Title：Optical Reflectometry for Studying Surfactant and Polymer Adsorption and Swelling at Interfaces
Time：3:00 pm, Tuesday ,April 26,2011
Speaker：Dr. Vincent Craig ,Associate Professor（School of Physics and Engineering，Australian National University）
Location：205room,Blg14, SCUT North Campus
Sponser: School of Materials Science and Engineering

Abstract：
Optical reflectometry is a form of ellipsometry which is very well suited to following the kinetics of adsorption. It is usually set-up such that the signal measured is directly proportional to the adsorbed mass of material however it can also be used to follow the selling and collapse of adsorbed stimulus responsive polymers. The speaker will describe the technique of optical reflectometry and how they have used it to follow the swelling and collapse kinetics of a pH sensitive microgel.

Brief introduction to Dr. Vincent Craig：
Vincent Craig is Head of the Department of Applied Mathematics at the Australian National University in the Research School of Physics and Engineering. He completed both his B.Sc. (Honours in Chemistry, 1993) and Ph.D. degrees (Reasearch School of Physics, 1997) at the ANU before postdoctoral positions at UC Davis, California and the University of Newcastle, NSW. He was awarded an ARC Postdoctoral Fellowship in 1998 and an ARC Research Fellowship in 2001. He is currently the recipient of an ARC Future Fellowship. His research interests include the direct measurement of surface forces both quasi-static and dynamic, interfacial adsorption of surfactants and polymers, specific ion effects and bubble coalescence in electrolyte solutions. He has published 70 fully referees journal papers which have been cited ~2100 times.