Ordered phases of block copolymers
报告题目(Title)： Ordered phases of block copolymers
报告人(Speaker)：史安昌 教授（McMaster University）
地点(Place)：腾讯会议ID：384 572 670
时间(Time)：2021.7.5（星期一） 09：00-10：00
邀请人(Inviter)：蔡永强
报告摘要
The observation of ordered phases in hard-condensed matter systems such as metallic alloys has a long history in materials physics. In recent years, intricate periodic and aperiodic order has emerged in a host of soft matter systems including supramolecular assemblies, surfactants and block copolymers. The occurrence of complex phases in these diverse systems underscores the universality of emergent order in condensed matter. The richness of the phase behavior is exemplified by block copolymers. In particular, recent experimental and theoretical studies have revealed that non-classical ordered phases, such as the Frank-Kasper phases and quasicrystals, could emerge from block copolymers as equilibrium or metastable morphologies. We have examined the occurrence of complex spherical packing phases in block copolymer systems using the self-consistent field theory. Our study reveals that one key mechanism of forming complex spherical phases is the conformational asymmetry of the blocks. Furthermore, we have predicted that the segregation of different polymeric species in block copolymer blends provides another mechanism to stabilize spherical packing phases with very different sized-spherical domains. In my presentation, I will summarize recent theoretical and experimental progresses on this fascinating topic and discuss possible future research directions.
主讲人简介
史安昌教授1982 年本科毕业于复旦大学物理系，1988 年博士毕业于 University of Illinois at Urbana-Champaign 物理系，现为加拿大 McMaster University 物理与航空系教授，美国物理学会会士，复旦大学长江讲座教授，北京大学客座教授。史教授是世界著名的软物质理论学家，他的研究方向包括软物质相与相变理论、嵌段共聚物的自组装、高分子凝聚态、双层膜理论等。他在 PNAS、PRL、JACS、Macromolecules 等领域内一流期刊上发表了300多篇论文（约9000次引用），并在国际会议上应邀发表了50多次演讲。
