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.
Biography: Dr. Xiaohong Zhu is currently a full professor at Department of Materials Science, Sichuan University, China. Dr. Zhu received his BSc degree in Materials Physics from Sichuan University in 2000 and PhD degree in Condensed Matter Physics from the Institute of Physics, Chinese Academy of Sciences in 2006. After that, he did 3-year postdoctoral research at CNRS and CEA in France, and then joined Sichuan University as a professor in 2009. From April 2012 to April 2013, he was also a research scholar at the Department of Physics & Department of Materials Science and Engineering, University of California, Berkeley, USA. He was selected as a New Century Excellent Talent in University of China in 2009 and an Outstanding Young Scientific and Technological Leader of Sichuan Province, China in 2011. Dr. Zhu’s research interests include mainly graphene-based electrode materials and novel solid-state electrolytes for energy storage devices (supercapacitors and lithium-ion batteries), piezoelectric ceramics, as well as multifunctional oxide thin films and related electronic devices. Until now, he has authored/co-authored more than 80 SCI-indexed papers and 2 scientific books.
Biography: Prof. Jong Hak Kim received his Ph.D. degree in Chemical Engineering department of Yonsei University, South Korea in 2003. He worked as a postdoctoral researcher in the department of materials science and engineering at Massachusetts Institute of Technology (MIT) until he joined Yonsei University in 2005 as an assistant professor. He is now a full professor of Chemical and Biomolecular Engineering department in Yonsei University. His current research interests include the design and synthesis of graft copolymers and their applications to gas separation membranes and polymer electrolyte for electrochemical devices. He has a publication record of over 270 papers in refereed international journals such as Adv. Mater., Adv. Funct. Mater., ChemSusChem, ACS Appl. Mater. Interfaces, J. Membr. Sci., Chem. Eng. J. and etc. The sum of the times cited is 5785 and h-index is 42.
Biography: Dr. Shu YIN received a B. S. degree in inorganic chemical engineering from the Dalian University of Technology in 1987. He received a M. S. degree in chemical metallurgy from the Institute of Chemical Metallurgy (ICM, latterly Institute of Process and Engineering, IPE), Chinese Academy of Science in 1990, then worked as a research associate for 2 years at ICM. He came to Japan and worked as a research fellow in the Hydrothermal Chemistry Research Laboratory (Prof. N.Yamasaki’s Group), Kochi University in 1992, then became a research assistant at the Institute for Chemical Reaction Science (ICRS, Prof.T.Sato’s group), Tohoku University during 1995-1997. He received a Ph.D. degree in applied chemistry from Tohoku University (research period shortened) in 1999. He has been a research assistant at the ICRS in 1999, then a lecture and associate professor at the Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University in 2005, and then a full-time professor in 2016. He is also an affiliate professor of eight Chinese Universities / Institutes (Lanzhou University; Dalian University of Technology; Guangxi Research Institute of Chemical Industry, Huaqiao University, Taiyuan University of Technology, Sichuan University, Beijing University of Technology, University of Science and Technology Beijing / State Key Laboratory of Rare Earth Resource Utilization). He has authored more than 440 original research papers, contributed 25 book chapters/ review papers and 22 patents. His research papers were cited more than 9140 times and showed a citation h-index = 53. His research interests include morphological control of nanostructured materials, photocatalytic materials, UV-shielding materials, hydrothermal / solvothermal process, soft chemical synthesis etc.. Prof. Yin has received various awards, including “Functional Materials Scientist Award(2009)”, “Excellent Academic Photograph Award(2005)”, “The 40th Harada Award(2000)”. “The 59th Academic Award of the Society of Inorganic Materials Japan (2015)”, and “The 69th CerSJ Awards for Academic Achievements in Ceramic Science and Technology (2015)”.
Title of Speech: Synthesis of Nanostructure-Controllable Nitrides / Oxynitrides and their Novel Applications
Abstract: Nitrides and oxynitrides have attracted many researcher’s attentions, because of their novel functionalities. The physical-chemical properties of the materials greatly affecte by their morphology, particle size, specific surface area and crystalline facets etc. It is accepted that hydrothermal or solvothermal method has become a promising way for the synthesis of inorganic functional materials, because of the possibility for producing nano-size crystals with soft agglomeration, and controlling the phase composition or morphology by optimizing reaction conditions. In order to develop novel functionality of nitride materials, nanostructure control is an interesting topic. However, for normal synthesis process, it is quite difficult to prepare morphology / particle size controllable nitrides directly. In the present talk, environmental friendly low-temperature synthesis of the products with controllable particle size and morphologies will be introduced. Some novel properties such as photocatalytic activity and hydrogen gas sensing performance of the nitrides and oxynitrides will be introduced also.
In a typical synthesis process for morphological control, the precursors with various morphologies synthesized by hydrothermal process were utilized for the nitridation treatment. As an example, GaN was prepared from α–GaOOH precursors by a direct nitridation method under NH3 flow. The nitridation was carried out at various temperatures to obtain GaN with different oxygen contents, which played important role to H2 gas sensing response. Although the oxides showed very limited gas sensing property, the nitrides showed quite enhanced sensing sensitivity.The sensor devices also showed high stability and repeatable property after being exposed in H2 gas at high temperatures. Furthermore, the morphology controllable aluminum nitride such as needle-like, nest-like and plate-like AlN were also successfully synthesized by the similar manner. The plate-like morphology had the lowest shrinkage completing temperature, indicating its quite different sintering behavior compare with other morphologies. On the other hand, in order to synthesis the nitrides and oxytrides with nanoscale particle size, the addition of acetylene black during the hydrothermal process is an effective way. As an example, the Gallium oxynitride (GaON) nanoparticles could be successfully synthesized through hydrothermal treatment of an aqueous solution containing Ga(NO3)3 together with hexamethylenetetramine and acetylene black., followed by calcination and then nitridation in ammonium gas atmosphere. The presence of acetylene black in the hydrothermal treatment is an effective way for the synthesis of nanosize of particles even followed by high temperature calcination and nitridation treatment. The obtained GaON nanoparticles show a higher photocatalytic NOx decomposition activity than that of bulk GaON, because of their small particle size and high specific surface area.
Biography: Dr. S. K. Koh received his Ph.D. at Department of Mechanics & materials Science, Rutgers, the State University of New Jersey, U.S.A, in 1989, and served as Research Associate at High Pressure Materials Research Lab. At Rutgers Univ. in 1989. He worked at Ion Beam Engineering Laboratory, Kyoto Univ, Japan as a foreign Professor and Head of Lab. in 1991, and served at Korea Institute of Science and Technology (KIST) as a Principal Researcher and adjunct Professor of Yonsei Univ. and Korea Univ. in Korea until 2000. He has been worked on surface modification and thin film growth by ion beam from his Ph.D. thesis” Enhancing adhesion between Cu thin films and Polyimide by 100keV Ar+ ion irradiation” for 30 years. He has many awards” One in hundred outstanding men in Korea” in 1995, “An Award of New Scientist in Korea” in 2000, “A Best scientist in KIST”, in 2000, etc. His surface modification technology was nominated to “Best Seven technologies in Asia, Asiaweek, in 2001 and his inventions relating to surface modification technologies were broadcasted many times from Discovery News and ABC News in the U.S.A., NHK in Japan, and all Newspapers & Broadcast in Korea. He licensed and commercialized the technologies that were invented by him and his colleagues in surface modification by ion beam to more than 15 companies such as LG electronics, Samsung Electro - Mechanics, Plaworks, etc., and he managed companies” P&I Corp.” funded by KIST as a CEO from 2002- 2007 and “GL Materials Inc.” mainly focused on nano particles formation technology, namely “Nanoparticles on Powder: NPP” as a CEO from 2009- to now. The applications by the NPP technologies has been transferred to various Korean, Chinese and Japanese companies. He has 159 articles and 69 patents.