Orientation of a nematic liquid crystal near a polymer layer determined by Fourier transform infrared spectroscopy

P. Gautier; S. Araki; Tetsuya Miyashita; Tatsuo Uchida

doi:10.1117/12.472163

27 June 2002 Orientation of a nematic liquid crystal near a polymer layer determined by Fourier transform infrared spectroscopy

P. Gautier, S. Araki, Tetsuya Miyashita, Tatsuo Uchida

Author Affiliations +

Proceedings Volume 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications; (2002) https://doi.org/10.1117/12.472163
Event: XIV Conference on Liquid Crystals, Chemistry, Physics, and Applications, 2001, Zakopane, Poland

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.

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P. Gautier, S. Araki, Tetsuya Miyashita, and Tatsuo Uchida "Orientation of a nematic liquid crystal near a polymer layer determined by Fourier transform infrared spectroscopy", Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); https://doi.org/10.1117/12.472163

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