School Seminars and Colloquia

Random copolymers subject to a force

Statistical Mechanics

by Prof. Stu G. Whittington


Institution: Dept. of Chemistry, University of Toronto
Date: Thu 25th November 2004
Time: 3:15 PM
Location: Room 213, Richard Berry Building, The University of Melbourne

Abstract: Random copolymers can adsorb at a surface and localize at an interface between two immiscible liquids. For some directed walk models we investigate the temperature dependence of the critical force required
(a) to cause desorption (at an impenetrable surface), (b) to pull a polymer from a favourable liquid phase to a less favourable liquid phase and (c) to delocalize a polymer at an interface. In some circumstances the
temperature dependence of the critical force can be found exactly for these models, while in other cases we use the Morita appromimation. We show that the Morita approximation gives a bound on the required force and, in some cases, gives the exact force.

For More Information: Iwan Jensen tel. 8344-5214 email: I.Jensen@ms.unimelb.edu.au