报告人：Prof. An-Chang Shi (史安昌), McMaster University, Canada
时间：2018年12月10日（周一），16:00
地点：广州大学计算机实验楼709会议室
报告摘要：Frustration is a central concept to understand various emergent phenomena in condensed matter. In particular, frustration plays a pivot role in the self-assembly of block copolymers. At the molecular scale, frustration occurs because the different blocks tend to phase separate whereas the chain connectivity prevents a macroscopic phase separation. At the mesoscopic scale, frustration occurs due to the competition between the tendency for the polymeric domains to maintain a uniform shape and the need to fill the space. Alleviating these frustrations provides the driving force to form complex ordered phases. Furthermore, frustration due to the topology of multiblock copolymers could lead to the formation of hierarchically structured morphologies. Recent studies on the formation of complex ordered phases from block copolymers have provided new insight into the origin of various frustrations in block copolymer assemblies. Furthermore, the studies have demonstrated that designed block copolymers, either in the form of multiblock copolymers with different architectures or block copolymer blends, could be utilized to tailor frustrations occurring in block copolymer systems.
报告人简介：Prof. An-Chang Shi received a Ph.D. in physics from the University of Illinois at Urbana-Champaign in 1988. He then went to McMaster University in Canada as a Postdoctoral Fellow/Research Associate. In 1992 he became a Member of Research Stuff at Xerox Research Centre of Canada. In 1999 he joined the Department of Physics & Astronomy at McMaster University as an Associate Professor, and promoted to Professor in 2004. Prof. Shi is a world renowned soft matter theorist. His research interests include theory of phases and phase transition of soft matter, self-assembly and morphology of block copolymers, statistical mechanics of conformation of macromolecules, and theory of bilayer membranes. He has published over 200 papers (~7000 citations) in peer-reviewed journals including PNAS, PRL, JACS, and given more than 50 invited talks in international conferences. He was elected as a Fellow of the American Physics Society in 2010.
