Title

Anisotropic Surface Morphology of Azopolymer Films Generated by Polarized UV Light Irradiation

Publication Title

Liquid Crystals

Publication Date

2001

Document Type

Article

DOI

10.1080/02678290010022137

Disciplines

Physics

Abstract

X-ray reflectivity measurements reveal anisotropy of the vertical surface roughness caused by exposure to linearly polarized UV (LPUV) light in the films of two azopolymers. The irradiated surface is found to have higher roughness in the direction parallel to the direction of polarization than in the orthogonal direction. The photo-modification of the surface morphology is caused by spatial changes induced in polymer films by LPUV irradiation. The important role of surface roughness anisotropy in determining the alignment of liquid crystals is discussed.

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