Vinh University, 182 Le Duan Street, Vinh City, Vietnam
Email*: bangvinhuni@gmail.com
Abstract.
Electromagnetically induced transparency (EIT) [1] is a quantum interference
phenomenon that occurs between alternative transition pathways, driven by radiation
fields within the internal state of the quantum system. This interference may lead to the
cancellation of absorption for a probe radiation field, tuned in resonance to an atomic
transition. As a consequence, it can lead to profound modification of the optical and
nonlinear optical properties. Thus, control of optical and nonlinear optical properties
and processes becomes possible. Phenomena associate with EIT have attracted great
attention in recent years due to its application in nonlinear optics and quantum optics.
In nonlinear optics [2], third order Kerr nonlinear susceptibility (  (3) ) plays a very
important role, and the enhanced Kerr nonlinearity has some useful applications in
cross-phase modulation [3] and self-phase modulation for the generation of optical
solitons [4]. In a multi-level atomic system with EIT, nonlinear optical processes, such
as four-mixing [5] and frequency conversion [6] can be great enhanced. It is desirable to
realize the giant Kerr nonlinearity with low light powers [7], since it can be used to
realize single-photon nonlinear devices. In recent years, large third-order nonlinear
susceptibility under vanishing linear absorption has attracted great attentions in both
theoretically and experimentally aspects [3 - 10]. Especially, the enhanced Kerr
nonlinear coefficient (n2) of a three-level atomic system was directly measured under
conditions of EIT [10]. It shown that the nonlinear Kerr coefficient is increased several
orders of magnitude.
Although the results of the above study in the three-level atomic system has opened up
some promising applications. However, the main limitation of the three-level atomic
configuration is too narrow spectral region of Kerr nonlinearity. Therefore, some
researchers have proposed increase the number of transparency windows by extend the
four or five-level atomic system [11, 12]. More attention is the work of the group of H.
Wang et al in Ref. [12] reported the results of the experimental study on EIT in the Rb85
atomic system with closely-spaced hyperfine levels that is excited simultaneously by
one laser field according to the five-level cascade scheme. This same model, we have
successfully implemented the analytical method to lead to the results of the EIT which
agree well with the experimental results [13].
122
In this work, we derive, for the first time, an analytical form of Kerr nonlinearity in the
five-level cascade system of cold 85Rb atom as function of probe frequency detuning,
coupling frequency detuning, and coupling intensity. The spectral profiles of Kerr
nonlinear coefficient and their dependences on the intensity and frequency detuning of
coupling laser are investigated theoretically. We find controllable optical spectral
regions (windows) in which Kerr nonlinearity is greatly enhanced with the vanishing
absorption.
Keywords: Kerr nonlinearity; electromagnetically induced transparency.
123
O-41
THE CdS/CdSe/ZnS PHOTOANODE CO-SENSITIZED SOLAR
CELLS BASED - ON Pt, CuS, CU2S, PbS
COUNTER ELECTRODES
Thanh Tung Ha1*, Thanh Nguyen Nguyen1, Quang Vinh Lam2,
Thai Hoang Nguyen2, Thanh Dat Huynh3
1
Faculty of physics, Dong Thap University, Dong Thap province, Vietnam.
2
University of Science, Viet Nam National University - HCM City, Vietnam
3
Viet Nam National University - HCM City, Vietnam
Email*: tunghtvlcrdt@gmail.com
Abstract.
Highly ordered TiO2 mesoporous modified by CdS, CdSe and ZnS quantum dots (QDs)
were fabricated by Successive ionic layer adsorption and reaction (SILAR) method [1].
The first QDs layer consisted of 44.44% CdS, 33.33% CdSe and 22.22% ZnS. The
quantity of material deposition seems to be affected not only by the employed
deposition method but also and mainly by the nature of the underlying layer. The CdS,
CdSe and ZnS QDs modification expands the photoresponse range of TiO2 mesoporous
from ultraviolet region to visible range. As confirmed by UV - Vis spectrum. Optimized
anode electrodes led to solar cells producing high current densities. Pt, CuS, PbS and
Cu2S have been used as electrocatalysts on counter electrodes. The maximum solar
conversion efficiency reached in this work was 1.52% and was obtained by using Pt
electrocatalyst. Both CuS, PbS and Cu2S gave high currents and this was in line with the
low charge transfer resistances recorded in their case.
Keywords: SILAR, Quantum dots, Counter electrodes, Solar cells
b)
a)
Figure 1. FESEM images of
the PbS (a), CuS (b), Cu2S
(c) and Pt (d) counter
electrodes.
c)
124
d)
P-44
CLONING AND EXPRESSION OF A GENE ENCODING
CHITINASE FROM LECANICILLIUM LECANII 43H
IN PICHIA PASTORIS
Nguyen Huu Quan*, Vu Van Hanh, Quyen Dinh Thi
Institute of Biotechnology, VAST, 18 Hoang Quoc Viet road, Distr. Caugiay, Hanoi, Vietnam
Email*: nhquan.ibt@ibt.ac.vn
Abstract.
Chitinase (EC.3.2.1.14) is an enzyme catalyzing hydrolysis of 1.4-β-glycoside bonds in
molecule chitin and can be produced by a wide variety of organisms. Chititnase has
been used in controlling pathogenic fungi in plants and insects. Recently, the gene
encoding the chitinase from several microbial strains have been cloned and expressed in
heterologous host cells and recombinant enzymes have been purified and characterized.
In this study, the gene encoding the chitinase from Lecanicillium lecanii 43H (1269 bp,
GenBank JX665045) was cloned and expressed in Pichia pastoris X33 by using an
expression vector pPICZαA. The transformant expressing the highest level of the
chitinase (1.101 U/ml supernatant) was selected. The recombinant chitinase was
produced with the highest level in culture YP after induction of 1.5% methanol for 120
h. The recombinant chitinase showed a molecular mass of 45 kDa on SDS-PAGE. The
chitinase was successfully expressed in P. pastoris X33.
Keywords: Chitinase, cloning, expression, Pichia pastoris X33, Lecanicillium lecanii
125
P-45
RECENT RESULT FROM THE CLINICAL TREATMENT OF
VARICOSE VEINS USING LOW POWER
SEMICONDUCTOR LASER
Tran Minh Thai, Ngo Thi Thien Hoa, Can Van Be, Tran Thi Lien Minh
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email*: tmthai_dhbk@yahoo.com
Abstract.
In this paper, we represent recent results from our clinical treatment of varicose veins
using low power semiconductor laser. Based on the clinical treatment, we carry out the
assessment of this method. The treatment process is tested on 40 patients divided into
three different varicose vein levels. The assessments are carried out at the end of second
therapy and third therapy (one therapy consists of 20 treatment times). We found that
42.5% patients achieve good, 50.0% achieve well, and 7.5% achieve average. This
result shows the prominent of the low power semiconductor laser therapy in the
treatment of varicose veins.
126
P-46
LOCAL STRUCTURE OF CA DOPANT IN BATiO3 (Bi0.5Na0.5)TiO3 SYSTEM BY CA K - EDGE X-RAY
ABSORPTION NEAR-EDGE STRUCTURE AND
FIRST - PRINCIPLES CALCULATIONS
Ittipon Fongkaew1, 2 *, Sukit Limpijumnong1, 2, Jiraroj T-Thienprasert 2, 3
1
School of Physics, Suranaree University of Technology, NakhonRatchasima 30000, Thailand
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
3
Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
Abstract.
X-ray absorption near edge structure (XANES) experiment are performed on Ca-doped
BaTiO3 - (Bi0.5Na0.5)TiO3 (BT-BNT) samples and compared with first-principles
XANES simulations. The feature of the measurement Ca K- edge XANES are
consistent with the first-principles XANES of Ca on the Ba site and inconsistent with
Ca on other sites. The clear agreement between and first-principles theoretical XANES
spectra report here is by far the good evidence of Ca substituting for Ba in 0.9BaTiO3 –
0.1(Bi0.5Na0.5)TiO3. This work illustrates that a first-principle framework, which used to
study impurities in crystal, can be used in conjunction with XANES measurement in
order to identify an impurity structure with a high degree of confidence. This approach
may thus be applicable to study impurities in other composite compound crystals.
127
P-47
SYNTHESIS AND PROPERTIES OF THERMALLY
DECOMPOSED Tb-DOPED ZnO NANORODS
K. Noipa1, 2*, S. Rujirawat1, 2, R. Yimnirun1, 2, V. Promarak3 and S. Maensiri 1, 2
1
School of Physics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima, 30000, Thailand
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
3
School of Chemistry, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima, 30000, Thailand
Email*: kiattisak_noipa@yahoo.com; Phone: +66-44-224319, ext. 4319, Fax: +66-44-224319,
Abstract.
A simple direct thermal decomposition rout was use to synthesize Tb-doped ZnO
nanorods by using (C4H6O4Zn) and (C2H3O2)3Tb. xH2O as starting materials. Structural,
magnetic and optical properties were studied. The prepared products were characterized
by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD
result indicates that the patterns of Tb-doped ZnO with different doping concentrations
are pure phase with the wurtzite structure ZnO. No any impurities were detected. TEM
images reveal that nanoparticle and nanorods are several hundreds of nanometer in
length. High-resolution TEM micrographs show the interplanar distance of fringes are ~
0.26 nm which is corresponding to the (002) plane of wurtzite ZnO. The selected-area
electron diffractions (SAED) show spotty ring patterns, revealing their highly
crystalline ZnO wurtzite structure (JCPDS, 36 - 1451). Which is consistent with those
of (100), (101), (102) and (110) planes of the XRD results. The optical properties of the
samples were investigated by Photoluminescence spectra (PL). The results indicate that
the emission spectra of the peaks at 490 nm and 544 nm respectively are of Tb 3+ions.
The O1s XPS spectrum is presents in a sharp peak centering around 530 eV and 531.5
eV ascribed to the coordination of oxygen in Tb-O-Tb and Tb-O-Zn. High-resolution
spectrum of Tb 4d peak evidently shows the peak located at ~ 148.5 eV revealing the
formation of Tb-related phase of Tb2O3. Hence the valence state of Tb in the samples
was mainly is Tb3+. The magnetic properties of the samples were investigated by
vibrating sample magnetometry (VSM). Magnetic measurements indicate that all of the
Tb-doped ZnO samples exhibited room temperature paramagnetic behavior. We suggest
that it is possibly due to the substitution of Tb3+ ion into the Zn site.
128
P-48
THE POSITRON – ELECTRON ANNIHILATION IN ZnO: THE
SLATER – TYPE ORBITALS, MODIFIED JASTROW AND
VARIATIONAL QUANTUM MONTE CARLO METHOD
Trinh Hoa Lang*, Chau Van Tao, Huynh Ngoc Tram
Faculty of Physics and Engineering Physics, University of Science –HCM city
Email*: thlang@hcmus.edu.vn
Abstract:
Positron annihilation rate and life time are studied in ZnO by assumption that positron
binds with the outer shell electrons of Zinc and Oxygen to form the pseudo ZnO –
positron molecule before it anihilates with one of these electrons. In this work, the
Slater type orbitals, modified Jastrow included short range interaction of electron positron function and LCAO approximation are used to form electrons and positron
wavefunctions in ZnO, and by using Variational Quantum Monte – Carlo method
(VQMC) [7] the ground-state wavefunction of this system is determined. By this
wavefunction, the enhancement factor, annihilation rate and life time of positron can be
determined. The results based on pure theoretical calculation are quite reasonable but it
is greater than the experimental result. This deviation in this calculation comes out is
because of the exchange effects which is not included and the single ZnO whose the
valence electron density is smaller than the bulk ZnO is considered.
Keywords: Positron, Variational Quantum Monte – Carlo, ZnO, Jastrow.
129
P-49
DIELECTRIC PROPERTIES OF TITANATE NANOTUBES
PREPARED BY HYDROTHERMAL ROUTE
Pristanuch Kasian 1, 2 *, Saroj Rujirawat 1, 2, Rattikorn Yimnirun1, 2,
Teerapon Yamwong3 and Santi Maensiri 1, 2
1
School of Physics, Institute of Science Suranaree University of Technology,
NakhonRatchasima, 30000 Thailand
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
2
National Metals and Materials Technology Center (MTEC), Pathumthani 12120, Thailand
Tel.: +66-44-224319 ext. 4319; Email*: pristanuch@hotmail.com
Abstract.
In this work, we report the dielectric response of the scrolled titanate nanotubes
(NaxH2-xTi3O7.nH2O) prepared by hydrothermal treatment of TiO2 in 10 M NaOH at
temperatures of 130 °C for 24 h. The prepared Na0.96H1.04Ti3O73.42H2O nanotubes
were converted into TiO2-base by subsequent acidic rinsing and ultrasonication. The
prepared samples were characterized by X-ray diffraction (XRD), scanning electron
microscopy (SEM) and transmission electron microscopy (TEM). The diameters of the
nanotubes are about 7 - 10 nm and lengths of several hundreds of nanometer or
micrometer in scales. The NaxH2-xTi3O7.nH2O exhibited a high dielectric constant, ε΄~
104-105. For a given temperature, ε΄ decreased with frequency and finally trended to a
situation at higher frequency. The dielectric properties and electrical responses of grain
behavior were investigated and discussed in details.
130
P-50
THE INFLUENCE OF HIGH FIELD INSERTION DEVICES ON
THE BEAM DYNAMICS OF SPS STORAGE RING
S.Krainara1, 2*, P. Sudmuang2, S.Maensiri1, S.Rugmai2, P.Klysubun2, A.Tong-on2
1)
School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional
Nanomaterials, Suranaree University of Technology, 111 University Avenue, Muang District,
Nakhon Ratchasima 30000, Thailand
2)
Synchrotron Light Research Institute (Public Organization),
P.O. Box 93, Nakhon Ratchasima 30000, Thailand
Email*: siriwan@slri.or.th
Abstract:
The Siam Photon Source (SPS) with an electron storage ring having the beam energy of
1.2 GeV which was designed to use the primary source from dipole magnets. In order to
response the requirement of hard X-ray synchrotron radiation to the beam line user, the
Synchrotron Light Research Institute (SLRI) have planned to install two high field
insertion devices into SPS storage ring consisting of the 6.5 T Superconducting
Wavelength Shifter (SWLS) and 2.4 T Hybrid Multipole Wiggler (MPW). These
devices will provide higher the photon energy and flux density of synchrotron radiation
than that of dipole magnets. Due to an influence of the SWLS and MPW installation,
the effect on electron beam optic parameters such as the betatron tune shift, betatron
function beating, emittance blow up, and energy loss are studied in this presentation. In
order to obtain these effects precisely, the calculations will be performed by using three
different codes consist of MAD-X, AT-ROOT and TRACY-3.
Keywords: Insertion devices, Beam dynamics, Hard X-ray
131
P-51
ELEMENTAL ANALYSIS OF INDIUM TIN OXIDE BY
SYNCHROTRON XRF
C. Songsiriritthigul1, T. Saisopa2, 3, M. Phanak1, N. Mothong1, N. Yachum1,
S. Chidchob1, N. Sumano1, P. Songsiriritthigul1, 3, 4*
1
2
Synchrotron Light Research Institute, Nakhon Ratchasima, 30000, Thailand
School of physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
3
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, NakhonRatchasima 30000, Thailand
4
Thailand Center of Excellence in Physics, CHE, Bangkok, 10400, Thailand
Email*: prayoon.song@gmail.com
Abstract.
This report presents an XRF experimental set up using synchrotron light and
measurement results of indium tin oxide (ITO) and chlorinated ITO. A 50-mm2 Si drift
detector with a 12-micron beryllium window is installed in vacuum. Excitation light is
from a bending magnet of a 1.2 GeV storage ring of the Siam Photon Source, the first
synchrotron light source of Thailand. A double crystal monochromator provides
monochromatic light between 2.4 to 10 keV. Tunable photo energy allows the
enhancement of the fluorescent yield of light elements to be obtained by choosing the
exciting photon energy above and near the absorption edge. It was possible to detect
light elements as light as sodium, the element in the glass substrate. The XRF results
taken from ITO and chlorinated ITO will be presented and discussed.
Keywords: synchrotron light, XRF, ITO, chlorinated ITO
132
P-52
HIGH PRESSURE PHASE OF LiGaO2:
FIRST PRINCIPLES CALCULATIONS
Wutthigrai Sailuam1, 2,*, Kanoknan Sarasamak3 and Sukit Limpijumnong1, 2
1
School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional
Nanomaterials, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
2
Thailand Center of Excellence in Physics (ThEP Center), Commission on Higher Education,
Bangkok 10400, Thailand
College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang,
Bangkok 10520, Thailand
3
Email*: wutthigraiphys33@gmail.com
Abstract.
The natural and high-pressure forms of LiGaO2, i.e., -LiGaO2 and δ-LiGaO2,
respectively, were studied by first principle calculations with generalized gradient
approximations (GGA). By calculating the equation of states, i.e., the total energy as a
function of the lattice constant, for both phases, the phase equilibrium pressure can be
determined. It is found that; -LiGaO2 is in energetic equilibrium with the δ-LiGaO2 at
3.5 GPa. At the phase equilibrium pressure (3.5 GPa), the calculated enthalpy barrier for
the homogeneous transformation between -LiGaO2 and δ-LiGaO2 is 1.3 eV. The
homogeneous transformation barrier [1] describes the upper limit for the barrier of
phase transformation assuming that the entire crystal is transformed simultaneously. In
reality the transformation can take place cascadingly; leading to a much lower
transformation barrier. In addition, we also predict a new hexagonal crystal form of
LiGaO2, named h-LiGaO2, which is similar to ZnO with Li and Ga alternatingly occupy
Zn sites. Our calculations showed that -LiGaO2 can potentially undergo a
transformation to h-LiGaO2 under extreme uniaxial compressive stress (above 3.5 GPa)
along the [1] direction of -LiGaO2.
133
P-53
STUDYING AVERAGE (n, p) CROSS SECTION OF Fe AND Ti
BY NEUTRON ACTIVATION USING Am-Be SOURCE
Nguyen Vu Minh1, Nguyen Anh Khoa1, Luu Dang Hoang Oanh *1,
Huynh Truc Phuong 1, Nguyen Thi Quy2
1
Department of Nuclear Physics, Faculty of Physics and Engineering physics,
University of Science-Ho Chi Minh City
2
University of Education-Ho Chi Minh City
Email*: ldhoanh@hcmus.edu.vn
Abstract:
In this thesis, average (n, p) cross section of Fe and Ti were researched by neutron
activation method using fast neutron channel and Am-Be neutron source. Target
isotopes (Fe and Ti) were powder samples (Fe2O3 and TiO2). Average cross sections of
nuclear reactions such as 54Fe(n, p)54Mn, 56Fe(n, p)56Mn, 47Ti(n, p)47Sc and 48Ti(n,
p)48Sc were determined. Result of this thesis was compared with experimental values of
De Corte. Relative deviation was smaller than 30%.
Keywords: Am-Be neutron source, average cross section, 54Fe(n, p)54Mn cross section.
134
P-54
FABRICATION AND CHARACTERIZATION OF C/ZnFe2O4
COMPOSITE NANOFIBERS BY ELECTROSPINNING
S. Nilmoung1, 2*, R. Yimnirun1, 2, S. Rujirawat1, 2, S. Maensiri1, 2
1
School of Physics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima, 30000, Thailand.
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Email*: nilmoung@yahoo.com
Abstract.
C/ZnFe2O4 composite nanofibers have been successfully fabricated by electrospinning
technique followed by carbonization process in order to evaluate their magnetic and
electrochemical behavior. As reference sample, pure carbon nanofiber (CNFs) was also
prepared. All of samples were characterized by means of XRD, SEM, Raman
spectroscopy, BET, VSM, respectively. The electrochemical properties were determined
using cyclic voltammetry and electrochemical impedance technique in a three electrode
configuration. The characterization results showed that, the content of spinel ZnFe2O4
nanoparticles strongly affected to the morphology, the structure, the magnetization and
the specific capacitance of CNFs. The morphology of fiber appeared straight and
uniform in cross section and ~30 % shrinkage after carbonization due to the combustion
of organic PAN matrix. The crystallite size increased with increasing of metal source
content. Moreover, the composite nanofibers exhibited ferromagnetic behavior with the
saturated magnetization (Ms) values of 0.148, 1.673, and 11.198 emu/g for the ZnFe2O4
contents of 20, 40 and 60wt%, respectively. The first two values were lower than that of
ZnFe2O4 nanoparticles (5 emu/g) [1] possibly due to the non magnetic material covering
of PAN, while the third was higher, due to heavy content of Fe. For the electrochemical
tests, the cyclic voltammograms of all samples retain nearly rectangular with no peak of
redox reaction, which are characteristics for double layer capacitor [2]. The specific
capacitance at lowest scan rate (5 mV/s) of C/ ZnFe2O4 _20 wt% (1300 mF/g) is larger
than those of C/ ZnFe2O4 _60wt.% (900 mF/g) and C/ ZnFe2O4 _40 wt% (480 mF/g),
respectively, mainly due to its highest surface area and lowest of the
electrode/electrolyte contact resistance (Rs).
135
P-55
FABRICATION AND CHARACTERIZATION OF
Ni - NiO/CARBON COMPOSITE NANOFIBERS
Tanayt Sinprachim1, 2*, Santi Maensiri1, 2
1
School of Physics, Institute of Science, Suranaree University of Technology,
Nakhon Ratchasima, 30000, Thailand.
2
NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials,
Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Email*: tanayt65@hotmail.com
Abstract.
Electrospun webs of polyacrylonitrile(PAN) 10 wt% and nickel nitrate (Ni(NO3)2) 20
wt% of PAN in N‟N-dimethyformamide( DMF) were used as the precursor for
fabrication of various carbon-based composite nanofibers. TGA-DSC was used to study
the thermal properties of the as spun webs. In order to archive the various features of
carbon-based composite nanofibers, the as spun webs were heated with difference
heating treatment steps as follows: 5000C (Ar), 500 0C (Ar+air), 500 0C (air), 900 0C
(Ar) and 5000C (Ar+air) → 900 0C(Ar). SEM and TEM were used to characterize the
morphologies while the phase structures were studied via XRD analysis. Exothermic
peak of DSC at 294 0C relates to phase transition of polymer into carbon phase. The
XRD spectra present the different microstructure of each carbonized webs of CNFs,
NiO/CNFs, NiO, Ni/CNFs and Ni-NiO/CNFs corresponding to heating treatment above
respectively. The average sizes of carbonized samples were reduced by heating process
from 466 nm to 282 nm. The uniform and smooth surface of as spun webs became
decay surface for the composite of NiO inside carbon nanofibers. However, the ratio of
flowing gas between air and argon is very important to produce Ni-NiO/CNFs.
136
P-56
FIRST PRINCIPLES CALCULATIONS OF Bi(Mg 1/2Ti 1/2)O3
CRYSTAL STRUCTURE
Nuchalee Schwertfager1*, Narasak Pandech1, Malliga Suewattana2
and Sukit Limpijumnong1
1
School of Physics and NANOTEC-SUT Center of Excellence on Advanced Functional
Nanomaterials, Suranaree University of Technology, NakhonRatchasima 30000, Thailand
2
Collaborative Unit of Quantum Information and Department of Physics, Faculty of Science,
Mahidol University, Bangkok 10400, Thailand
Email*: nuchalee.schwertfager@gmail.com
Abstract.
First principles calculations can be used to reliably calculate detailed structure of
crystalline materials. Recent first-principles study [Phys Rev B 86, 064105 (2012)]
showed that Bi, Mg and Ti in Bi(Mg1/2Ti1/2)O3 (henceforth, BMT) are off-centering
from the center of their oxygen cages by a large amount. This implies that BMT is
potentially a good piezoelectric ferroelectric material. Because it is stillnot clearwhether
BMT is ordered or disordered alloy, it is almost impossible to resolve the fine structure
(off-centering) of each cation species by traditional x-ray diffraction (XRD)
measurements. However, the x-ray absorption spectroscopy (XAS) which is a sensitive
technique to probe the local structure of each interested element. In this work, we
calculated the x-ray absorption spectra at the so-called x-ray absorption near edge
spectra (XANES) region of Bi, Mg, and Ti –edges in BMT.The models studied include
the ideal structure (the cations reside at the center of the oxygen cages), the
experimental proposed structure (based on XRD measurements) and the calculated
structure (based on the calculated energy optimization). We will show how the XANES
features depend on the off-centering magnitudes.
137
P-57
A SOLUTION TO OPTIMIZE FLIGHT PROFILES
OF FLYING OBJECTS
Tran Phu Hoanh*, Dang Tran Ngoc Chau
VietNam Academy of science and military technology
Email*: tranphuhoanh@gmail.com
Abstract.
In the process of designing flying unit, minimizing problem plagued the coefficient of
aerodynamic friction to enhance engine performance is an issue that designers are very
interested in. Apart from finding the optimum materials to reduce the coefficient of
friction, the design for optimum shape also plays an important role, affecting the
aerodynamic quality of flight unit. In this article framewok, I want to propose a plan to
optimize flight profiles of flying objects based on Newton-Buzeman theory and used
Genetic-Algorithm(also known as G-A algorithm) to solve the extremum of arithmetic
functional (or to solve the extreme of math).
GA algorithm has many advantages in problems solving, in which the extreme of the
points for survey are discrete and required input conditions are minimal.
With these advantages, the algorithms are increasingly widely being used in extremum
of arithmetics. Optimized flying object at minimum coefficient Cx target based on
theoretical algorithm GA & N&B is the aim to achieve. In additionaly, making
comparisons with the research results calculated by the method of aerodynamic
coefficient those are being used currently.
Conclusions on the advantages and disadvantages of the method, thus generating the
plan calculates the optimal design for flying unit profiles.
138
P-58
THE REDISTRIBUTION OF INTENSE GUASSIAN BEAM
IN THE KERR MEIDUM
Hoang Van Nam1, Cao Thanh Le2, Chu Van Lanh3,
Thai Dinh Trung3, Ho Quang Quy4 *
1
Council of Science and Technology, Hatinh, Vietnam
2
Hatinh University, Vietnam
3
University of Vinh, Nghean, Vietnam
4
Academy of Military Science and Technology, Vietnam
Email*: hoquangquy@gmail.com
Abstract.
The intensity distribution of the Gaussian laser beam in the optical tweezer influences
on the optical force acting on the dielectric particle embedded in the Kerr medium. The
intense Gaussian beam irradiated the Kerr medium creates the change of refractive
index not only, but its self - focusing, consequently it redistributes. The intensity
expression of the Gaussian laser beam in Kerr medium is dirived. The intensity
distribution of modified Gaussian beam in plane ρ-z of the Kerr medium is simulated
and the position of the waist of the redistributed Gaussian beam is discussed for use it to
optical trap in the future.
Keywords: Gaussian beam, Kerr effect, nonlinear medium, Self-focusing, intensity
redistribution.
139
P-59
EFFICIENCY FREQUENCY - DOUBLING OF BETA - BARIUM
BORATE (BBO) USING LASER DFB PUMPED BY THE
SECOND HARMONIC OF NANOSECOND LASER Nd: YAG
Le Thi Ly*, Vu Duong, Nguyen Thi My An, Do Quang Hoa
Instutite of Phyics, VAST
No. 10, Dao Tan Street, Ba Dinh, Ha Noi, Viet Nam
Email*:lelelyly.hus@gmail.com
Abstract:
We study the second harmonic generation (SHG) of tunable wavelength DFB laser with
the full width half maximum is about 30 ps, using Beta-Barium borate crystal ( BBO 8 x
4 x 7 mm, type I, θ =36.3o cut, ϕ= 0o). The tunable wavelength SHG signal is going to
use in SFG system (sum-frequency generation) in order to generate vacuum ultraviolet
radiation. As a result, the quantum efficiency and the power change from 10 % to 15 %
and from 1.12 mW to 3.96 mW corresponsively when the wavelength of DFB laser to
changes from 579 nm to 604 nm. Some discussion and assessment are also mentioned in
this report.
Keyword: second harmonic genneration, BBO, laser Nd:YAG.
140
P-60
SYNTHESIS AND OPTICAL CHARACTERIZATION OF SMALL
DIAMETER GOLD NANOSHELLS
FOR BIOMEDICAL APPLICATIONS
Thi Hue Do, Thi Thuy Nguyen, Thi Ha Lien Nghiem*, Hong Nhung Tran
Institute of Physics, Vietnam Academy of Science and Technology,
18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam
Email*: halien@iop.vast.ac.vn
Abstract:
Small gold nanoshells sub 100 nm were grown on monodispersed of
aminoprotpyltriethoxysilane (APTES) functionalized of silica nanoparticles (NPs) with
average diameter of 40 nm synthesized by Stober route. Gold shells were deposited onto
the surface of silica NPs by tetrakis(hydroxymethyl) phosphonium chloride (THPC) and
plating method. The coverage of the gold nanoshells on the surfaces of the silica NPs
was evaluated using UV-VIS/NIR spectrospcopy and transmission electron microscopy
(TEM). The plasmon resonance wevelengths of these gold nanoshells were tunable from
visible to near infrared region. The gold nanoshells were also bioconjugated with anti
HER2 monoclonal antibody for diagnostic breast cancer cells by dark field microscope
images.
Keywords: gold nanoshells, silica NPs, SPR, dark field image.
141
P-61
SYNTHESIS OF FLUORESCENCE SiO2 NANOPARTICLES WITH
CdTe QUANTUM DOTS BY MODIFIED STӦBER METHOD
T.H.Nga Nguyen1, T.B.Ngoc Nguyen1, V.H.Chu2, T.H.Lien Nghiem1,
T.D.Thuy Ung3 and H. Nhung Tran1
1
Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
2
Thai Nguyen University of Education, Thai Nguyen, Vietnam
3
Institute of Biotechnology, VAST, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
Abstract.
Quantum dots have emerged as a new class of fluorescent probe for in vivo
biomolecular and cellular imaging because they are highly photo-stable with broad
absorption spectra, narrow size-tunable emission spectra, remarkably resistant
photobleaching can span the light spectrum from the ultraviolet to the infrared region,
and have long fluorescence lifetimes. Due to the toxicity of quantum dots, reducing the
toxicity is still being studied for in vivo application. One route known to reduce the
toxicity and also avoid the blinking of quantum dots is coating the quantum dots by
silica layers. The silica matrix is inert in many environments, biocompatible, prevents
agglomeration, functionality, and serves as the substrate for easy bioconjugation. For
the synthesis of silica nanoparticles, the most common approach is Stöber method
which has involved grafting of organic groups by chemical reaction of pre-synthesized
silica particles with certain coupling agents. This simple method can be carried out with
non toxic solvents such as water or ethanol, and has been modified to incorporate
quantum dots inside the silica nanoparticles and reform high uniform beads.
CdTe@SiO2nanoparticles
Uncoated CdTe quantum dots
Intensity (a.u)
800
600
400
200
0
450
500
550
600
650
700
Wavelength (nm)
Figure 4. TEM images of
CdTe@SiO2 nanoparticles.
Figure 2. Fluorescence spectra of CdTe@SiO2
nanoparticles compared with uncoated CdTe
quantum dots.
142
This work presents the synthesis of silica coating CdTe quantum dots by using
modified Stöber method. We used tetraethylorthosilicate (TEOS) and
aminopropyltriethoxysilane (APTEOS) as precursors, and ammonium hydroxide and
sodium hydroxide as catalysts. The size of CdTe@SiO2 nanoparticles is estimated about
300 nm with several quantum dots inside. The prepared fluorescence silica
nanoparticles exhibit strong fluorescence intensity with quantum yield of about 40%,
and mostly unreduced compared with that of uncoated quantum dots. The results show
an ability to use the CdTe@SiO2 nanoparticles as biomarkers.
Keywords: Stöber method, fluorescence SiO2 nanoparticles, CdTe quantum dots,
aminopropyltriethoxysilane precursor, ammonium hydroxide and sodium hydroxide
catalysts
143
P-62
PHOTOTHERMAL EFFECT IN THE NEAR-INFRARED
REGION BY USING GOLD NANOPARTICLES
Vu Thi Thuy Duong*, Trinh Thi Thuong, Nghiem Thi Ha Lien,
Do Quang Hoa and Tran Hong Nhung
Institute of Physics, Vietnam Academy of Science and Technology
18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam
Email*: vtduong@iop.vast.ac.vn
Abstract.
Due to strong electric fields at the surface, thermal effects of gold nanoparticles are
strongly enhanced. Gold nanoshells (GNSs) and gold nanorods (GNRs) strongly absorb
and scatter light in the near-infrared (NIR) region, a distribution of them at depth in
tissue can be used to deliver a therapeutic dose of heat using an NIR light. In the
present work, we provide a research results on thermal effect caused by gold nanoshells
and gold nanorods in tissue under illumination of a continuous diode laser at 808 nm.
The local temperature variations vs. time of exposed tissue with injected GNSs and
GNRs, and their dependence on irradiation power were studied. Tissue without GNSs
and GNRs displayed no loss in viability after the same conditions of NIR illumination.
The results shown that gold nanoshells (2.3 x 1010 particles) and gold nanorods (5.4 x
109 particles) reached average maximum temperatures T = 40 ± 6°C and T = 47 ±
6°C at 35 W/cm2 for 10 min of exposure, respectively. This temperature can induce the
irreversible damage to tissue. Besides that controls treated without nanoshells and
nanorods demonstrated significantly lower average temperatures on exposure to NIR
light (T < 10°C). This study proves that gold nanoshells and gold nanorods are
promising in photothermal tumor therapy.
Keywords: gold nanoshells, gold nanorods, photothermal
144
P-63
ASSESSMENT OF THE BACTERICIDAL ACTIVITIES OF
LIGOHEXAMETHYLENE GUANIDINE HYDROCLORIDE BASE
ON THE WASTEWATER TREATMENTING OF TO LICH RIVER
Nguyen Viet Hung*, Nguyen Viet Bac, Tran Van Chung,
Vo Hoang Phuong, Nguyen Thu Huong
Institute of Material and Chemistry, Academy of Science and Technology Army, Viet Nam
Email*: viethung_chema@yahoo.com
Abstract.
Oligohexamethylene guanidine hydrochloride (OHMG) have powerful antibacterial,
more dominant than the other antimicrobial agents by inhibiting the activity of coliform
occured very fast, was not affected by pH and does not create toxic compounds to the
environment. The paper presents to testing value of the antibacterial activity of OHMG
based on wastewater disinfection process To Lich river. Review of OHMG advantage
over Chloramine B.
Key words: Polyhexamethylene guanidine hydrochloride, Oligohexamethylene
guanidine hydrochloride, antimicrobial polymer, wastewater treatmenting of To Lich
river.
145
P-64
COMPARABLE CONDITIONS FOR HETEROLOGOUS
EXPRESION OF ENDOCHITOSANASE OF BACILLUS CEREUS
HN90 IN ESCHERICHIA COLI AND PICHIA PASTORIS
Nguyen Thi Ngoc Lien1, 2, Vu Van Loi1, Ngoc Nghiem Minh1, Phi Quyet Tien1*
1
Institute of Biotechnology, Vietnam Academy of Science and Technology,
18 Hoang Quoc Viet Rd., Cau Giay Dist., Hanoi, Viet Nam
2
Hung Vuong University, Nong Trang Ward, Viet Tri city,
Phu Tho Province, Viet Nam
Tel: 84-4-38363257; Fax: 84-4-38363144; Email*: tienpq@ibt.ac.vn
Abstract.
Chitooligosacharides (COS) are mixture of oligomers mainly formed by the enzymatic
hydrolysis of chitosan, a modified carbohydrate polymer derived from the chitin, by
endochitosanase. COS have the wide-ranging applications in the production of
functional foods, pharmaceutics, and many industrial sectors as well. In fact, to
manufacture a high quantity of endochitosanase with high specific activity, the
microbial producers for enzyme production are of great importance. In this study, two
potential recombiant producers of endochitosanase Escherichia coli [pET22b::csn] and
Pichia pastoris X33 [pPICZαA::csn] were generated, in which the original chitosanaseencoding gene csn is from bacterial strain Bacillus cereus HN90. The capabilities for
expression of recombinant chitosanase (rCSN) by Escherichia coli [pET22b::csn] and
Pichia pastoris X33[pPICZαA::csn] were then evaluated and compared each other.
The experimental results revealed that the recombinant strain E. coli [pET22b::csn] was
able to express high intracellular rCSN activity (reached up 648.73 U/ml) in ampicillinsupplemented Luria-Bertani (LB) broth culture at temperature of 25°C, induction by 0.4
mM isopropylthiogalactoside (IPTG) for 6 hours, which was 1.99 times higher than that
produced by wide-type strain B. cereus HN90. Further studies on optimization of
medium component and fermentation conditions for expression of rCSN by E. coli
[pET22b::csn] showed that: (i) in shaking flask scale, rCSN activity gained 5464.08
U/ml after 9-hour induction by IPTG; in automated 7.5-liter-fermenter BioFlo 110 (New
Brunswick Scientific, USA), rCSN activity achieved 5779.56 U/ml after 6.5 hours of
induction, being 17.8 times higher than that produced by wild-type strain.
The new generated yeast transfomant Pichia pastoris X33 [pPICZαA::csn] L6 showing
the highest activity of rCSN was sellected among eight transformants growing well on
YPDS agar medium supplement with 1000 mg.ml-1 of antibiotic zeocine. The strain
Pichia pastoris X33 [pPICZαA::csn] L6 expressed the highest extracellular rCSN of
1512.9 U/ml in BMMY culture induced by methanol 1.5%(v/v) after 72-hour
cultivation, which was 4.6 times higher than that of wild-type and 2.3 times higher than
146
rCSN synthesized by E. coli strain BL21 [pET22b::csn]. In shaking flask, the
transformant P. pastoris X33 [pPICZαA::csn] L6 was able to improve the rCSN activity
(reached 18490.2 U.mL-1) when cultivated in modified BMMY medium consisting of
(g.L-1): yeast extract 15, peptone 10, potassium phosphate 100 mM, ammonium sulfate
10, biotin 4x10-5 and induced by 1.5 %(v/v) methanol at 28°C, initial pH of 6.0 for 69hour fermentation. In in automated 7.5-liter-fermenter BioFlo 110 (New Brunswick
Scientific, USA), the rCSN activity synthesized by the yeast strain P. pastoris X33
[pPICZαA::csn] L6 achieved 24388.1 U/ml afer 48-hour fermentation. Under the
optimized conditions, rCSN activity of the transformant L6 was 75.1 folds compared
with that of wild-type and 4.2 times higher than rCSN activity synthersized by E. coli
BL21[pET22b::csn] cultured in optimized conditions. However, the cultivation time for
rCSN production by yeast transformant L6 was longer than that of wild-type and E. coli
[pET22b::csn] as well. When using rCSN produced by both E. coli [pET22b::csn] and
P. pastoris X33[pPICZαA::csn] L6 for hydrolysis of chitosan, the COS product was
mainly of 2-6 monomers on TLC analysis.
The above mentioned results indicated that two recombinant microbes E. coli
[pET22b::csn] and P. pastoris X33[pPICZαA::csn] L6 generated in this study are
potential producers for high-yielded biosynthesis of rCSN.
Keywords: Bacillus cereus, chitooligosaccharides, Escherichia coli, expression,
recombinant endochitosanase, Pichia pastoris.
147
P-65
NEW INSIGHT INTO THE KINETIC FORMATION
OF HIGH-TC GeMn NANOCOLUMNS
Le Thi Giang*1, Nguyen Manh An1, Nguyen Van Hoa1, Le Thanh Vinh2
1
2
Hong Duc University, Thanh Hoa, Vietnam
CINaM - Centre Interdisciplinaire de Nanosciences de Marseille
Email*: giangle74@gmail.com
Abstract.
In recent years, diluted magnetic semiconductors (DMS), obtained by doping magnetic
metals into a host semiconducting matrix, have attracted great attention for their
potential in combining ferromagnetic and semiconducting properties in a single
material. Among various materials, Ge1-xMnx DMS appears to be a promising candidate
due to its compatibility with mainstream silicon technology. However, in standard
growth conditions the Curie temperature (Tc) of most DMSs studied up to now remains
relatively low, probably due to a very low solubility of the magnetic elements in
semiconductors.
148
In this work, we report on the formation kinetics and the compositions of high-TC Ge1xMnx nanocolumns grown on Ge(001) by MBE. We have successfully set up adequate
growth conditions to produce Ge1-xMnx nanocolumns exhibiting a TC well above 350 K.
We have made in use Atom Probe Tomography (APT) to investigate the Mn
composition along a nanocolumn and also in the Ge1-xMnx matrix. We provide evidence
that the nanocolumns are not a compound with a constant Mn concentration as being
currently believed [1] but a solid solution with Mn concentration varying from 5 % at
the interface to ~40% near the surface. When the Mn concentration reaches a value of
~40 %, nanocolumns become no longer stable, transforming into Mn5Ge3 clusters. The
kinetics of the nanocolumn formation will be discussed with respect to the Mn
segregation process and be corrected with the magnetic properties of three components
present in the film: nanocolumns, matrix and Mn5Ge3 clusters [2, 3].
LP-APT images: (a) Mn atoms (purple dots) in a single nano-column, (b) isoconcentration surfaces made in the same volume for three different Mn concentrations
5, 15 and 25 %, (c) Mn concentration versus depth in the single nano-column presented
in (a) (solid symbols) and in the matrix (open symbols). Scales are in nanometers.
149
P-66
THE EFFECTS OF MANGANESE CONCENTRATION ON
STRUCTURAL AND MAGNETIC PROPERTIES OF MnGe
DILUTED MAGNETIC SEMICONDUCTORS
Le Thi Giang*1, Nguyen Manh An1, Nguyen Van Hoa1, Le Thanh Vinh2
1
2
Hong Duc University, Thanh Hoa, Vietnam
CINaM - Centre Interdisciplinaire de Nanosciences de Marseille
Email*: giangle74@gmail.com
Abstract.
Diluted magnetic semiconductors (DMS) have recently attracted a great deal of
attention for their potential in combining ferromagnetic and semiconductor properties in
a single material. In which the host semi-conducting matrix is randomly substituted by
transition metal (TM) ion such as Mn, Cr, Ni, Fe, or Co. Among them, (Ge, Mn) seem
to be a promising candidate due to its compatibility with mainstream silicon technology.
However, Curie temperatures (Tc) of DMSs remain rather low for the very low
solubility of Mn in DMSs. Recently, many publications indicate a significant increase of
Tc in Ge1-xMnx materials depending on growth conditions but Curie temperature never
exceed 300K [1 - 2] There is an unique high-Tc (Tc> 400K) Mn-rich nano-columns
phase of Ge1-xMnx thin films for low growth temperatures and low Mn concentration
have been evidenced by M. Jamet et al [3].
In this work, we study the effects of Mn concentration on Ge1-xMnx DMS formation
grown on Ge(001) by molecular beam epitaxy (MBE). For a given substrate
temperature of 130 °C, we investigate the phase formation and the magnetic properties
of Ge1-xMnx epitaxial films as a function of the Mn concentration, ranging from 1% to
14%. With increasing the Mn concentration, we have identified by means of RHEED
and TEM analyses the formation of four successive phases: diluted mono-crystalline
DMS, mono-crystalline DMS with nanocolumns, polycrystalline, and finally an
amorphous phase at high Mn concentration. In particular, the mono-crystalline phase
containing Mn-rich nanocolumns exhibits a Curie temperature above 350 K, in good
agreement with previous work [4]. The magnetic and transport measurements for all the
samples were carried out in order to verify the formation of each phase.
150
Figure 1. Plane-view TEM image
exhibiting nanocolumns of an
average diameter of 5-6 nm.
Figure
2.
Temperature
dependent
magnetization displaying the co-existence of
three magnetic contributions.
151
P-67
SOME RESEARCH RESULTS ON ADHESIVE BASED EPOXY
MODIFIED BY , -BIS(METHACRYLOYLOXY) OLIGOMER
(TRIETHYLENE GLYCOL PHTHALATE)
Ho Ngoc Minh*, Do Dinh Trung, Do Quoc Manh
Institute of Chemistry and Materials science,
17 Hoang Sam Str., Cau Giay Dist, Ha noi, Viet Nam
Email*: minhquang8188@yahoo.com
Abstract.
An epoxy- acrylate oligomer resin system was used for many adhesives such as: K201,
K168, EP 201, EP211, EP 300… In this study, the curing behaviors of epoxy DER-331
resin with T-31 polyehtylene polyamine cure agent and ,  -bis(methacryloyloxy)
oligomer (triethylene glycol phthalate) was investigated using differential scaning
calorimetry (DSC), in the temperature range from 30-180 0C. The polymerization
mechanism for epoxy- acrylate was examined, and the DSC results matched the
mechanism. The determined mechanical strength results show this adhesive system is
higher adhesion, impact resistance and thermal shock than non-modified one.
152
P-68
COMBINED ZERO –VALENT IRON AND A2O BIOFILM system
PROCESSES TREATMENT OF TNT INdUSTRY
WASTEWATER
Vu Duy Nhan1*, Nguyen Thi Nhan1, Do Vinh Truong4, Le Duc Anh1, Vu Van Dung1,
Le Minh Tri1, Doan Thanh Huyen1, Tran Thi Nguyet1,
Do Binh Minh2, Luu Viet Hung3
1
Institute of Chemisty and Materials, Academy of Military Science and Technology,
Ministy of Defence, Vietnam.
2
Institute of New Technologys, Academy of Military Science and Technology,
Ministy of Defence, Vietnam.
3
Department of Military Science, Ministy of Defence, Vietnam.
4
Faculty of Biology, Hanoi University of Science, Vietnam National University
Email*:vuduynhan@yahoo.com
Abstract.
This work explores theoptimization of combined zero - valent iron with A2O biofilm
system was used for the treatment of TNT industry wastewater. The pretreatment by
zero - valent iron reduced TNT, CODof the wastewater to 115 ÷ 126, 250 ÷ 325 mg/l,
respectively, corresponding to the respective removal rate of 99.8%, 76 - 80%. The
biodegradability (BOD5/COD) of the wastewater was increased from 0.2 to 0.67 by the
Treatment. After the subsequent A2O biofilm treatment, the TNT and COD, of the
removal ratereached 100%, 91.4%. The experiment results indicated that this combined
system was stable and simple for the TNT industry wastewater with high efficiency.
Keywords：zero - valent iron, A2O biofilm system, TNT wastewater, biodegradability.
153
P-69
RECEIVED RESULTS OF MANUFACTURING AND
INVESTIGATED STRUCTURES, THERMODYNAMIC
PROPERTIES OF NITRILE RUBBER-NANOCLAY COMPOSITES
Do Quoc Manh
Institute of Chemistry and Materials science,
17 Hoang Sam Str., Cau Giay Dist, Ha noi, Viet Nam
Email: mhn_vips@yahoo.com
Abstract.
Nitrile rubber (NBR)/organic montmorillonite (o-MMT) composite were prepared by a
two-step method viz. preparation of a 3:1 (by weight) masterbaths of NBR and o-MMT
followed by compounding on intermixed Haake at 150 oC. The relative melt viscosity of
NBR and CKH26/o-MMT composite were evaluated according to changing of torque of
the materials during melt mixing process. Their structures were investigated with X-ray
diffraction (XRD) and TEM image. The response of material to oscillatory deformation
was measured using dynamic mechanical analysis (DMA). The results showed that the
torque of NBR/o-MMT composites increase with rising o-MMT content. The XRD
patterns indicated that NBR chains could be intercalated into the interlayer gallery of oMMT and interacted with o-MMT. The TEM image proved the existence of
nanostructure in the NBR/o-MMT composites. The storage modules (E‟), loss modules
(E‟‟) and tan (E‟‟/E‟) increased with the nano-filler content, reached the maximum
value at 4.5 phr.
154
P-70
THE TREATMENT FOR VARIOUS TYPES OF BONE
FRACTURE: THE APPLICATION OF LOW POWER
SEMICONDUCTOR LASER
Trinh Tran Hong Duyen*, Phan Van To Ni, Nguyen Tuan Kha
Tran Thi Ngoc Dung, Tran Minh Thai
Laser Technology Laboratory, University of Technology,
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email*: tt_hd2005@yahoo.com
Abstract.
In Vietnam, the common treatment for various types of bone fracture is plaster bandage
and furthermore. However, the patient is on pain-killers. This method is simple and
economical in the various medical facilities. The healing process of bone depends on
type of fracture and body condition. The healing bone process takes very long time and
cause a lot of disadvantages in daily activities of patient.
Our motivation of this study is application of low power semiconductor laser on the
healing bone process. Based on the effect of simultaneous two wavelengths, biological
responses (anti-inflammatory, analgesic, regenerative …) are ideal for the treatment. It
really helps the healing bone process and vascular system to recover.
A total of 35 patients who have been diagnosed with bone fracture are examined. Their
fracture is plaster bandage or fixed splint. We divide them into two groups:
- Group 1 (control group): 5 patients are in plaster bandage or fixed splint without
using laser therapy.
- Group 2 (laser group): 30 patients are in plaster bandage or fixed splint. They are
treated by laser therapy. The effect of simultaneous two wavelengths 780 nm and
940 nm directly interacts from plaster bandage or fixed splint to fracture.
The evaluation of bone healing is based on the results of X-ray before and after the end
of treatment. When the effect of simultaneous two wavelengths 780 nm and 940 nm
directly interacts from plaster bandage or fixed splint to fracture, it reinforces blood
microcirculation, anti-inflammatory injury, connective tissue and bony tissue
regeneration. The healing bone of group 2 is faster than that of group 1. During the
treatment process, we acknowledge no harmful side-effects on the health of patients.
The results of our research prove that the effect of simultaneous two wavelengths 780
nm and 940 nm is much more effective than the common treatment.
155
P-71
MONITORING THE BOUNDARY LAYER OVER HANOI
USING COMPACT LIDAR SYSTEM
Bui Van Hai*, Dinh Van Trung, Nguyen Xuan Tuan
and Dam Trung Thong and Nguyen Dinh Hoang
Center for technical physics, Institute of physics, Vietnamese Academiy of Science and
Technology, 10 DaoTan, BaDinh, HaNoi, VietNam
Email*: bvhaihsh@mta.edu.vn
Abstract:
Monitoring the top height of aerosol boundary layer is a significant parameter in the
studying of different atmospheric layers. The boundary layer also plays important role
for air quantity in urban areas such as Hanoi. A lidar system that allows regular
monitoring of the boundary layer for long periods and in all weather conditions is
necessary. We have developed a compact lidar system that can be used in the
monitoring of the boundary layer during the night time. Our lidar system at the physics
Institute of Vietnam uses laser diode at 905 nm wavelength with repetition rate of 1.25
kHz, average power 9.7 mW combined with the use of a photo detector based on
avalanche photodiode APD S9251 operated in photon counting Geiger mode. In this
paper, we present the initial measurements of the top height of boundary layer and
spatial distribution of the boundary layer versus time during night time. We have
compared the obtained results with different laser systems and to those from other
groups using more powerful lidar system.
Keywords: LIDAR - light detection and ranging, BL - boundary layer
156
P-72
CALCULATE AND OPTIMIZE THE DENSITY OF IONS Er3+
AND IONS Yb3+ IN THE ACTIVE MEDIUM OF ERBIUMGLASS LASER CONSISTENT WITH THE LABORATORY
CONDITIONS IN VIETNAM
Trinh Đinh Chien1 , Giang Manh Hung2 .
1
2
Hanoi University of Science – VNU,
Hà Nội – Amsterdam High school, No 1 Hoang Minh Giam – Ha Noi.
Email: khoigm02@yahoo.com
Abstract.
The main material of the active medium of Erbium glass laser is often made of
phosphate glass. Ions Er3+ is transplanted into the main material, the erbium emission
around 1.54 m has already been demonstrated since the 1960s of the 20th century.
However, the erbium weakness is narrow absobrtion band, so the perfomance of energy
transfer of Erbium laser pumped by flash-lamp is very low. To overcome this
weakness, ions Yb3+, is also transplanted into this material. The energy from flash-lamp
is transferred to ions Yb3+, the ions Yb3+ absorbs radiation pumped by flash-lamp, then
this transfer creates secondary radiation, and then this secondary radiation is retransfered from Yb3+ to Er3+. This process makes the Erbium ions from the energy level
4
I11/2 to a higher level, and laser radiation‟s transfer is de-excited from the Erbium
ions‟s level 4I13/2 to the basic level (4I15/2). This performance of Erbium laser‟s energy
transfer depends on the density of Er ions and Yb ions in the active medium. The
calculation to find optimal density of ions Er 3+ and ions Yb3+ in the active medium
consistent with the laboratory conditions in Vietnam is presented in this report.
Keywords: Active medium, Erbium-glass Laser, Flash-lamp.
157
P-73
THE LOCAL STRUCTURE AND EVOLUTION OF RELAXOR
BEHAVIOR IN BATIO3 - Bi(Zn0.5Ti0.5)O3 CERAMICS
Atipong Bootchanont1*, Saroj Rujirawat1, 2, Rattikorn Yimnirun1,
Ruyan Guo3, Amar Bhalla3
1
School of Physics, Institute of Science, Suranaree University of Technology and COENANOTEC-SUT on Advanced Functional Nanomaterials, Nakhon Ratchasima 30000, Thailand
2
ThEP Center, CHE, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
3
Department of Electrical and Computer Engineering, College of Engineering,
University of Texas at San Antonio, Texas 78249, USA
Abstract.
In this work, we have studied the local structure relate to relaxor ferroelectric behavior
of (1-x)BaTiO3- xBi(Zn0.5Ti0.5)O3 (x=0.05-0.13) ceramics. The evolution of relaxor
behavior of (1-x)BaTiO3- xBi(Zn0.5Ti0.5)O3 (BT-BZT) solid solution respect to the
increasing Bi(Zn0.5Ti0.5)O3 content in BaTiO3 induce to the phase transition of tetragonal
to rhombohedral structure, is analyzed by XRD technique. In addition, the local atomic
structure of Ti atoms in BT-BZT was investigated by synchrotron x-ray absorption
spectroscopy. Investigation of dielectric constant on various temperatures, exhibit the
phase transition from narmal ferroelectric to relaxor. The determination of evolution of
polar regions in relaxor ferroelectricity with a characteristic cooperative freezing
temperature follows Vogel-Fulcher relation on frequency dependence.
158
P-74
APPLICATION OF WAVELET TRANSFORM FOR LOCALIZER
STATION IN INSTRUMENT LANDING SYSTEM
Phan Thanh Vu*1, Mai Thanh Phong1, Duong Thi Cam Tu1, Nguyen Thanh Dung2
1
Faculty of Electrical and Electronics Engineering,
University of Technical Education of Ho Chi Minh City,
Vo Van Ngan Str. 1; Thu Duc District, Ho Chi Minh City
2
Faculty of Aeronautical Electronics–Telecommunication Engineering,
Vietnam Aviation Academy,
104 Nguyen Van Troi st., Phu Nhuan Dist, Ho Chi Minh City, Vietnam.
Email*: phanthanhvukdd@gmail.com
Abstract.
This paper presents the use of Wavelet Transform and Higher Order Statistics to reduce
noise in Instrument Landing System. The Wavelet Transform was used to reduce noise
in the received signal. Interference was eliminated by specifying thresholds for Wavelet
Transform coefficients of the received signal. The selection thresholds would depend on
the permission of Higher Order Statistics of the Wavelet transform coefficients. Using
thresholds based on Higher Order Statistics permission to allow more effective than
noise estimation method, especially in the condition the signal-to-noise ratio very small.
The results showed that, the Wavelet Transform and Higher Order Statistics were able
to remove noise from two-signal. In addition, it‟s also to reduce the effects of radio
frequency to the system.
159
P-75
FLUORESCENT PROPERTIES OF CANCEROUS LIVER TISSUE
Nguyen Thi Khanh Van1*, Nguyen Dinh Hoang1, Nguyen Cong Thanh1,
Nguyen Thanh Binh1, Nguyen Quoc Khanh2
1
Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, Vietnam
2
354 Hospital, Hanoi, Vietnam
Email*: ntkvan@iop.vast.ac.vn
Abstract.
Fluorescence spectroscopy is a technology used fruitfully for biomedical diagnostics as
well as for therapeutic purposes. The fluorescent analysis method applied in biomedical
diagnostics bases upon whether or not fluorescence of endogenous or exogenous
fluorophores. We initially applied fluorescence spectroscopy for the study of human
liver cancer (hepatocellular carcinoma) with an exogenous fluorophores, Radachlorin®
0.35 %. The main aim of this study is to determine the spectral variation between
normal and malignant liver tissues in 2 cases: the samples expose and non - expose to
Radachlorin. The autofluorescence spectrum measurements of hepatocellular carcinoma
samples were carried out. We also measured the fluorescence spectra of these samples
after the tissue samples had exposed to Radachlorin solution. The excitation wavelength
used for the fluorescence measurements is 405 nm.
Key words: autofluorescence, Radachlorin®, hepatocellular carcinoma, liver cancer
160
P-76
MASS SPECTROMETRY INVESTIGATION OF PLASMA
CHEMISTRY IN PLASMA ENHANCE CHEMICAL VAPOR
DEPOSITION DISCHARGES
The Anh Nguyen1, Van Kha Nguyen2, Mike Froehlich3,
Hoang Tung Do2,*and Holger Kersten3
1
Institue of Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
2
Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, Vietnam
3
Institute of Experimental and Applied Physics, Christian-Albrechts University, Kiel, Germany
Email*: dhtung@iop.vast.ac.vn
Abstract.
Metal organic precursors are frequently used in plasma processes for the deposition of metal
oxide layer. However the plasma chemistries of these plasma enhance chemical vapor
deposition (PE-CVD) are not well understood.In the present work, the fragmentations of
precursor in an Ar plasma with admixture of aluminum tri-isoproxide (ATI) has been studied by
means of mass spectrometry (MS). The experiments were performed in an asymetric
capacitively coupled reactor at frequency of f = 13.56 MHz and a pressure of up to 12 Pa. The
discharge power was in the range of P = 10 – 100 W. The temporal evolution of the
concentrations of stable molecules like CH4, H2O, C2H2, C2H4 and transient species like H, CH3,
C2H3 as well as their ions were monitored in the plasma.The evolution of C3H7O in both ion and
neutral forms arestrictly studied. It showsaextremely fast formation followed by a moderate
decrease when plasma was turned on which implied that ATIis fragmented by detachmentof
isoproxide group from the precursor by electron impact.
161
P-77
TREATMENT OF HYPERTENSION AND CEREBRAL
HEMORRHAGE BY LOW-POWER LASER INTRAVASCULAR
METHOD IN THAI NGUYEN PROVINCIAL HOSPITALE
Van Thien Bui1*, Van Toan Hoang2, Thi Nga Le2, Xuan Thuy3, Pham Van Hoi4
Thai Nguyen University of Medicine and Pharmacy
Institute of Materials Science, VAST, Vietnam
Email: buivanthientn@gmail.com
Abstract:
The low-power laser therapy, including intravascular laser, method has been applied to
treatment of many kinds of diseases in the hospitals and clinics in Thai Nguyen
province for last decade. In this report, we present the primary results of using the
intravascular low-power laser method for treating patients with hypertension and
cerebral hemorrhage caused by accident in Thai Nguyen Hospital. The results show that
intravascular method used low-power laser of visible wavelength range is effectively for
treatment of cerebral hemorrhage
Key words: Medical laser, laser intravascular method.
162
P-78
CURRENT TRENDS OF EXPLOSIVE RESIDUE ANALYSIS
IN THE ASIAN REGION
Mohamad Afiq Mohamed Huri*1, Umi Kalthom Ahmad1, and Mustafa Omar1
1
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,
81310 UTM Johor Bahru, Johor Darul Ta’zim, Malaysia
Science & Technology Research Institute of Defense (STRIDE),
48100 Batu Arang, Selangor, Malaysia
Email*: afiqhuri91@gmail.com
Abstract.
Increased terrorist activities around the Asian region have resulted in the need for improved
analytical techniques in forensic analysis. Recent media reports on terrorist bombings have
raised the awareness of law enforcers and forensic researchers to study explosives components
in depth [1]. Bombing activities that occurred in the past few years such as the Bali bombing in
2002 and the Jakarta bombing in July 2009 have all involved home-made explosives that were
made from both low and high explosive materials [2]. These acts of terrorism have spurred the
need for the analysis of explosive residues. In forensic investigation, the aims of analysis are
related to post-explosion products that are usually obtained from bombing sites. From the
samples collected at crime scene, the type of explosive used can be determined and used as
evidence in court to link the suspect with the crime. This study was therefore conducted to
review on the current trends (Figure 1) of bombing activities and analytical techniques on
explosive trace analysis from the past few years particularly in the Asian region [3].
No of Publication
Keywords: bombings, trends, explosive analysis
low explosive
80
60
high explosive
40
20
total
0
95' 96' 97' 98' 99' 00' 01' 02' 03' 04' 05' 06' 07' 08' 09' 10' 11' 12' Year
Fig. 1: Distribution of journal publication on low explosive and high explosive
based on SCOPUS database journal publication from year 1995-2012
163
P-79
REASEARCH ON THE ENGINEERING OF THE SOLID
STATE LASER PUMPED BY DIODE LASER
Khoi Giang Manh, Tien Do Xuan, Hieu Pham Chi
Centre for Technology Development and Transfer National Centre for Technology Progress Hanoi, VietNam;
Abstract:
Diode Laser pumping has been used since the early days of the development of lasers.
Diode Laser pumping has become a very important pumping technique since efficient
and high-power diode lasers have been developed and widely available in many
wavelengths. When we use diode lasers to pump other solid state lasers, we can produce
an all-solid state laser. Diode pumped lasers are becoming more and more important in
laser machining. So if there are lasers whose light wavelengths are within the absorption
bands of the active medium, we can use these laser lights for pumping. Since the
bandwidth of laser light is very narrow, the pumping efficiency can be very high. The
research on the technology of the solid state laser pumped by Diode Laser is presented
in this report.
Keywords: high-power, solid state laser.
164
P-80
THE EFFECT OF BENIGN PROSTATIC HYPERPLASIA ON
URETHRA AND BLADDER FUNDUS: Insight from Simulation
Tran Minh Thai, Tran Anh Tu*, Nguyen Dinh Quang, Nguyen Minh Chau,
Nguyen Dinh Thien Tam, Vo Duy Trung
Laser Technology Laboratory, University of Technology
Vietnam National University – Ho Chi Minh City
268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
Email*: tranatu@hcmut.edu.vn
Abstract.
Benign prostatic hyperplasia (BPH) in case of the old males, which leads to difficulties
in normal life, is frequently not only in Vietnam but also all over the world. Until now,
Uroflowmetry is used to perform preliminary tests in this case. This method can only
show the blockage symptom but not clearly define the cause of the syndrome. In this
study, we use ANSYS to model and analyze the simulation in order to figure out the
cause of the bladder flow limitation and define the factor of the blockage symptom.
These include:
1. Building the model includes three parts: the transaction ball represents the
bladder, 4.4cm long 6mm diameter urethra, 10cm long urethra with 90 degree bending
with previous part. We simulate the deformation of urethra due to the pressing of the
prostate gland in different cases, especially the prostate gland center part. This will
provide us the fundamental theory of the effect of BPH on the bladder fundus
inflammation.
2. In fact, the BPH takes place in different parts of the prostate gland, but not all
parts simultaneously. In this study, we simulate the BPH in different cases: front part,
center part, rear part, left part and right part. This can give deep insight about the effect
of BPH on the urethra and bladder fundus. Based on the model in (1), we calculate the
flow in urethra in effect of BPH so that we can observe, have a general view either of
the turbulent flow in pressing urethra or the large enhanced pressure on the urethra wall.
165
P-81
OPTIMUM DESIGN OF SINGLE-MODE DIODE END-PUMPED
SOLID-STATE Cr:LiSAF LASER CAVITY
Nguyen Van Hao 1, 2*, Pham Hong Minh 1, Do Quoc Khanh1 and Pham Huy Thong1
1
Center for Quantum Electronics, Institute of Physics (VAST), 10 Dao Tan, Ba Dinh, Hanoi
2
Faculty of Physics & Technology, Thai Nguyen University of Science, Vietnam
Email*: haonv08@gmail.com
Abstract.
We present our study of optimal design for resonators of single-mode diode endpumped solid state laser. The optimum cavity geometries are calculated using the
ABCD Gaussian beam formalism for intra-cavity. We found that the arms length and
mirrors position affect the laser mode size and its stability condition. The cavity designs
for a Cr:LiSAF laser pumped by single-mode end-diode laser is discussed for two
different configurations: V-folded and Z-folded cavities.
Keywords: Optical resonator, diode end-pumped lasers, solid-state lasers, cavity
design.
166
P-82
GENERATION OF SHORT LASER PULSES
FROM SINGLE - MODE DIODE LASER AT 660 nm
Nguyen Van Hao 1, 2*, Dam Trung Thong 1, Nguyen Dinh Hoang 1,
Pham Huy Thong 1 and Pham Van Duong 1
1
2
Center for Quantum Electronics, Institute of Physics (VAST)
10 Dao Tan, Ba Dinh, Hanoi, Vietnam
Faculty of Physics & Technology, Thai Nguyen University of Science, Vietnam
Email: haonv08@gmail.com
Abstract.
The experimental results in research and development of a single-mode diode laser in
short-pulsed laser operation at 660 nm are presented. Laser pulses as short as 100 ps and
peak powers of 812 mW at a pulse repetition rate of 8 MHz were obtained. The circuit
is based on high rate IC which emit electrical pumping pulses less than 1 ns FWHM.
The compact, low-cost laser source be useful to many applications in research and
training.
Keyword: short pulse diode, single-mode diode, picoseconds laser
167
P-83
DESIGN AND DEVELOPMENT OF LASER PULSE
STRETCHER AND COMPRESSOR
Pham Hong Minh*, Pham Van Duong, Do Quoc Khanh, Nguyen Van Hao
Pham Huy Thong, Nguyen Dai Hung
Center for Quantum Electronics, Institute of Physics, VAST
10 Dao Tan, Ba Dinh, Hanoi. Vietnam
Email*: phminh@iop.vast.ac.vn
Abstract:
The laser pulse stretcher and compressor system have been designed and developed
using a grating pair. The pulse stretching and compression are strongly dependent on its
optical configuration such as the grating constant, laser wavelength, incident angle and
the distance between gratings. The research is for the development of high-power
ultrashort laser based on the Chirped Pulse Amplification (CPA).
Keywords: Ultrashort laser, laser amplification, pulse stretcher and compressor.
168
P-84
BORATE-TELLURIDE GLASSES DOPED WITH Dy3+ ION:
FLUORESCENCE AND APPLICATIONS
Sengthong Bounyavong 1*, V. X Quang 2, Ho Van Tuyen 2
1
Faculty of Science, National University of Lao, Vientiane, Laos
2
R&D Center, Duy Tan University, Da Nang, Vietnam
Email*: sengthong_bounyavong@yahoo.com
Abstract:
Dysprosium-doped borate-telluride glasses with composition (35+x)B2O3-9.52ZnO-(45x)Te2O3-10NaO-0.5Dy2O3; (x=0, 10, 20, 30) have been synthesized by melt-quenching
method. The absorption spectra were observed and the Judd-Ofelt intensity parameters
have been calculated. The luminescence and excitation spectra have been carried out
and the typical luminescence bands of Dy3+ ion (blue B and yellow Y bands are
corresponding to the 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions, respectively) were
studied and discussed.
The Y/B ratio was used as the probe to obtain the information about the covalence and
the asymmetry of the crystal field in the surrounding of the Dy3+ ion. Besides that, by
using the Y/B ratio as the monitor parameter, we could determine the optimal
component of the glasses, which could emit the white light.
169
P-85
LIFE TIME AND DEPHASING TIME OF LYCOPENE
DETERMINED BY SPECTRALLY RESOLVED ONE AND TWOCOLOR FEMTOSECOND PHOTON ECHOES
Vuong Van Cuong1, 2, Nguyen Dai Hung2, Dao Van Lap3
1
2
Faculty of Physics, Hanoi National University of Education,
136, Xuan Thuy, Cau Giay, Hanoi, Vietnam
Institute of Physics, Vietnam Academy of Science and Technology,
10, Dao Tan, Ba Dinh, Hanoi, Vietnam
3
Centre for Atom Optics and Ultrafast Spectroscopy,
Swinburne University of Technology, Melbourne, Australia
Email: cuongspvl@gmail.com
Abstract:
Spectrally resolved one and two - colour, four-wave mixing coherent spectroscopy is
used to investigate the population dynamics and coherence dynamics in lycopene. The
life time of lycopene is studied by measurements of spectrally resolved one - colour
femtosecond photon echo. By using appropriate wavelengths for the three laser pulses
in two - colour measurements, the vibrational relaxation times in excited state 1Bu 
and ground state 1Ag  are determined. The experimental results are well fitted with the
simulated one to choose the best population and decoherence time.
170
O-42
EXOPLANETS
(Invited talk)
Ernst van Groningen
International Science Program (ISP), Uppsala University, Sweden,
Box 549, 75121 Uppsala, Sweden
171
INTERNATIONAL SCIENCE PROGRAM AT UPPSALA
UNIVERSITY, SWEDEN
Ernst van Groningen
Uppsala University, Sweden, Box 549, 75121 Uppsala, Sweden
172
O-43
Au/TiO2 PLASMONIC STRUCTURAL SOLAR CELL:
DESIGN, TECHNOLOGICAL DEVELOPMENTS AND
SEVERAL OBTAINED EXPERIMENT RESEARCH RESULTS
Nguyen Thi Thuy*1, Vu Van Cat 2, TranVan Viet2,
Phan Anh Tuan 1 and Dao Khac An 1
1)
Materials and Devices Energy Lab., Institute of Materials Science (IMS), VAST
2
PhD and Master students at Materials and Devices Energy Lab., IMS, VAST
18 Hoang Quoc Viet Road, Cau Giay, Ha Noi, Vietnam
Email*: thuynt85hy@gmail.com; (cc. andk@ims.vast.ac.vn)
Abstract.
Recently one of the biggest challenges ahead of human kind is to ensure the energy
security or energy sustainable. This challenge has to be answered with a low-cost
solution using abundantly available raw materials with high technology to produce the
renewable energies sources where the process-technology harnessing the power of the
Sun with photovoltaic technologies appears to be the only reasonable large scale answer
to the energy challenges.
Up to recently there are three solar cells generations; among them the noble metal
nanoparticles dye sensitivity solar cell, so called the plasmonic structural solar cells, is a
promise new type. The most important structure in plasmonic solar cell is the integrated
noble metal nanoparticle (Au(Ag)/ TiO2 (ZnO, Si…). Plasmonic nanostructures support
the formation of resonant surface plasmons in response to a photon flux, localizing
electromagnetic energy close to their surfaces. Unfortunately the plasmonic structural
solar cell recently is still at the first stage development and it has also many research
issues, including both aspects of the theoretical and practical problems that must be
overcome.
This paper briefly outlines some recent situations and challenges of both theoretical and
practical problems concerning the plasmonics solar cells, after that, reports about
several the obtained experiment research results including the solar cell design,
technology developments for the production of Au/TiO2 embedded solar cell samples
and the morphological structural properties using SEM, TEM ,AFM, EDX…techniques,
and the electrical-optical properties (I-V dark-light , open voltage Voc and short circuit
current Isc) depending on the produced technology conditions, nanoparticles sizes of the
embedded system of Au/TiO2.
173
O-44
PHOTOCATALYTIC ACTIVITY OF VANADIUM AND
NITROGEN CODOPED TiO2 THIN FILMS: THEORETICAL
AND EXPERIMENTAL STUDY
Phung Nguyen Thai Hang1, 2, Nguyen Huu Ke1, Duong Ai Phuong1
and Le Vu Tuan Hung1
1
University of Science Ho Chi Minh City,
2
Tay Nguyen University
Abstract.
Vanadium (V) and nitrogen (N) codoped TiO2 thin films (TiO2:(V, N)) were prepared
by the solgel method. In this study the effects of V and N doping on the photocatalytic
properties of TiO2 thin films were researched. All samples were characterized by UVVis spectroscopy, X-ray diffraction (XRD), SEM and photo-degradation of methylene
blue solution. The experimental results show that doping of V and N ions improves the
visible absorption range, so TiO2:(V, N) thin films have better photocatalytic activity
under visible light. Meanwhile, the TiO2:(V, N) models were built. The geometric
structure, band structure and density of states of all models were simulated by the DFT
method to study the mechanism for the enhanced photocatalytic activity of TiO2. The
theoretical calculations confirm the experimental results.
Keywords: DFT, TiO2:(V, N), band structure, solgel, density of state, ....
174
O-45
OPTICAL PROPERTIES OF ERBIUM DOPED
PHOSPHATE GLASS
Nur Aina Mardia Adnan*, Md. Rahim Sahar
Advanced Optical Material Research Group, Department of Physics, Faculty of Science,
Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
Email*: rahimsahar@utm.my
Abstract.
Series of glass based on (70 - x)P2O5 – 10 MgO – 20 ZnCl2 – x Er2O3 where 0 ≤ x ≤ 2.0
mol % has been successfully prepared by melt-quenching technique. The glass has been
characterized by means of XRD, Density, UV-Vis and PL spectroscopy. X-Ray
Diffraction pattern shows no definite peaks indicating the amorphousity of glass.
Physical property of glass by means of density has been determined to be in the range of
2.69 to 2.75 gcm+3 increasing with the Er3+ content. For UV-Vis absorption peaks, the
optical band gap energy, Eopt has been estimated in the range of 4.00 – 3.75 eV for
direct transmission, decreasing with the increment of Er3+ content. Meanwhile, the
urbach energy is found to be in the range of 0.78 – 0.61 eV decreasing with the addition
of Er3+ content. From the photoluminescence spectra a significant emission spectra have
been observed indicating up-conversion luminescence corresponds to 534 nm. All the
results will be discussed with respect to Er3+ content.
Keywords: phosphate glass, optical energy gap.
175
O-46
EXPANDING THE PHOTORESPONSE RANGE OF TiO2
MESOPOROUS BY CdS/CdSe/ZnS NANOSTRUCTURE
CO - MODIFICATION
Thanh Tung Ha1, Thanh Nguyen Nguyen1, Quang Vinh Lam2, Thanh Dat Huynh3
1
Faculty of physics, Dong Thap University, Dong Thap province, Vietnam.
2
University of Science, Viet Nam National University - HCM City, Vietnam
3
Viet Nam National University - HCM City, Vietnam
Email: tunghtvlcrdt@gmail.com
Abstract.
In a previous study, we have successfully synthesized CdSe quantum dots (QDs) by
colloidal method [J. Am. Chem. SOC. 132, 2130]. Results show narrow
photoluminescence and high absorption of the overall spectrum from the
ultraviolet region to the visible light region. The solution reaches a steady state in three
months. In this letter, we have prepared CdS/CdSe/ZnS thin films by successive ionic
layer adsorption and reaction method. Results show a wider photoresponse range of
TiO2 mesopores from the ultraviolet region to the visible light region. Sequentially
assembled CdS/CdSe/ZnS QDs exhibit significantly improved light-harvesting ability
and photocurrent efficiency. A high efficiency of 1.52% is obtained.
176
O-47
EPITAXIAL GROWTH OF GRAPHENE ON 4H-SILICON
CARBIDE SUBSTRATE BY SIMULATED ANNEALING
METHOD
L.H.Chien*1, S.K.Lai2
1)
2)
Department of Nuclear Physics, Faculty of Physics – Engineering Physics,
University of Science, 227 Nguyen Van Cu, Ho Chi Minh City, Vietnam
Complex Liquids Laboratory, Department of Physics, National Central University,
Chungli 320 Taiwan
Email*: chienlhphys@gmail.com
Abstract:
In this work, we grew graphene epitaxially on 4H-SiC(0001) substrate by the simulated
annealing method with applying the potential proposed by Erhart and Albe [1].The our
obtained result is that the annealing temperature just coming to see graphene is
approximately 1300 K which is close to the experimental result findings of Hannon and
Tromp [2] who reported to have observed the formation of flat graphene films at
temperature below 1473 K. We also evaluated the reasonableness of our layered
graphene by considering carbon-carbon average bond-length, binding energy and pair
correlation function.
Key work: graphene, simulated annealing method.
177
O-48
INVESTIGATION OF PARAMETER OF HPGe DETECTOR
USING MCNP5 AND PENELOPE CODE
Tran Thien Thanh1*, Huynh Thi Yen Hong2, Vu Ngoc Ba2,
Huynh Dinh Chuong2 and Chau Van Tao1
1
2
Nuclear Technique Laboratory, University of Science, VNU – HCM,
227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
Faculty of Physics and Engineering Physics, University of Science, VNU – HCM,
227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
Email*: ttthanh@hcmus.edu.vn
Abstract.
In this work, Monte Carlo (PENELOPE2008 and MCNP5 software packages)
simulation were used to investigate the effect of simulation parameters such as cut-off
energy of photons and electrons on the detector response function and peak escape
intensity to assess their influence on the efficiency determination. The results showed a
general agreement between the two codes, however both the intensity of escape peaks
and total efficiency computed with PENELOPE 2008 are higher than those obtained
with MCNP5. The effect of HPGe response function is also shown.
Keywords: full energy peak efficiency, total efficiency, Monte Carlo simulation.
178
O-49
MONOGENIC WAVELET TRANSFORM:
EXTENSION TO MULTISPECTRAL SIGNAL
Thai Ba Chien
Department of Information and Communication Technology,
University of Sciences and Technologies of Hanoi (USTH),
18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
Email: thaibachien@gmail.com
Abstract.
Monogenic wavelets offer a geometric representation of grayscale images through an
AM/FM model allowing invariance of coefficients to translations and rotations. The
underlying concept of local phase includes a fine contour analysis into a coherently
unified framework. Starting from a link with structure tensors, the XLIM-Icones team
(University of Poitiers, France) proposes a non-trivial extension of the monogenic
framework to vector-valued signals to carry out a non-marginal color monogenic
wavelet transform. They also give a practical study of this new wavelet transform in the
contexts of sparse representations and invariant analysis, which helps to understand the
physical interpretation of coefficients and validates the interest of our theoretical
construction. A rich feature set can be extracted from the structural multivector, which
contains measures for local amplitudes, the local anisotropy, the local orientation, and
two local phases. Both, the monogenic signal and the structural multivector are
combined with an appropriate scale-space approach, resulting in multispectral filtering.
So it codes the signal in a more coherent way than standard wavelets.
179
O-50
PHOTODECOMPOSITION OF PARAQUAT DICHLORIDE
USING ZIRCONIUM DOPED TITANIA AS PHOTOCATALYST
UNDER UV IRRADIATION
Nur Afiqah Badli1*, Rusmidah Ali1 and LenyYuliati2
1
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,
81310 UTM, Johor Bahru, Johor, Malaysia.
2
Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia,
81310 UTM, Johor Bahru, Johor, Malaysia.
Email*: rusmidah@kimia.fs.utm.my
Abstract.
Over the past few decades, titania (TiO2) has been widely investigated for the
decomposition of organic pollutants. Incorporation of metal oxide as a dopant has been
reported to show significant enhancement for the photocatalytic activity compared to
single TiO2. In this study, a series of zirconium doped TiO2 calcined at 750°C were
successfully prepared via modified solgel method. Thephotocatalytic activity of
prepared photocatalyst were evaluated by studying the decomposition of paraquat
dichloride (1.1 - dimethyl - 4.4‟- bipyridylium dichloride) under UV irradiation.
Optimization has been done at different dopant ratios (10:90, 20:80 and 30:70) and
catalyst loadings (0.1 to 0.4 g).The characterization of the photocatalystwere carried out
using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEMEDX) and UV-vis NIR spectrophotometer to studythe crystallinity, surface
morphologies, band gap energy and optical properties of prepared phocatalysts.Mixture
of anatase and rutile phases with nanosize range from 20 to 40 nm were elucidated from
the XRDand FESEM analysis.Zr doped TiO2 with dopant ratio 20:80 yielded the
highest decomposition of paraquat dichloride under UV irradiation compared to10:90
and 30:70. Besides that, increasing the catalyst loading from 0.1g to 0.3 g has shown
remarkable increment of the decomposition from 79.82% to 84.41%, respectively.
Keywords: photocatalytic activity, decomposition, zirconium, TiO2, sol-gel
180
O-51
EVALUATION OF SUATURATION CURVE OF ALUMINUM
USING GEANT4 CODE
Huynh Thi Yen Hong1*, Nguyen Thi Tram2, Vu Ngoc Ba1, Nguyen Ngoc Lam1,
Lu Anh Huong2, Huynh Dinh Chuong1, Le Thi Ngoc Trang1, Bui Tuan Khai1,
Tran Kim Tuyet1, Hoang Duc Tam1, Tran Thien Thanh2, Chau Van Tao2
1
2
Nuclear Technique Laboratory, University of Science, VNU – HCM,
227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
Faculty of Physics and Engineering Physics, University of Science, VNU – HCM,
227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
3
Faculty of Physics, Ho Chi Minh City University of Pedagogy,
280 An Duong Vuong Street, District 5, Ho Chi Minh City, Vietnam
Email*: htyhong@hcmus.edu.vn
Abstract.
In this work, GEANT4 software package was used for measuring thickness gauging
model of aluminum plates, which is based on a gamma-ray scattering technique. Its
performance has been evaluated by experiments at angle of scatter is 1000, using Co60
source and detector NaI(Tl) 7.62 cm × 7.62 cm. The simulation result of the saturation
curve for aluminum plates is 6.14 ± 0.31 cm. It is shown that the calculated values with
the gamma scattering system are in good agreement with experimental data. Further
investigation was required to determine the thickness of the various materials of target
using gamma-ray scattering technique.
Keywords: GEANT4, single peak, target thickness, saturation curve.
181
O-52
SILICA FIBER TIP AND MICROSPHERE INTERACTION
Le Huu Thang*1, Pham Van Hoi2, Dinh Van Trung3, Pham Thanh Son2,
Nguyen The Anh2, Nguyen Thuy Van2, Bui Quoc Thu1
1
Vietnam Metrology Institute, Directorate for Standards, Metrology and Quality,
8 Hoang Quoc Viet Road, Cau Giay District, 10000 Hanoi, Vietnam.
2
Institute of Materials Science, VAST,
18 Hoang Quoc Viet Road, Cau Giay District, 10000 Hanoi, Vietnam
3
Institute of Physics, VAST, 18 Hoang Quoc Viet Road, Cau Giay District,
10000 Hanoi, Vietnam
Email*: lhthang2001@gmail.com
Abstract.
In this paper, we proposed a physical model for fiber tip – microsphere interaction. The
numerical results of the model at wavelength 1567 nm was reported. The results were
analysed and the consistency with the experimental values was seen. The report also
suggested possible values for fiber tip length in order to decrease the safe distance
between the tip – sphere so that the opportunity of mode structure exploration in
subwavelength region would be possible.
Keywords: whispering gallery mode, microcavity, optical comb, evanescent field.
182
O-53
THE ROLE OF PRASEODYMIUM OXIDE BASED CATALYST
IN METHANATION REACTION
Salmiah Jamal Mat Rosid*, Wan Azelee Wan Abu Bakar, and Rusmidah Ali
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: salmiahjamal88@gmail.com, wazelee@kimia.fs.utm.my
Abstract.
Malaysia energy demand on natural gas is increasing which has led to purify the sour
natural gas by removing carbon dioxide using catalytic conversion. Methanation
reaction has become a promising method for purification of natural gas by converting
waste pollutant gas CO2 to wealth CH4 gas for the used in combustion. The methanation
and catalysts have been extensively explored and this process could increase the global
price of natural gas as well as quality of natural gas. Praseodymium oxide is preferred
due to its properties that suitable to produce catalysers, polish glass and also as alloying
agent to create high strength metals that used in air aircraft engines with magnesium.
Therefore, a series praseodymium oxide catalyst supported on alumina and doped with
noble metals was prepared by wetness impregnation method. The catalysts were
calcined at 400 oC for 5 hours at the screening reaction. The lower performance of
monometallic and bimetallic oxide catalysts have steered the trimetallic oxide catalyst.
Ru/Mn/Pr (5:35:60)/Al2O3 calcined at 800 °C gave 76 % of CO2 conversion by using
FTIR and yielded about 17 % of CH4 at reaction temperature of 400 °C. Stability test
showed that the performance of catalyst was increased and stable up to 7 hours with 96
% of CO2 conversion. X-ray Diffraction (XRD) and Field Emission Scanning Electron
Microscope (FESEM) showed that the supported catalysts are amorphous in structure.
EDX analysis revealed that there was 1.02 % reduction of Ru in the Ru/Mn/Pr
(5:35:60)/Al2O3 used catalysts compared to fresh catalysts. Meanwhile NA analysis
revealed that Ru/Mn/Pr (5:35:60)/Al2O3 catalyst is in mesoporous structures which
attained surface area of 134.39 m2/g.
Keywords: natural gas, methanation, praseodymium oxide
183
O-54
STUDYING THE FAST NEUTRON ACTIVATION AND X-RAY
FLUORESCENCE TO DETERMINE THE CONCENTRATION
OF SOME ELEMENTS IN GEOLOGICAL SAMPLE
Luu Dang Hoang Oanh, Trinh Quang Thanh, Huynh Truc Phuong
Department of Nuclear Physics, Faculty of Physics and Engineering Physics,
University of Science-Ho Chi Minh city, Viet Nam
Email: ldhoanh@hcmus.edu.vn
Abstract:
In this thesis, neutron activation system and X-ray fluorescence system in the
Department of Nuclear Physics were researched and developed to analyze the
concentration of some elements in geological sample. First, some standard samples and
analyzed samples were prepared. Then, they were irradated by fast neutron channel.
Base on nuclear reactions such as Al27(n, p)Mg27and Fe56(n, p)Mn56, the net area of
radioactive isotopes (Mg27 and Mn56) were measured. In addition, samples were excited
by X-ray tube using Ag target and Cu filter. Specific X rays of Fe element were
recorded. Relative standardization method (in neutron activation analysis) and internal
standardization method (in X ray fluorescence) were applied to determine the
concentration of Al and Fe in geological samples. Finally, the results of these methods
were considered and compared.
Key words: neutron activation, X - ray fluorescence, Am-Be source, X- ray tube.
184
O-55
ADDITION OF Cu AND Ni ONTO BaO CATALYST FOR
CATALYTIC DEACIDIFICATION REACTION OF
NAPHTHENIC ACID IN PETROLEUM CRUDE OIL
Norshahidatul Akmar Mohd Shohaimi*, Jafariah Jaafar
and Wan Azelee Wan Abu Bakar
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: jjaafar@gmail.com
Abstract.
Naphthenic acid (NA) is a carboxylic acid derivative compound commonly found in the
petroleum crude oil. The presence of these compounds contributes to the acidity of crude
oils and is one of the major sources of corrosion in oil pipelines and distillation units in
crude oil refineries. Removing NA compounds from crude oils is regarded as one of the
most crucial processes in heavy oil upgrading. Current industrial practices either depend on
dilution or caustic washing methods to reduce the Total Acid Number (TAN) of heavy
crude oils. However, neither of these approaches is entirely satisfactory. For instance,
blending a high TAN crude oil with a low TAN one may reduce the naphthenic acid content
to an acceptable level, but the acidic compounds remain and the value of the low TAN oil is
diminished. Caustic treatment can substantially remove NAs, but the process generates
significant amounts of wastewater and emulsions that are problematic to treat.In order to
overcome this problem, catalytic deacidification method has been developed to reduce the
TAN values incrude oil. In this study, three different types of crude oil namelyPetronas
Penapisan Melaka Heavy (Crude A) and Light Crude (Crude B) and Korean Crude (Crude
C) were investigated. This method produced lower TAN of crude oil with a simple reaction
process and cost reduction. The parameter used in this study were different type of dopants,
different catalyst calcination temperatures and different concentrations of base chemical.
Ammonia solution in ethylene glycol (NH3-EG) was used as a basic chemical and barium as
a catalyst. The results show that with presence of Cu and Ni impregnation BaO catalyst, the
reduction of TAN in all three types of crude oil is higher than only using BaO catalyst.
Cu/Ba/Al2O3 with calcination temperature of 1000oC gave a better reduction than
Ni/Ba/Al2O3 for all three types of crude oil with 73.4% of TAN reduction (4.21 to 1.12) for
crude A, 65.4 % for crude B (2.43 to 0.84) and 42.7% for crude C (8.32 to 4.77).The best
catalyst undergo several characterization method such as X-Ray Diffraction Spectroscopy
(XRD) and Field Emission Scanning Electron Microscopy - Energy Dispersive X-Ray
(FESEM-EDX) to analyze its physical properties. XRD diffractograms illustrate that Cu/Ba
(10:90)/Al2O3 catalyst is highly amorphous with domination of alumina cubic phase.
FESEM micrograph of the catalyst showed the formation of aggregation and agglomeration
with undefined shape and mixture of larger and smaller particle sizes.
Keywords: Catalytic deacidification, Crude oil, Catalyst, Naphthenic acid
185
O-56
THE SENSITIVE DETECTION OF NITRIC OXIDE BY
WAVELENGTH MODULATION ABSORPTION
SPECTROSCOPY USING A FREQUENCY-QUADRUPED
CURRENT-MODULATED SYSTEM
Lemthong Lathdavong*, Phoukeo Thathilat and Vetpany Syvongxay
Department of Physics, Faculty of Science, National University of Laos, Lao PDR
Email*: lemthong2009@gmail.com
Abstract:
Nitric oxide (NO) has been detected by Wavelength Modulation Absorption
Spectrometry (WMAS) with a frequency-quadruped system. A fully-Diode-Laser-Based
(DLB) laser system producing mW powers of ultraviolet (UV) light was used to target
the overlapping 𝑄22(21/2) and 𝑄𝑅12(21/2) lines of 𝛾(0,0) band within the X 2  A2 
electronic transition at wavelength of 226.6 nm. The work verifies of a FrequencyQuadruped Current-Modulated System addressing electronic transitions in NO given in
an accompanying work. The detection limit of NO can conveniently be fined as the
partial pressure of 0.0125 Torr, roughly corresponding to 1.6 ppm·m for the
atmospheric pressure sample. In the future, the 1st, 2nd and 3rd harmonic spectra are
accomplished to show that it is possible to detect samples using the frequency
quadruped system combined with the WMAS technique that can find practical
applicability.
186
O-57
ELABORATION OF Fe(III)-TiO2 BY OXO-TiO2 CLUSTERS
DOPING IN A MICRO-MIXING SOL-GEL REACTOR.
APPLICATION IN PHOTOCATALYSIS
Siteng TIENG1, 2, Andrei Kanaev2 and Khay Chhor2
1
Chemistry Department, Royal University of Phnom Penh, Cambodia
2
Laboratoire des Sciences des Procédés et des Matériaux, LSPM, CNRS, Université Paris Nord,
Sorbonne Paris Cité, France
Abstract.
The main objective of this PhD work, is to highlight the interest of the micromixing in
the sol-gel supported Fe(III)-TiO2 synthesis and to study the role of the dopant in the
process of photocatalytic degradation of ethylene. The elaboration of photocatalyst was
carried out from titanium tetraisopropoxide (TTIP) and iron acetylacetonate (Fe(acac)3)
precursors. A turbulent micromixing of the injected fluids enables homogeneous
reaction conditions in the reactor bulk and monodispersity of the produced nanoparticles
[1]. Fe(acac)3 is injected into the solution at the nucleation stage. The doping agent
takes surface sites of TiO2 nanoparticles resulting in stable Fe(acac)3▬oxo-TiO2
complex. The reaction progresses by elimination of the residual acac until the formation
of Fe(III)-TiO2 complex, in which Fe can coordinate three TiO2 nanoparticles. The
released acac groups passivate the surface of the composite nanoparticles and slow
down the induction kinetics [2]. We show that the micromixing quality is critical even
in case of the apparently slow sol-gel induction kinetics.
Immobilization of highly reactive colloids was performed by nano-coating. The
photocatalytic activity was conducted in a fixed bed tubular reactor. The best
performance is obtained for material doped with 0,005 at.% and treated at 350°C. The
best performance found is explained by a competition between VB-hole localisation on
Fe3+ and its annihilation on Fe2+. The proposed model permits an estimation of the
localisation distance of the CB electron in anatase TiO2 after a photoexcitation and
defines the optimal size for the nanoparticulate TiO2photocatalyst to be ∼ 8 nm [3].
The Langmuir-Hinshelwood model was proposed to describe the kinetics of ethylene
photooxidation in the concentration range 35 to 300 ppm. It results in the average order
in reactor closer to 1 which signifies that reaction rates depend essentially on the
reagents concentrations [3].
Keywords: Sol-gel proccess, Iron doping, Photocatalysis, Charges recombination,
Ethylenephotodégradation.
187
O-58
THE PERFORMANCE OF SARAL/AltiKa IN COASTAL REGION
Da Nguyen Dac1, 2, Fernando Niño 2, Florence Birol 2, Denis Blumstein 2, 3
1
University of Science and Technology of Hanoi (USTH), 18 Hoang Quoc Viet, Hanoi, Vietnam.
2
3
CTOH/LEGOS, 14 Av. E. Belin, 31400 Toulouse, France
CNES/CST, 18 av. E. Belin, 31409 Toulouse Cedex, France
Email: nguyendacda@gmail.com
Abstract.
SARAL/AltiKa is the first Ka band altimeter which was launched early in 2013 to
follow the mission of ENVISAT. Due to its high frequency (35 Ghz) compared to
traditional Ku band (13.6 GHz), it is expected to achieve improvements in the quality of
altimetric data especially in coastal region. At the moment, with only 3 cycles of data,
the goal of this study is to give the very first picture about the performance of
SARAL/AltiKa in coastal region. It is first done by illustrating the advantage of having
high frequency in coastal region using modeling and looking at the real waveforms. Ka
band altimeter was found to have smaller footprint and thus smaller distance to coast to
which the waveform is contaminated by the presence of land than Ku band altimeter.
Next, in order to assess the quality of the data, we developed for the first time the base
for the choice of data editing criteria. Before this study, there was no scientific base for
the choice and users of altimetry data often had to base on their experience to edit their
data. We have found that the bad 1-Hz SSHA data mainly come from the bad quality of
the altimeter range but not from geophysical corrections and the range root mean square
alone, instead of more than ten indicators, is good enough for editing data. Finally we
used the range root mean square for data editing to investigate the performance of
SARAL in coastal region by calculating the distribution of bad data with respect to
distance to coast.
Keywords. Altimetry, data editing criteria, AltiKa, waveform, coastal region, outlier
188
O-59
IN-DEPTH OF SURFACE PROPERTIES INVESTIGATION
OVER CERIA BASED CATALYTS FOR CARBON DIOXIDE
METHANATION
Susilawati Toemen*, Wan Azelee Wan Abu Bakar and Rusmidah Ali
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,
81310 UTM, Johor Bahru, Johor, Malaysia.
Email*: wazelee@kimia.fs.utm.my
Abstract.
The development of ceria based catalyst impregnated with RuMn/Al2O3was found to be
considerably active for promoting the CO2methanation reaction. The investigation of
RuMnCe/Al2O3 catalysts on the ceria loading and calcination temperature can
significantly affect the catalytic performance.The optimum conditions were achieved
with 65 wt% of cerium loading and calcination temperature of 1000oC which gave
97.73% CO2 conversion with 53.32% of methane formation at reaction temperature of
200oC.It can be of great benefit to the environment and the national economy since the
methane gas produce can be used as a fuel to run the turbine for electricity generation in
power plant system. Therefore, this research is focused on the investigation of
physicochemical and surface properties of RuMnCe-65/Al2O3 catalysts on its cerium
loading and calcination temperature. XRD diffractogram showed that the catalyst still
having polycrystalline structure with the mixture of Mn4+ and Mn3+ although had being
calcined at high temperature of 1000oC. Meanwhile, FESEM analysis indicated a
morphology which looks like staghorn coral morphology with the smallest particle size
of 86 nm and the highest BET surface area of 47.65 m2/g. Such characteristics provide
the space for the access of active metal components to attract CO2 and H2 molecules on
the catalyst surface resulting an increasing of CO2 methanation activity.
Keywords: methanation, power plant system, carbon dioxide, ceria, surface properties
189
O-60
TRITERPENOIDSFROM PHALERIAMACROCARPA (SCHEFF)
BOERL (THYMELAEACEAE)
SitiNur Atiqah Md Othman* and Norazah Basar
Department of Chemistry, Faculty of Science, UniversitiTeknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
Email*: norazah@kimia.fs.utm.my
Abstract.
Fourtriterpenoids identified as 24 - methyl - 9.19 – cyclolanost – 25 - en - 3- ol (1), 24methylene-cyloartan – 3 - one (2), β-sitosterol (3) and stigmasterol (4) were successfully
isolated fromPhaleriamacrocarpa. Triterpenoids (1) and (2) were isolated from the
chloroform extract of the fruits while compounds (3) and (4) were obtained from the n hexane leaf extract. Purification of the crude extracts was carried out using various
chromatographic techniques such as vacuum liquid chromatography and column
chromatography. All the structures of the isolated compounds were confirmed by
spectral (IR, NMR, GC-MS) analysis and by comparison with the literature data. This is
the first report of the isolation of these triterpenoids from P. macrocarpa.
Keywords: P. macrocarpa, triterpenoids, fruits, leaves.
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190
(2)
(4)
O-61
EFFECT OF OXIDATION-EXTRACTION SYSTEM ON THE
DESULFURIZATION OF MALAYSIAN PETRONAS DIESEL
Wan NurAini Wan Mokhtar*1, Wan Azelee Wan Abu Bakar1,
Rusmidah Ali1, Abdul Aziz Abdul Kadir2
1
Department of Chemistry, Faculty of Science, UniversitiTeknologi Malaysia,
81310 UTM Johor Bahru, Johor, Malaysia
2
Department of Petroleum Engineering, Faculty of Petroleum & Renewable Energy
Engineering, UTM, 81310 UTM Johor Bahru, Johor, Malaysia.
Email*: wazelee@kimia.fs.utm.my
Abstract.
The oxidation desulfurization of commercial Petronas diesel fuel was carried out using
tert-butyl hydroperoxide (TBHP) as oxidizing agent, and later the oxidized organosulfur
compounds were separated by N, N-Dimethylformamide (DMF) extraction. The
influences of the volume ratio of solvent-to-oil (extraction only), TBHP ratio, reaction
temperature and reaction time on the desulfurization of diesel fuel were investigated.
The optimum operational conditions were obtained as follows: DMF volume ratio of 1,
TBHP ratio of 3, a reaction temperature of 45℃ and a reaction time of 30 min. Under
such conditions the removal rate of organosulfur and the recovered yield of diesel oil
were 84.4% and 90.1%, respectively.
191
O-62
SURFACE PROPERTIES OF SOME NITRAMINE
COMPOUNDSAND BINDERS
Ngô Văn Giao, Đỗ Xuân Thanh*, Chu Chiến Hữu
Military institute of science and technology
Email*: thanhxom@gmail.com
Abstract.
In this article, wetting ability of some binders (including: paraffin, ceresin, silicone,
wax8 and PE) on surface of crystal nitramine compounds((1, 3, 5, 7-tetranitro - 1, 3, 5,
7-tetraazacyclooctane (HMX) and 1, 3, 5-trinitro-1, 3, 5-triaazacyclohexane (RDX))
was presented, by using analysis pure solvents: water, glycerol, ethylene glycol, benzyl
alcohol, chloroform, acetone and Wilhemy plate method on DCA 315 system. The
obtained results are: surface tension, interface tension, work of adhesion, and spreading
coefficient. The results show that there are three binders can be used with nitramine
compounds including wax8, silicone and ceresin. In particular, each binder is suitable
for specific purposes.
192
O-63
ENERGY AND NUTRIENT RECOVERY FROM
SLAUGHTERHOUSE WASTEWATER TREATMENT
Le Anh Bang1*, Stalder T2., Le Niniven C., Dagot C.3
Water – Environment – Oceanography (WEO) University of Science and Technology of Ha Noi (USTH) Building 2H, VAST,
18 Hoang Quoc Viet, Cau Giay, Ha noi.
1
GRESE – ENSIL - Université de Limoges, 16 rue Atlantis 87068 Limoges cedex FRANCE
2
SPCTS – ENSIL- - Université de Limoges, 16 rue Atlantis 87068 Limoges cedex FRANCE
3
Email*: banglevs@yahoo.com
Abstract.
Slaughterhouse effluents represent a source of pollution that can impact the
environment if they are mistreated, but also, a potential source of energy, in terms of
biogas and materials such as phosphorus in terms of fertilizers of Magnesium
Ammonium Phosphate Hexahydrate (MAP). In this study, the treatment of
slaughterhouse effluent was tested under anaerobic reactor through the analysis of the
biogas production and the evolution of carbon, phosphorus, and nitrogen matter. After
21 days, soluble COD and total COD were removed from 77.0 % to 80.1% and 11.96 %
to 13.5 %, respectively. However, the total N and total P contents of slaughterhouse
wastewater increased. The biogas production was 305 mL of biogas/g of removed COD.
To improve the biogas-recovery efficiency, the wastewater was pretreated by enzymes
(lipase, protease etc.,) before conducting the anaerobic treatment. This resulted in an
increase of matter degradation and an average biogas recovery of 1.68 liter of
biogas/liter of treated wastewater, which increased to 30.8 %. In another hand, the
struvite precipitation experiments were performed in different conditions: before and
after anaerobic treatment, with and without enzymatic pretreatment. Phosphorus
precipitation from anaerobic treated effluent was more effective than solutions without
this treatment (11.61 ± 0.19 g.L-1 of MAP compare to 1.12 ± 0.24 without treating). The
efficiency was not affected by enzyme pretreatment. The quality of struvite was
performed by X-ray diffraction. Besides the above auspicious results, the struvite
precipitation following anaerobic treatment still ensured the wastewater treating
efficiency and obtained the removal of 77.9 % soluble COD, 96.6% total P and 74.7 %
total N.
Keywords: anaerobic digestion; slaughterhouse; biogas-recovery; Magnesium
Ammonium Phosphate Hexahydrate; struvite.
193
O-64
SYNCHRONIZATION BETWEEN TWO CHAOTIC LORENZ STENFLO SYSTEMS VIA EVOLUTIONARY ALGORITHM
Nguyen Thanh Dung
Faculty of Aeronautical Electronics – Telecommunication Engineering,
Vietnam Aviation Academy, 104 Nguyen Van Troi st., Phu Nhuan Dist, Ho Chi Minh City,
Vietnam.
Email: thanhdungvaa@gmail.com
Abstract:
The main aim of this paper is to present the combination of chaotic signal and
evolutionary algorithm to estimate the unknown parameters in four dimensions chaos
synchronization system via Pecora-Carroll method. The genetic algorithm was used to
estimate the unknown parameters. Based on the results from evolutionary algorithm,
two identical chaotic systems were synchronized.
Keywords: chaos system, identical synchronization, genetic algorithm, 4D LorenzStenflo system, Pecora-Carroll method.
194
O-65
ELECTRICAL AND THERMAL STUDY ON FERROELECTRIC
PHASE TRANSITION OF TRIGLYCINE SULPHATE
Sun Limhuor 1, and Ken-ichi Tozaki2
1
Royal University of Phnom Penh, Cambodia,
2
Chiba University, Japan.
Abstract.
This study was conducted to grow TGS crystal from aqueous solution
Triglycine Sulfate, (NH2CH2COOH )3 .H2 SO4 , (abbreviated TGS) , and to measure
the thermogram and the displacement current of the TGS crystal simultaneously by
scanning the temperature. Both measurements show an anomaly correspondingly at
around 49℃ . The displacement current indicates the occurrence of spontaneous
polarization parallel to the b-axis. The thermogram shows the same profile reported in
the literature, which is typical one for second order phase transition. From the detailed
discrepancy in thermogram between on cooling and on warming, it is suggested that the
ferroelectric phase is unstable and would change on the time and/or thermal history
(temperature protocol).
Keywords: TGS crystal, ferroelectric phase transition, electrical and thermal
measurement, simultaneous measurement of thermogram and displacement current
195
O-66
THE EFFECT OF CAPACITY OF SHEET PILE SHALLOW
FOUNDATION UNDER HORIZONTAL LOADING ON CLAY
Chamroeun Chhun1*, Pongsakorn Punrattanasinb2
Department of Civil Engineering, KhonKaen University, KhonKaen 40002, Thailand
Email*: chamroeunc@yahoo.com
Abstract.
This research is to promotehow to effect of bearing capacity of sheet pile shallow
foundation under horizontal loading on clay. The concept of a series of 1 g modeling
tests was conducted on clay. In this test, two types of experimental as vertical and
horizontal loading were contributed. Two of model types seem shallow foundation and
shallow foundation surrounded by sheet pile were used in the experiment. In this study,
the relationships of load-settlement of failure surface in V-H wereconsidered. The
results of load-settlement were controlled by using load cells and linearly variable
differential transducers (LVDTs). The result of effective of trend on horizontal
capacities combined by V-H concept applied on shallow foundation surrounded by
sheet pile were showed that the load greatermore compared to shallow foundation.
Moreover, the horizontal capacity can greateradapted on the length of sheet pile.
Keyword: Shallow foundation, sheet pile, vertical capacity, horizontal capacity, clay.
196