Abstract

33 PL 01 THAILAND'S SOLAR PHOTOVOLTAIC DEVELOPMENT TOWARD STRATEGIC POSITIONING IN ASEAN Amornrat Limmanee Solar Energy Technology Laboratory, NECTEC, National Science and Technology Development Agenc[.]

PL-01 THAILAND'S SOLAR PHOTOVOLTAIC DEVELOPMENT:TOWARD STRATEGIC POSITIONING IN ASEAN Amornrat Limmanee Solar Energy Technology Laboratory, NECTEC, National Science and Technology Development Agency (NSTDA), 112 Thailand Science Park, Thanon Phahonyothin,Tambon Klong Nueng, Amphoe Klong Luang, Pathum Thani 12120, Thailand E-mail: amornrat.limmanee@nectec.or.th Abstract Solar photovoltaic (PV) is one of the world's most promising energy sources and is on the way to competing in the energy sectors Each PV technology is at different stages of maturity which affects significantly their market opportunity.A number of emerging and novel PV technologies are under investigation with a potential for high-efficiency and low cost, some of which are beginning to emerge in the marketplace for niche applications It is important to look at advantages and limitations of the different types of PV technologies, because it helps us to choose technologies which are well suited to Thailand and also points out the problems that may arise in the future Various fields of science and technology are necessary for PV development, e.g material science, electronics, physics, chemistry, computer and information science R&D efforts are important all along the value chain of energy generation; from raw material production to the manufacturing of PV modules and balance-of-system components R&D is also needed at system level, especially in terms of improving system efficiency by minimizing avoidable losses and improving the product requirements for building integration Better efficiency, lower cost, lower energy consumption and longer operational lifetime of PV modules are main R&D targets of the PV field Owing to abundant solar energy resources and policy support by its government, Thailand is one of the countries where the growth of solar farms is rapid and it is still expected to be one of the emerging PV markets However, at present Thai solar PV industry still relies heavily on imported part and components Even though it is difficult for Thailand to make a breakthrough technology to develop super high-efficient solar cells or to produce products at the lowest cost and compete primarily on price, the technologies that can enhance energy yield/efficiency and stability of the PV systems, especially in high temperature regions, possibly help the local PV industries to expand their exiting business/service or to start a new one Furthermore, it is a big chance for the PV testing facilities in Thailand to provide services, especially outdoor testing under real operating conditions (Tropical climate) This paper aims to give a brief overview of the current status of solar PV development in Thailand Recommended strategies from a technical point of view to raise Thailand's potential for competition among ASEAN have been also proposed [1] References S Tongsopit, S Chaitusaney, A Limmanee, N Kittner, P Hoon (2015) Scaling Up Solar PV: A Roadmap for Thailand, Chapter 3, Energy Research Institute Chulalongkorn University 33 PL-02 POROUS SILICON STRUCTURE AND ITS DEVELOPMENT INTO A MOSAIC SILICON OXIDE STRUCTURE IN THE METAL-ASSISTED ANODIC ETCHING OF SILICON Dao Tran Cao1*, Cao Tuan Anh2, and Luong Truc Quynh Ngan1 Institute of Materials Science -Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam; Tantrao University, Yenson, Tuyenquang, Vietnam *E-mail:dtcao@ims.vast.ac.vn Abstract Generally porous silicon (PSi) is fabricated by anodic etching of silicon in a solution of hydrofluoric acid (HF) diluted with water and/or ethanol It is well known that in the etching process Si is removed either by the direct reaction of Si with HF to form the soluble H 2SiF6 (direct dissolusion), or by the reaction of Si with water to form SiO 2, then this SiO2 will react with HF to form the soluble H2SiF6 (indirect dissolusion) Generally it is thought that even when silicon is dissolved indirectly, then immediately after etching, on the PSi surface will not rest any oxygen Because if there is any SiO2remained, the HF in solution will dissolve it completely We have discovered that during Si anodic etching, both the etching mechanismsmentioned above have occurred, and the higher the anodic current density (Ja), the more dominant the indirect mechanism of silicon dissolution.Moreover, there is a possibility that SiO2 is retained in the etching process when the HF concentration in the solution is sufficiently small More specifically, if the Si anodic etching is carried out in a solution with a given (small enough) HF concentration but with different Ja, then at higher Ja there will be more remaining SiO2 on the surface of PSi At a sufficiently large value of Ja, remaining SiO2 will create a continuous film covering the entire surface of etched Si At a greater value of Ja, the SiO2 thin film becomes thicker, and it seems that due to the mismatch in thermal expansion coefficients of the Si substrate and SiO2 amorphous film, SiO2 layer will be cracked, forming mosaic pieces On one hand, the oxide is cracked in places with many defects, and on the other hand, the cracks reveal silicon substrate,therefore at the places of the crack, etching will go sideways and downward, creating trenches.It is very interesting that mosaic silicon oxide structure emits photoluminescence (PL) light in the red wavelength region with the PL intensity tens times higher than that of the PSi structure 34 PL-03 CONTROLLING OPTICAL BISTABILITY IN FIVE-LEVEL CASCADE EIT MEDIUM A Dinh Xuan Khoa, Le Van Doai, and Nguyen Huy Bang* Vinh University, 182 Le Duan Street, Vinh City, Vietnam E-mail*:bangvinhuni@gmail.com Abstract We propose to use a five-level cascade medium excited by a coupling and a probe laser fields under the present of electromagnetically induced transparency (EIT) to study optical bistability (OB) behaviors The OB occurs simultaneously in three spectral regions that corresponding to EIT transparent windows Furthermore, switching intensity thresholds and the hysteresis loop can be controlled with the parameters of the coupling light and/or a cooperation of the atomic medium Such controllable OB behaviors can find interesting applications in bistable photonic devices working with low-light intensity at multiple frequencies Keywords:Optical bistability; Kerr effect; Coherent optical effects 35 PL-04 ENGINEERED BACTERIOPHAGE NANOCARRIERS FOR TARGETED GENE DELIVERY TO CANCER CELLS Teerapong Yata National Nanotechnology Centre, 111 Thailand Science Park, Phahonyothin Road, Khlongnueng, Khlongluang, Pathumthani 12120, Thailand E-mail: teerapong@nanotec.or.th Abstract Bacteriophage (also known as phage) is a virus of bacteria that cannot infect human or other animals Recently, the development of M13 filamentous bacteriophage as novel nanomaterial has attracted attention for the development of nanocarriers The efficacy of cancer gene therapy by the phage-based vector was achieved through vascular-targeted gene delivery to the angiogenictumour vasculature Specifically, we genetically engineered the bacteriophage to display a tumourtargeting RGD4C ligand and to carry a CMV promoter-driven transgene cassette flanked by the Inverted Terminal Repeats (ITR) from adeno-associated virus (AAV2) The use of this vector showed significant efficacy in several animal models of cancer, including pet dogs with spontaneous cancers.Recently, wereported a series of improvements for targeted cancer gene therapy by phage vectors, including tetra-functional phage and cationic polymers These vectors combine multiple fusion peptide display on various coat proteins, which confer the ability of AAVP to escape from mammalian degradative pathways and alter its electrostatic charge Furthermore, the phage platform has also been combined with drug treatment, such as proteasome or histone deacetylase inhibitors, which studies show dramatic enhancement of gene transfer When compared to the original vector, current technologies have allowed us to increase the gene delivery efficiency of AAVP vectors by several times.Overall the success of our strategies presents a breakthrough in systemic delivery of the therapeutic gene by tumour-targeting bacteriophage 36 PL-05 NUMERICAL AND EXPERIMENTAL STUDIES OF MIXED-HOST ORGANIC LIGHT EMITTING DIODES Riku Chowdhury, Teng-Sian Ong, Yeh-Yee Kee, Seong-Shan Yap, Teck-Yong Tou* Faculty of Engineering, Multimedia University, 63100 Cyberajaya, Selangor, Malaysia Abstract Electrical characteristic and luminance of three mixed-host organic light emitting diodes (OLEDs): namely the uniformly mixed, step-wise graded and mixed, and continuously graded and mixed, were compared with the conventional hetero-junction OLED in both numerical and experimental studies These mixed-host OLEDs were fabricated by a mixed-source thermal evaporation process, and half-cell devices were also fabricated to provide some input parameters for OLED simulations The current efficiencies were largely influenced by their device structures and strongly agreed with the computed current balance factors The improved mixed-host OLED performances can be discussed with aid from simulations, which include spatial distributions of electron and hole, carrier mobility, electric field profiles, the total recombination rates in the light emitting layer 37 O-01 THE ADVANCE TECHNIQUE FOR NANOTECHNOLOGY Chutchai Juntasaro Scientific Division, HORIBA Instruments (Singapore) Pte Ltd, Changi Business Park Vista #0101, Akzonobel House Singapore 486051 E-mail: Chutchai.juntasaro@horiba.com Abstract Nanotechnology is the scientific pursuit of life This contributes to improving the QoL (Quality of Life) and the progress of drug development and medical treatment, and is connected to mankind‘s ultimate concern and also living life in good health Nanotechnology play a large role in materials characterization, and the understanding of this mechanism from a physicochemical aspect greatly contributes to our understanding of life We have applied high-precision optical and sensing technologies to this industry which were cultivated in various fields starting with advanced materials, and we contribute to the realization of living life in good health Every compound has a function and a role, as aggregates HORIBA‘s technology helps to clarify the connection between these types of life phenomena (functions) and expression mechanisms 38 O-02 COMBINING MICROCAVITY AND PLASMONIC EFFECTFOR NOVEL PHOTONIC DEVICES Van Hoi Pham*, Huy Bui, Van Dai Pham, Quang Minh Ngo, The Anh Nguyen Institute of Materials Science, VAST, 18 Hoang Quoc Viet Rd., Caugiay Dist., Hanoi, Vietnam *E-mail: hoipv@ims.vast.ac.vn Abstract In this paper we present the results of research and development for novel photonic devices performed by combining microcavity and thin metallic-coated film, which has strong enhancement emission by surface plasmonic effect We have developed a configuration of microsphere cavity based on Er-doped silica glass, which coated by different thin film metals such as Au, Al, Pt and multi-layer graphene Various important scientific and technological applications of novel photonic devices such as ultra-low power operation of microcavity laser, inhibition of spontaneous emission and manipulation of light amplification by combining surface plasmonic effect and microcavity are expected In addition, we developed new kind of photonic structures for optical filter based on guided-mode resonances in coupled slab waveguide gratings, which have good large potential for application in the fiber-optic communication and optical sensors Keywords:Photonic structures, optical micro- and nano-devices, surface plasmonics 39 O-03 CHARACTERISTICS OF SOLID-STAE ULTRAVIOLET LASERS USING Ce: LiCAF CRYSTAL Pham Van Duong1, Nguyen Xuan Tu1, Pham Hong Minh1*, Nobuhiko Sarukura2 and Nguyen Dai Hung1 Institute of Physics, Vietnam Academy of Science and Technology 10 Dao Tan, Ba Dinh, Hanoi, Vietnam Institute of Laser Engineering, Osaka University, Suita Osaka 565-0871 Japan E-mail*: phminh@iop.vast.ac.vn Abstract The experimental results in research and development of all solid state ultraviolet lasers using Ce3+:LiCaAlF6 (Ce:LiCAF) material as a gain medium are presented The fourth harmonic generation at 266 nm from a nanosecond Nd:YAG laser was used as pumping laser The Ce:LiCAF laser characteristics are investigated with different output coupler, resonator length and configuration Maximum output power of 40 mW and a slope efficiency of about 33% is feasible A short-pulse Ce:LiCAF UV laser emission can be obtained by using a laser resonatorof low-Q, short length and operated at threshold pump energy Keywords:ultraviolet, laser material, transient cavity 40 O-04 OPTICAL SPECTROSCOPY OF Eu3+ IONS IN ALUMINOSILICATE GLASS Sengthong Bounyavong1,2* and Phan Van Do3 Duy tan University, Da Nang City, Vietnam Department of Physics, Faculty of Natural Sciences, University of Laos, Laos P.D.R National Thuyloi University, 175 Tay Son, Dong Da, Ha Noi, Vietnam *E-mail: sengthong_bounyavong@yahoo.com Abstract Eu3+ -dopedaluminosilicate (AlSiO) glass with the concentrations of 1,0 wt % was prepared by Solgel method.Optical excitation and emission spectra of Eu3+ ions have been investigated at room temperature The phonon sideband (PSB) associated with the 7F0-5D2 excitation transition is used to determine the electron–phononcoupling constant and the local structure of the local environment around Eu3+ ions The luminescence intensity ratio of the 5D0-7F2 to 5D0-7F1transition has been calculated to estimatethe local site symmetry around the Eu3+ ions The Judd–Ofelt (J–O) intensity parameters Ωλ (λ=2,4,6) were calculatedfrom the emission spectra and are used to estimate the transition probability(A), branching ratios (β), the stimulated emission cross-sections (σλp) for the excited levels 5D0 of the Eu3+ ions Keywords: Sol-gel method, aluminosilicate glass, Judd- Ofelt theory 41 O-05 FLUORESCENCE RESONANCE ENERGY TRANSFER (FRET)BASED BREAST CANCER BIOSENSOR USING NANOPARTICLE/APTAMER-BASED COMPLEXES Vu Van Son1, Nguyen Thi Thuy1, Nguyen Thi Bich Ngoc1, Le Quang Huan2, Nguyen Thi Thai An1 and Tran Hong Nhung1* 1) 2) Institute of Physics, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau giay, Hanoi, Vietnam Institute of Biotechnology, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau giay, Hanoi, Vietnam *E-mail: thnhung@iop.vast.ac.vn Abstract Aptamers are short, synthetic, single-stranded nucleic acid segments that bind with strong affinity and selectivity for a target molecule of interest The main requirements of effective biosensors are high selectivity and sensitivity for the target, making aptamers ideal building blocks for biosensors In this study, we used the HER2 aptamer in a Fluorescence Resonance Energy Transfer (FRET)based biosensor The HER2 aptamer sequence was divided into two segments: one of the segments (the FRET donor) was modified with a dye-doped silica nanoparticle (SNP), and the other (the FRET acceptor) was modified with a gold nanoparticle (GNP) The size of the GNPs was chosen to have FRET overlap with the SNPs FRET experiments with the donor and the acceptor in the presence and absence of the target (HER2 antigen) were realised The results show that the HER2 antigens can be detected in the range 1pg – 1ng Fig.1.The principal scheme of the FRET-basend sensor 42 ... Viet, Hanoi, Vietnam; Tantrao University, Yenson, Tuyenquang, Vietnam *E-mail:dtcao@ims.vast.ac.vn Abstract Generally porous silicon (PSi) is fabricated by anodic etching of silicon in a solution... Huy Bang* Vinh University, 182 Le Duan Street, Vinh City, Vietnam E-mail*:bangvinhuni@gmail.com Abstract We propose to use a five-level cascade medium excited by a coupling and a probe laser fields... Phahonyothin Road, Khlongnueng, Khlongluang, Pathumthani 12120, Thailand E-mail: teerapong@nanotec.or.th Abstract Bacteriophage (also known as phage) is a virus of bacteria that cannot infect human or