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Proceedings Paper

Orientation of a nematic liquid crystal near a polymer layer determined by Fourier transform infrared spectroscopy
Author(s): P. Gautier; S. Araki; Tetsuya Miyashita; Tatsuo Uchida
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Paper Abstract

The comprehension of the mechanism of alignment of a liquid crystal by a rubbed polymer layer is a current interest from a fundamental point of view but also in regards to applications. To understand the mechanism of alignment it is necessary to clarify how the liquid crystal is oriented near a surface. A nematic liquid crystal (LC) has a longer a uniaxial symmetry near a rubbed polymer surface but exhibits a biaxial orientation. We probed the thickness dependence of the orientation of a LC using Fourier Transform Infrared Spectroscopy. By this method it can be shown that the order parameter is lower near the surface than in the bulk and that the symmetry of a nematic liquid crystal close to the surface of the alignment layer is not longer uniaxial.

Paper Details

Date Published: 27 June 2002
PDF: 5 pages
Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); doi: 10.1117/12.472163
Show Author Affiliations
P. Gautier, Tohoku Univ. (Japan)
S. Araki, Tohoku Univ. (Japan)
Tetsuya Miyashita, Tohoku Univ. (Japan)
Tatsuo Uchida, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 4759:
XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications

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