Prof. UMEMURA Kazuo
Tokyo University of Science, Japan
Biography: Dr. Kazuo Umemura is a full professor of Tokyo University of Science. His specialty is biophysics, especially, nanobioscience and nanobiotechnology. One of his recent interests is nanoscopic research of hybrids of biomolecules and carbon nanotubes (CNTs). Unique structures and physical/chemical properties of the hybrids are promising in biological applications such as nanobiosensors and drug delivery.
Dr. Umemura received his B.S. degree in Physics from Nagoya University. His M.S. and Ph.D. degrees were given from Tokyo Institute of Technology. After working at several institutes/universities as a researcher in Japan and in China, he became a professor of Tokyo University of Science. Kagurazaka campus of Tokyo University of Science is located at the center of Tokyo, so five subway/railway lines reach in front of the campus.
Title of Speech: Optical and mechanical responses of DNA wrapped carbon nanotubes
Abstract: Preparation of DNA wrapped single-walled carbon nanotubes (DNA-SWNT hybrids) is one of the key techniques of biological application of SWNTs. ‘Wrapping’ of SWNT surfaces with water soluble molecules allows solubilizing SWNTs in aqueous solutions. Various researchers wrapped SWNT surfaces with various organic molecules such as surfactants, proteins, DNA, and polymers. Among the organic molecules which can wrap SWNTs, DNA is advantageous because DNA-SWNT hybrids are stable. Furthermore, DNA sequence has correlation with SWNT chirality.
We have studied optical and mechanical properties of DNA-SWNT hybrids by near-infrared (NIR) spectroscopy and atomic force microscopy. NIR absorbance and photoluminescence spectra of DNA-SWNT hybrids dramatically change due to pH of the solution and addition of catechin or other chemicals. The optical response of DNA-SWNTs is sensitive, so that it indicates potential applications of nanobiosensors using SWNTs. Atomic force microscopy showed flexible structures of DNA molecules on SWNT surfaces, especially in an aqueous solution. Our studies revealed fundamental information about structures and physicochemical properties of DNA-SWNT hybrids.
Prof. Kenji OGINO
Tokyo University of Agriculture and Technology, Japan
Biography:Dr. Kenji Ogino is a full professor of Tokyo University of Agriculture and Technology. His research has concentrated on synthesis of semiconducting polymers and applications to photorefractive, electroluminescent, and photovoltaic devices. Especially he is interested in block copolymers, which can form microphase separated nanostructures in thin films.
Dr. Ogino received his B.S. degree from Department of Reaction Chemistry, the University of Tokyo in 1986. His Ph.D. degree was given from the University of Tokyo in 1995. He started his carrier at Tokyo University of Agriculture and Technology as a research associate in 1986, and was appointed to current position in 2005. In 1997, he spent one year at C. K. Ober research group in Cornell University as a visiting scientist. He is also a vice-president of the Society of Fiber Science and Technology, Japan.
Title of Speech: Characterization of poly(3-hexylthiophene) based block copolymers and their applications to electronic devices
Abstract: Several block copolymers based on poly(3-hexylthiophene) (P3HT) and inert second block. For example, a P3HT-block-polystyrene thin films exhibited much higher hole mobilities compared with P3HT precursors. Rigid amorphous domains detected by a DSC analysis play an important role for hole transporting process. P3HT-block-poly(dimethylsiloxane) (P3HT-b-PDMS) and P3HT-b-PDMS with perylene diimide junction of P3HT and PDMS (P3HT-PDI-PDMS) were synthesized. The blend films of P3HT or their block copolymers and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as electron-transport materials were evaluated as an active layer in organic thin-film solar cells. The device using P3HT-b-PDMS with 9.6% composition of PDMS showed efficiency of 3.24%, which was higher than that observed in the P3HT-based device.
Prof. Shih-Chieh Lin
National Tsing-Hua University, Taiwan
Biography: Dr. Shih-Chieh Lin is Full Professor of the Department of Power Mechanical Engineering, and Director of the Scientific Instrument Center, National Tsing Hua University, Taiwan. He received his Ph.D. in Mechanical Engineering from University of Illinois at Urbana-Champaign, US, in Aug 1989.
Dr. Lin's research interests include Monitoring and Control of Manufacturing Process such as Drilling, Face Milling, and Turing, Modeling and Optimization of Manufacturing Process, such as Face Milling, Turning, Drilling, and Chemical Mechanical Polishing, Machine Vision, Methodology of X-ray Computer Tomography, Inspection and Measurement of Transparent objects, 3-D surface metrology, Analysis and Design of Hydrostatic Devices. Dr. Lin has published more than 200 journal and conference papers and currently cooperated with several companies.
Title of Speech: Machining Process Monitoring and Control
Abstract: In machining operations, unexpected or undesired phenomenon such as chatter, tool breakage might appear. The occurrence of these undesired phenomenon will force the process to be stop. Certainly, extra cost and processing time occurs. Lately, Intelligent Manufacturing becomes a hot topic. It grabs a lot of attention especially when Industry 4.0 was announced in Germany. However, come to the most fundamental part, the techniques for process monitoring is still one of the most important issues. In this presentation, I would like to share my viewpoint about the technology available or those might be needed for the development of intelligent manufacturing, and also some of my work related in machining process monitoring and ontrol.
Prof. Dong Bok Lee
Sungkyunkwan University, South Korea
Biography: Prof. Dong Bok Lee gained B.S. in 1977 (Seoul National University, Dept. of Mater. Sci. & Eng., Korea), M.S. in 1979 (KAIST, Dept. of Mater. Sci. & Eng., Korea), and Ph.D. (Penn State Univ., Dept. of Mater. Sci. & Eng., USA). He is a prof. of School of Advanced Materials Science & Engineering, Sungkyunkwan University, Korea from 1990. He has served as a vice president of Korea Institute of Surface Engineering, and as a board member of Corrosion Science Society of Korea. He was awarded as ‘Outstanding Paper 2014’ by the Korean Federation of Science and Technology Societies. He is actively engaging in the R&D and scientific works about surface engineering. He has published more than 250 SCI papers.
Title of Speech: High-temperature Corrosion of Hot-dip Aluminized Fe-Cr steels
Abstract: Hot-dip aluminizing is a simple, cost-effective diffusion coating technique that can coat aluminum on diverse substrates with complicated shapes. It is carried out by dipping the substrate into molten Al bath for a certain period, and pulling out of the bath into the air. The employed substrates were mostly carbon steels, low alloyed steels, Fe-(Si, Cr) alloys. During hot-dipping, inter-diffusion between the steel substrate and molten Al occurs to produces the Al-rich topcoat, the outer FeAl3 layer, and the inner Fe2Al5 layer. The property of these aluminized layers depends on various hot-dipping parameters such as bath composition, time, temperature, and substrate. In this study, hot-dipping was performed on Fe-Cr alloys, and the corrosion behavior of aluminized Fe-Cr alloys at high temperatures was studied. The corrosion tests were performed in air, SO2-containing atmospheres, and H2S-containing atmospheres. Hot-dip aluminizing was found as an effective coating technique, which could form protective α-Al2O3 scales not only in air but also in (SO2, H2S)-containing aggressive corrosive environments due to high thermodynamic stability of Al2O3.
ACKNOWLEDGEMENT. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1D1A1B03028792).
Dr. Sujun Guan
Tokyo University of Science, Japan
Biography: Sujun Guan is an assistant professor in the Department of Physics, Tokyo University of Science, Japan. He received his bachelor’s degree from School of Materials Science and Engineering, Yancheng Institute of Technology, and master’s degree from School of Materials Science and Engineering, Zhejiang University of Technology, China, and his Ph. D degree from Graduate School of Mechanical Engineering, Chiba University, Japan in March 2017.
His current research interests include the preparation, characterization and applications of semiconductors and nanomaterials for photocatalytic water splitting, transparent solar cell, photoluminescence, magnetic properties.
Title of Speech: Enhancement of photochemical water splitting on transparent ZnO@GZO films via charge-transfer effect
Abstract: The transparent conducting oxides (TCOs) have gained much attention owing to their potential applications in several optoelectronic devices such as light emitting diodes, solar cells, thin film transistors for the flat panel displays, and optical detectors as well as flexible displays. However, ZnO also suffers from the drawback that limit efficient water splitting, such as the low photo-corrosion resistant, wide band gap energy of 3.37 eV and rapid recombination rate due to the formation of unwanted species that act as trapping sites. To improve water splitting performance, suppressing the recombination is the most commonly used strategy by charge transfer via coupling with that of better conductivity.
With the purpose of enhancing the photochemical water splitting performance, GZO film has been used to increase the charge transfer of ZnO film by RF magnetron sputtering. The characterization of ZnO film and the ZnO@GZO films was carried out by X-ray diffraction, DRUV-vis spectra, X-ray photoelectron spectroscopy, atomic force microscope, photoluminescence spectroscopy and photochemical water splitting. Photoluminescence spectra reveal that the recombination of electron and hole decreased via the increased charge transfer by GZO film. Compared with that of ZnO film, the ZnO@GZO films could efficiently enhance the photochemical water splitting performance via the increased charge transfer by GZO film.