Prof. Akira Toriumi, IEEE Fellow, The University of Tokyo, Japan
Speech Title: Toward High Performance Ge MOSFETs
Abstract: It is said that Si CMOS technology is now facing intrinsic challenges in terms of the size scaling limit as well as intrinsic material properties for enhancing device performance. We have studied Ge in place of Si in order to enhance CMOS performance by utilizing better material properties of Ge. In particular, we have paid attention to higher carrier mobility of electron as well as hole in the bulk Ge. However, very poor electron mobility has unfortunately been reported in MOSFETs. The question is whether this is intrinsically true or not. Our conclusion is that we can achieve high performance Ge MOSFETs by correctly bringing the best out of high potential of Ge specific properties. Ge looks like Si, but is different from Si.
Biography: Akira Toriumi received the B.S. degree in physics, the M.S. and Ph.D. degrees in applied physics from The University of Tokyo in Japan in 1978, 1980 and 1983, respectively. Then, he joined R&D Center of Toshiba Corporation in Japan, in which he had been engaged in device physics and technology in CMOS miniaturization. He was with Massachusetts Institute of Technology, USA (1988–1990) as a visiting scientist on leave from Toshiba. In May 2000, he moved to Department of Materials Engineering of The University of Tokyo. He had also served as a high-k gate stack group leader in MIRAI Project (a national project for advanced CMOS in Japan) from 2001 to 2007. He retired in March 2019, and he is now an emeritus professor in The University of Tokyo.
Through his professional carrier, his research interests have been on device physics and materials science with regard to semiconductor devices. Particularly, he has investigated gate dielectrics, functional oxides, electron transport and processing science in Si and Ge CMOS, and low-dimensional materials and devices. He has authored and co-authored more than 600 scientific journal papers and conference proceedings, and several book chapters. He received several awards such as IEEE International Reliability Physics Symposium (IRPS), Best Paper Award (1997), Solid-State Device and Materials (SSDM), Best Paper Award (2000 & 2003), IEEE EDS Paul Rappaport Award (2004), SSDM Award (2014), IEEE Cledo Brunetti Award (2016) and JSAP (The Japan Society of Applied Physics) Outstanding Achievement Award (2017). He served as several international conference chairs and committees such as Executive Committee in VLSI Symposium (2008-2017), Program Chair (2005) and Organizing Chair (2018) in International SSDM, General Chair in Si-Nanoelectronics Workshop (IEEE/JSAP) (1999), Executive Committee (2004-2006) and Vice President (2012-2013) in JSAP, Vice Chair (2010-2011) and Chapter Chair (2012-2013) in IEEE EDS (Electron Device Society) Japan.
Prof. Hua Zhang, City University of Hong Kong, Hong Kong
Speech Title: Phase Engineering of Nanomaterials (PEN)
Abstract: In this talk, I will summarize the recent researches on phase engineering of nanomaterials (PEN) in my group. In particular, we focus on the rational design and synthesis of novel nanomaterials with unconventional phases for various promising applications. For example, by using wet-chemical methods, for the first time, we have successfully prepared novel Au nanostructures (e.g., the hexagonal-close packed (hcp) Au nanosheets, 4H hexagonal Au nanoribbons, and crystal-phase heterostructured 4H/fcc and fcc/2H/fcc Au nanorods), epitaxially grown metal nanostructures with unconventional crystal phases on the aforementioned Au nanostructures, and amorphous/crystalline hetero-phase Pd and PdCu nanosheets. In addition, by using gas-solid reactions, metastable 1T'-phase group VI transition metal dichalcogenides (TMDs), e.g., WS2, WSe2, MoS2, MoSe2, WS2xSe2(1-x) and MoS2xSe2(1-x), have been prepared. Moreover, the phase transformation of TMDs during our developed electrochemical Li-intercalation process has also be observed. Impressively, the lithiation-induced amorphization of Pd3P2S8 has been achieved. Currently, my group focuses on the investigation of phase-dependent physicochemical properties and applications in catalysis, (opto-)electronic devices, clean energy, chemical and biosensing, surface enhanced Raman scattering, waveguide, photothermal therapy, etc., which we believe is quite unique and very important not only in fundamental studies, but also in future practical applications. Importantly, the concepts of phase engineering of nanomaterials (PEN), crystal-phase heterostructures, and hetero-phase nanomaterials are proposed.
Biography: Professor ZHANG Hua received his bachelor and master degrees at Nanjing University, China in 1992 and 1995, respectively, and completed his doctoral degree under Prof. LIU Zhongfan at Peking University, China in July 1998. After spending a few years as research associate/postdoctoral fellow in Katholieke Universiteit Leuven (KULeuven), Belgium with Prof. Frans C. De Schryver and Northwestern University, USA with Prof. Chad A. Mirkin, he started to work at NanoInk Inc. (USA) as a Research Scientist/Chemist in August 2003. Afterwards, he worked as a Senior Research Scientist at Institute of Bioengineering and Nanotechnology in Singapore in November 2005. Then he joined the School of Materials Science and Engineering in Nanyang Technological University (NTU) as an Assistant Professor in July 2006 and was promoted to Full Professor in September 2013.
Prof. ZHANG has filed 74 patent applications (including 8 granted US patents), and published 5 invited book chapters and over 460 papers, including Science, Nat. Chem., Nat. Catal., Nat. Rev. Mater., Nat. Commun., Sci. Adv., Nat. Protocols, Chem. Rev., Chem. Soc. Rev., Acc. Chem. Res., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater., etc., with total citation times of over 57,000 and H-index of 118 (Web of Science). He is one of the Chairmen of the Editorial Board of ChemNanoMat (2015-), sits on the Advisory Board of Chemical Society Reviews (2012-), Materials Chemistry Frontiers (2016-), Matter (2019-), Nanoscale (2012-), Nanoscale Horizons (2015-), and NPG Asia Materials (2018-); the Editorial Advisory Board of ACS Nano (2014-), Advanced Functional Materials (2018-), Chemistry of Materials (2014-), ACS Applied Materials & Interfaces (2014-), Small (2012-) and Nanofabrication (Versita, 2012-); the Editorial Board of ACS Omega (2016-), Applied Materials Today (2015-), Carbon (2013-), CHEM (2016-), Chinese Science Bulletin (2014-), Energy Storage Materials (2015-), EnergyChem (2018-), Graphene Technology (2016-), Materials Today Energy (2016-), npj 2D Materials and Applications (2016-), Science China Materials (2014-), and NANO (2007-); the International Advisory Board of Chemistry – An Asian Journal (2018-); the International Advisory Panel of Materials Research Express (2014-2016); the International Editorial Board of ChemPlusChem (2012-2015); and the Scientific Advisory Board of Small Methods (2017-). He is an Associate Editor of International Journal of Nanoscience (2007-) and was one of the members of the Advisory Committee of IOP Asia-Pacific (2010-2013). In 2015, he was elected as an Academician of the Asia Pacific Academy of Materials (APAM). In Nov. 2014, he was elected as a Fellow of the Royal Society of Chemistry (FRSC). Moreover, he received the 2015 ACS Nano Lectureship Award (2015), the World Cultural Council (WCC) Special Recognition Award (2013), SMALL Young Innovator Award (2012) and Nanyang Award for Research Excellence (2011). In 2016, he was listed in the top 300 most cited researchers in the field of materials science and engineering by Elsevier Scopus. In 2017, he was listed in the "Highly Cited Researchers 2017" in Chemistry and Materials Science. In 2016, he was listed in the "Highly Cited Researchers 2016" in Chemistry and Materials Science. In 2015, he was listed in the "Highly Cited Researchers 2015" in Chemistry and Materials Science, and also listed as one of 19 "Hottest Researchers of Today" in the world (please see the World's Most Influential Scientific Minds 2015 by Thomson Reuters, 2015). In 2014, he was listed in the "Highly Cited Researchers 2014" in Materials Science, and also listed as one of 17 "Hottest Researchers of Today" and No. 1 in Materials and More in the world (please see the World's Most Influential Scientific Minds 2014 by Thomson Reuters, 2014).
Prof. Hisaki Watari, Tokyo Denki University, Japan
Speech Title: Change of Automotive Industry and Future Possibilities of Magnesium Alloys in Manufacturing Industries
Abstract: In recent years, the movement for banning the sale of gasoline cars and diesel vehicles, especially in Europe, and allowing only electric passenger cars has been accelerated. For examples, Germany’s federal council, the Bundesrat, has passed a resolution calling for a ban on combustion engine cars by 2030. If the ban were to go through, German citizens would only be permitted to purchase electric or hydrogen-fueled cars. In Norway, until 2025 there is a movement for legislation prohibiting the registration of new gasoline passenger cars and diesel cars. Beginning in2025 in the Netherlands, a bill prohibiting the sale of new cars gasoline and diesel vehicles was submitted to Congress. Under the circumstances, the demand for light-weight products for automotive industries has been increased due to global trends in environmental preservation. Although demands for magnesium has risen dramatically, production of magnesium alloy sheet still remains at a very low level.
Recently, it seems that the future structural design of new vehicles lightweight strategy forced to be to be changed due to rapid market change in automotive industry, for examples, Tesla just became the world’s most valuable automaker, after the electric vehicle company’s market value surpassed Toyota’s for the first time. It means new value of cars have probably changed although young generation in Japan never would like to buy cars, in my opinion.
The prediction of the future situation in the world will be difficult however, the two key words, such as environmental preservation and safety system of cars will be still important point in manufacturing even though the market of automotive industries are changed.
In such circumstance, the future role of magnesium alloys will be discussed, especially one of the future structural member of the cars. The direct hot forging of magnesium alloys which manufactured by one of the rapid cooling will be proposed for practcial use of magnesium alloys for car components. Also, bonding technology which will be able to extend demand of lightweight metals such as aluminum and magnesium alloys will be proposed for manufacturing a novel light weight material, bonded plastics/magnesium alloys materials.
Biography: Hisaki Watari has received his PhD in Mechanical System Engineering, from Gunma University, Japan in 2006. He has been researching into properties of magnesium alloy by rapid cooling by using twin roll casting in these fifteen years in Gunma University and Oyama National Colleague of Technology in Japan, in UMIST in the UK. He is now the chair of the Japan Association of Aluminum Forging Technology. He has published more than 130 papers in journals and conducting works relating metal forming of light metals, such as aluminum and magnesium alloys.