Title

Characteristics of Driven Polymer Surfaces: Growth and Roughness

Document Type

Article

Publication Date

2-1-2000

Department

Physics and Astronomy

Abstract

Using a Monte Carlo simulation, the growth and roughness characteristics of polymer surfaces are studied in 2+1 dimensions. Kink-jump and reptation dynamics are used to move polymer chains under a driving field where they deposit onto an impenetrable attractive wall. Effects of field (E), chain length (L(c)), and the substrate size (L) on the growing surfaces are studied. In low field, the interface width (W) shows a crossover from one power-law growth in time (W similar to t(beta 1)) to another (W similar to t(beta 2)), before reaching its asymptotic value (W(s)), with beta(1)(similar to 0.5+/-0.1)< beta(2)(similar to 0.6-1.0). For short chain lengths (L(c)=4), the saturated width (W(s)) is independent of the substrate length (L), while for long chain lengths, W(s), decays with L, before becoming independent at large L. W(s) depends strongly on the magnitude of the field: for short chains, W(s)similar to E(-delta) with delta similar or equal to 0.4, while for long chains, it varies nonmonotonically with E.

Publication Title

Physical Review E

Volume

61

Issue

2

First Page

1793

Last Page

1799