Publication Title

Physical Review Letters

Publication Date

2-25-2005

Document Type

Article

DOI

10.1103/PhysRevLett.94.077803

Keywords

Films, Morphology, Polyimide, Polymers, Angles

Disciplines

Physics

Abstract

The mechanism responsible for liquid crystal (LC) alignment on mechanically buffed or UV exposed polymer films is poorly understood. A comprehensive study of LC alignment on variously prepared substrates unequivocally shows that the anisotropy in the surface roughness of the substrate completely determines the direction of LC alignment. In all the cases studied, including those where an anchoring transition occurs with temperature, the LC director (re)aligns in the directions of low roughness.

Comments

Copyright 2005 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.94.077803.


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