Mr
Komsun Rapaway
(School of Physics, Institute of Science, Suranaree University of Technology, Nakorn Ratchasima, THAILAND 30000)
5/20/15, 2:00 PM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
ZnO nanowires have been widely studied due to their unique direct wide band gap of 3.37 eV making it attractive for electronics, optical detectors and light-emitting diodes application. In this work, we focus on ZnO nanowire-metal junction. N-type ZnO nanowires were growth vertically on a silver substrate (of ratio1:1of HTMA:Zinc nitrate) by hydrothermal process at the varied concentration....
Ms
Piramon Hampitak
(Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
5/20/15, 2:15 PM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
Manganese dioxide (MnO${}_2$) is one of the most studied electrode materials for use in supercapacitors due to its distinguished properties such as high specific capacitance, environmental compatibility, and low cost. In this study, local and electronic structures of Mn in MnO${}_2$ electrode have been investigated by in situ X-ray absorption spectroscopy technique. *In situ* Mn *K*-edge XANES...
Irada Theppabut
(Department of Physics, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok, THAILAND 10140)
5/20/15, 2:30 PM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
The objective of the research was to study how the size of the spherical particles and the wavelength of the incident electromagnetic waves affect the intensity of the scattered electromagnetic waves. We began the calculation by solving the Helmholtz equation to obtain the scalar wave equation which led to the scattered wave by the spheres. In the limit of far-field region, the radial...
Mr
Jakkree Boonlakhorn
(Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
5/20/15, 2:45 PM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
In this research work, the giant dielectric response in Ca${}_{1-3x/2}$Yb${}_x$Cu${}_3$Ti${}_4$O${}_{12}$ ($x$ = 0, 0.05, 0.15) ceramics prepared by a modified sol-gel method and sintered at 1100 ${}^{\circ}$C for 6 and 12 h were investigated as functions of temperature and frequency. A single phase of CaCu${}_3$Ti${}_4$O${}_{12}$ was obtained in all ceramic samples. Grain growth of...
Dr
Ratchanok Somphonsane
(King Mongkut' s Institute of technology Ladkrabang)
5/20/15, 3:00 PM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
The issue of contact resistance between graphene and metal contacts is crucial in the development of high-speed graphene devices. However, fabrication-related contamination severely affects the contact resistance in graphene and hence an effective post-fabrication method is needed to resolve this problem. Current-induced cleaning has previously been used successfully to clean the surface of...
Mr
Chavalit Suksri
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
5/20/15, 3:15 PM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
Sodium niobate (NaNbO${}_3$;NN) system is a series of alkaline niobate-based ceramics, which is lead-free antiferroelectric material over a wide temperature range of -100 to +360$^{\circ}$C that shows many phase transitions [1]. However, the pure crystallized NaNbO$_3$ ceramic was obtained at high calcination temperatures and showed poor homogeneity with large particle size[2]. In this work,...
Ms
Manlika Kamnoy
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
5/21/15, 8:00 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
In this work, barium titanate; BaTiO${}_3$ (BT) powder was successfully synthesized by the molten-salt method. The molten-salt method is a simple technique for preparation of fine powder also can control the shapes and sizes in the order of nanometers. The metal oxides of BaCO${}_3$ and TiO${}_2$ were mixed and ball-milled. After that, BT powder were mixed with KCl : NaCl salt and then washed...
Mr
Nattapon Kasangam
(Department of Physics, Faculty of Science, Khonkaen University, Khonkaen, THAILAND 40002)
5/21/15, 8:15 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
In this project, carbon encapsulated Fe${}_3$O${}_4$ for supercapacitors electrode was synthesized using Fe${}_3$(No${}_3$)${}_3$ 9H${}_2$O and C${}_6$H${}_1{}_2$O${}_6$ as precursors and NaCl as supporting material. The mixture was annealed at 700 ${}^{\circ}$C, 720 ${}^{\circ}$C, 750 ${}^{\circ}$C and 770 ${}^{\circ}$C in argon atmosphere for 2 hours and heated at 250 ${}^{\circ}$C in air...
Mr
Aram Boonti
(Department of Physics, Faculty of Science,Chiang Mai University, Chiang Mai, THAILAND 50200)
5/21/15, 8:30 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
It has been shown that semiconducting materials with particle size comparable to exciton Bohr radius, called “quantum dot,” exhibit distinct physical property referring to their bulk. This leads to various applications in computing, biology, solar cell, light emitting, and photodetector. In this work, we synthesized quantum dots of copper telluride on films of zinc oxide using successive ionic...
Ms
Tipnirin Vajanarat
(Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, THAILAND 10330)
5/21/15, 8:45 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
Iron boride nanoparticles are one of soft ferromagnetic materials which also contain boron. These properties combined the possibility of magnetically targeting the nanoparticles, use their hysteresis loop to cause thermal damage of tissue, as well as provide boron neutron activation medicine in cancer therapy applications. Unfortunately, iron boride may be easily oxidized under oxygen rich...
Pattana Suwanyangyaun
(Nanoscience and Technology, Graduate School, Chulalongkorn University, Bangkok, THAILAND 10330)
5/21/15, 9:00 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
It is known that the cubic GaN (c-GaN) structure using epitaxial lateral overgrowth (ELO) could be controlled by mask fill factor (ratio of the open width to the pattern period), mask direction, and growth temperature. Particularly, ELO GaN on the [110] oriented stripe-patterned GaAs (001) exhibits hexagonal phase structure. On the other hand, in this work, we have proposed the use of the...
Mr
Phongbandhu Sritonwong
(Nanoscience and Technology, Graduate School, Chulalongkorn University, Bangkok, THAILAND 10330)
5/21/15, 9:15 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
Effects of rapid thermal annealing on the structural properties of InGaPN layers grown on GaAs (001) substrates by metal organics vapor phase epitaxy (MOVPE) have comprehensively investigated by using high resolution X-ray diffraction (HRXRD) and Raman spectroscopy, scanning electron microscopy (SEM) and atomic force microscopy (AFM). To obtain the lattice-match InGaPN on GaAs, flow rates of...
Sujinda Chaiyachad
(Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
5/21/15, 9:30 AM
Material Physics, Nanoscale Physics and Nanotechnology
Oral presentation
In this project, graphite encapsulated magnetite nanoparticle in carbon matrix was synthesized using a chemical vapor deposition (CVD) and used as a counter electrode of dye-sensitized solar cells (DSSCs). The CVD reaction employed iron(III)nitrate nanohydrate and glucose as precursors, NaCl as a supporting material and methane as a carbon source. The reaction temperature was varied at 700,...
