Diblock Copolymer Ordering Induced by Patterned Surfaces Above the Order-Disorder Transition
Abstract
We investigate the morphology of diblock copolymers in the vicinity of flat, chemically patterned surfaces. Using a Ginzburg-Landau free energy, spatial variations of the order parameter are given in terms of a general two-dimensional surface pattern above the order-disorder transition. The propagation of several surface patterns into the bulk is investigated. The oscillation period and decay length of the surface -modes are calculated in terms of system parameters. We observe lateral order parallel to the surface as a result of order perpendicular to the surface. Surfaces which has a finite size chemical pattern (e.g., a stripe of finite width) induces lamellar ordering extending into the bulk. Close to the surface pattern the lamellae are strongly perturbed adjusting to the pattern.
Cite
@article{arxiv.cond-mat/0007055,
title = {Diblock Copolymer Ordering Induced by Patterned Surfaces Above the Order-Disorder Transition},
author = {Yoav Tsori and David Andelman},
journal= {arXiv preprint arXiv:cond-mat/0007055},
year = {2009}
}
Comments
9 pages, 14 figures, to be published in Macromolecules