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学术报告——“Light Induced Interactions of Multilayer Films with Inorganic Substrates”
发布日期:2017-5-11 17:28:11 阅读次数:377

 

国家重点实验室学术讲座/SKL-AMM Seminar

题目/TitleLight Induced Interactions of Multilayer Films with Inorganic Substrates and Nanoparticles

报告人/SpeakerProf. Helmuth Möhwald

报告人工作单位: Max Planck Institute of Colloids and Interfaces, Germany

日期/Date2017517(星期三)May. 17 (Wednesday), 2017

时间/Time上午9:30-11:00/ 9:30-11:00 AM

联系人/Contact李立东教授,lidong@mater.ustb.edu.cn

报告地点/Location北京科技大学主楼 353, 353 Main Building, USTB

讲座受“先进金属结构和功能材料科学与技术创新引智基地”(国家“111”计划)项目支持

报告摘要/Abstract

The use of light as an external stimulus to modulate polymer systems has great potential in biosciences, medicine, and tissue engineering, owing to the possibility to irradiate micron-sized areas with fast on/off switching rates. Light-actuating composite layer-by-layer polyelectrolyte assemblies in most cases contain metal nanoparticles, which couple light and temperature providing local heating and decomposition in layer-by-layer assemblies. We introduce a simple concept of a light induced pH change, followed by high amplitude manipulation of the mechanical properties of an adjacent polymer film. Irradiation of a titania surface is known to cause water splitting, and this can be used to reduce the environmental pH to pH 4. The mechanical modulus of an adjacent pH sensitive polymer film can thus be changed by more than an order of magnitude. The changes can be localized, maintained for hours and repeated without material destruction.

作者简介/Speaker’s short biography

Helmuth Möhwald教授,任马普学会胶体与界面研究所所长1971年毕业于德国哥廷根大学,获物理学学士学位,1974年毕业于德国马克斯普朗克生物物理化学研究所,获物理学博士学位。曾担任过欧洲胶体与界面学会主席德国胶体协会主席以及多个国际著名期刊的主编和编委,现任美国化学会ACS Nano杂志副主编。Helmuth Möhwald教授获得众多奖章,其中包括德国物理学会物理奖(1979年),德国胶体学会Raphael-Eduard-Liesegang 奖章(1998年),欧洲胶体与界面学会Overbeek奖章(2007年),德国胶体学会Wolfgang Ostwald奖章(2009年)等。Helmuth Möhwald教授主要从事分子界面和膜、胶囊与控制释放、膜生物物理学、超分子界面动力学等科学领域的研究。目前发表论文超过1100篇,SCI他引超过50000次,H因子为106,是世界上他引频率最高的科学家之一。

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