Surface Confinement as a Strategy to Control Phase Transition: from Polymer Micelles to Gas Nanobubbles
讲座名称：
Surface Confinement as a Strategy to Control Phase Transition: from Polymer Micelles to Gas Nanobubbles
讲座时间：
2016-04-14
讲座人：
陈前进
形式：
校区：
兴庆校区
实践学分：
讲座内容：
报告题目： Surface Confinement as a Strategy to Control Phase Transition: from Polymer Micelles to Gas Nanobubbles
报告时间：2016年4月14日（星期四）上午10:00-11:00
报告地点：化学楼207室
报告人：美国犹他大学化学系陈前进博士
报告内容简介：In a physically confined environment, structure frustration, confinement- induced entropy loss, and surface interactions can strongly influence the molecular organization and consequently may change the phase transition behavior. In this talk, I am going to give two examples of such confinement induced phase transition. The first part of my talk will discuss an interesting spherical-to-cylindrical transition of block copolymer micelles induced by the nanopore confinement. Long polymeric nanowires with several micrometer can be obtained simply from extruding spherical micelles through nanopores. Some basic physical understanding as well as applications of such a confinement induced transition will be covered. The second part of my talk will focus on studies of single gas nanobubble, which is confined at nanosized surface. By minimizing the electrode size down to nm and rapid electrochemical generation of gas molecules at the electrode surface, we are able to electrochemically nucleate a single gas nanobubble. Based on such single nanobubble investigation, the physics and chemistry of bubble are studied in a very different way with many valuable insights into phase nucleation reaction.
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