International Soft Matter and Nanomaterials Seminar Series

国际软物质及纳米材料系列讲座

报告题目：Self-consistent field theory of wormlike chains and its applications in polymer physics

报告人：Jeff Chen(陈征宇)教授（加拿大滑铁卢大学University of Waterloo, Canada）

地点：校行政楼一楼报告厅

时间：2014年12月18日（周四）上午10点半

讲座摘要：

In  recent years, a whole body of knowledge has been built on the  structural and conformational properties of polymers, based on the  Gaussian description of polymer statistics. Whether we are dealing with a  single polymer or spatially inhomogeneous polymer systems, the solution  of the self-consistent field theory has been one of the central focuses  of theoretical studies. A wormlike-chain modelis  more suitable for dealing with semiflexible polymers; a self-consistent  field theory can be built for systems where both spatial inhomogeneity  and orientational ordering need simultaneously considered.

This  talk, we review the progress in solving the self-consistent field  theory of wormlike chains for various physical problems and specifically  discuss two recent examples of the applications of the theory: (a) the  influence of chain rigidity on the phase diagram of AB diblock  copolymers; (b) liquid-crystal defect structures in confined geometry.  As well, we address the question that under what physical conditions,  the self-consistent field theory of wormlike chains recovers the theory  of Gaussian chains.

陈征宇教授1982年毕业于复旦大学物理系，同年经CUSPEA计划赴美。1988年获马里兰大学物理学博士学位。在加拿大多伦多大学进行两年博士后研究以后，1990加入加拿大施乐研究中心。1992年起在加拿大滑铁卢大学任教。现为该大学物理及天文系教授兼系主任。

陈教授的研究方向包括凝聚态物理、高分子物理、生物物理和计算物理等。研究手段包括建立适合理论研究的粗粒化模型、进行统计物理解析计算、和应用现代大型高性能计算簇（High Performance Computing Cluster）进行数字模拟计算等.

主要学术贡献有：重整化群理论在流体相变点附近和工程界适用的状态方程的结合； A2BX4固体系列相变的统一理论；树枝状高分子动力学；高分子螺旋结构形成机理；高分子链形成的液晶相变、液晶表面多阶梯相变与液晶介面性质的理论探索；wormlike高分子模型在AB diblock copolymers相变的应用；wormlike高分子模型在生物系统中的理论应用；金属纳米cluster结构预测；高分子(或是纳米球)与生物膜互相作用而引起的结构相变的理论预测。