Anisotropic surface morphology of azopolymer films generated by polarized UV light irradiation

Autor:	Dena Mae G. Agra, Satyendra Kumar, Oleg Yaroshchuk, Liang-Chy Chien, J. Lindau, Yu. Zakrevskyy
Rok vydání:	2001
Předmět:	chemistry.chemical_classification Materials science business.industry Linear polarization General Chemistry Polymer Surface finish Condensed Matter Physics Polarization (waves) chemistry Liquid crystal Surface roughness Optoelectronics General Materials Science Irradiation Anisotropy business
Zdroj:	Liquid Crystals. 28:703-707
ISSN:	1366-5855 0267-8292
DOI:	10.1080/02678290010022137
Popis:	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.
Databáze:	OpenAIRE
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