Keynote Speakers of ICMSE2017

Abstract

Keynote Speaker IFlexible piezoresistive material composed of conductive fillers and polymerProf. Luheng WangProfessor, doctoral supervisor, Shenghua Scholar Distinguished Professor, Central South University, ChinaBiography:Luheng Wang received the Ph.D. degree from the Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, China. He is a professor and doctoral supervisor with the School of Information Science and Engineering, Central South University, Changsha, China. He is currently the Shenghua scholar distinguished professor, and the leader of the CSU flexible sensor lab. His current research interest is to study the key mechanical/electrical properties and mechanisms for the novel flexible sensitive materials which possess multi-sensing-functions (e.g. pressure sensitive function, temperature sensitive function, magnetic sensitive function, and gas sensitive function, etc.), and to develop the multi-functional flexible sensor system based on the aforementioned sensitive materials.Research interests:Novel flexible sensitive materials, pressure sensitive function, temperature sensitive function, magnetic sensitive function, and gas sensitive function.:The composite composed of the conductive fillers and the polymer, which possesses not only the flexibility but also the piezoresistivity, can be used to develop the flexible pressure sensor. The progress in the research on the piezoresistivity of the composite is reported. The existing theories to explain the piezoresistive phenomena of the composite are summarized, including the “conductive filler gap theory”, the “conducting path theory”, the “conductive phase content theory”, and the “effective conductive path theory”. Furthermore, the limitations and the advantages of the aforementioned theories are compared and analyzed. Finally, the applications of the composite in the development of the flexible pressure sensor are presented.Keynote Speaker ⅡEmergence of topological and topological crystalline phases in T1BiS2 and T1SbS2Dr. Udo Erich Schwingenschl¨oglDoctor, King Abdullah University Of Science and Technology (KAUST), GermanyBiography:Dr. Udo Erich Schwingenschl¨ogl was a scientific employee in university of Augsburg, Germany from 07/2001–09/2004. From 09/2004–02/2008, he was a Secondary School Teacher in State of Bavaria, Germany. And from 03/2008–08/2008 he worked as a visiting Professor in University of Bras´ılia (ICCMP), Brazil. And during 09/2008– 10/2011, he was an assistant Professor in KAUST, Saudi Arabia. While during 09/2009–11/2012, he was the Program Chair “Materials Science & Engineering” of KAUST, Saudi Arabia. During 11/2011–06/2014, he was the Associate Professor in KAUST, Saudi Arabia, again. During 12/2012–06/2015, he became the Associate Dean “Physical Science & Engineering” in KAUST, Saudi Arabia. And until now, he was the professor of KAUST, Saudi Arabia.Research interests:Computational Physics and Materials Science, New Topological Materials:Using first-principles calculations, we investigate the band structure evolution and topological phase transitions in T1BiS2 and T1SbS2 under hydrostatic pressure as well as uniaxial and biaxial strain. The phase transitions are identified by parity analysis and by calculating the surface states. Zero, one, and four Dirac cones are found for the (111) surfaces of both T1BiS2 and T1SbS2 when the pressure grows, which confirm trivial-nontrivial-trivial phase transitions. The Dirac cones at the M points are anisotropic with large out-of-plane component. T1BiS2 shows normal, topological, and topological crystalline insulator phases under hydrostatic pressure, thus being the first compound to exhibit a phase transition from a topological to a topological crystalline insulator.