School Seminars and Colloquia

Polymer near a surface - Simulations results.

Mathematical Physics Seminar

by Jarek Krawczyk


Institution: MASCOS, The University of Melbourne
Date: Thu 10th March 2005
Time: 3:15 PM
Location: Room 213, Richard Berry Building, The University of Melbourne

Abstract: In this talk we present simulations of a surface-adsorbed polymer
subject to an elongation force. The polymer is modeled by both a self-avoiding and interacting-self-avoiding walk on a regular lattice. It is confined by an absorbing surface to a half-space with attractions for every vertex of the walk visiting the surface, and the last vertex is pulled perpendicular to the surface by a force. Using the recently proposed flatPERM algorithm, we calculate the
phase diagram for the whole range of temperatures and forces.
We show that an infinite hierarchy of layering transitions exists for model polymers in solution under poor solvent or low temperatures and near an attractive surface.
We find re-entrant behaviour from stretched phase into these layering phases when an appropriate force is applied to the polymer.

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