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Proceedings Paper

Novel alignment layers produced by CVD technique from hydrocarbon plasma
Author(s): Elena A. Konshina; Vladimir A. Tolmachev; Albert I. Vangonen; Arkady P. Onokhov
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Paper Abstract

Planar and homeotropic orientations of nematic liquid crystals have been obtained using novel alignment layers which were prepared by plasma-activated chemical vapor deposition (CVD) of a hydrocarbon vapor. Optical constants and porosity of the layers were characterized ellipsometrically. Layer surface energies were estimated from measuring the contact angles. Molecular structure of the alignment layers and orientation of the liquid crystals on their surfaces were studied using the IR spectroscopy. The layers are transparent in the visible region and their refractive index is very close to that of the liquid crystal. The determination of a dichroic ratio and of an order parameter of the IR absorption bands of the aligned liquid crystal shows the planar and homeotropic alignment of cyanobiphenyl molecules to be stable on the alignment layers.

Paper Details

Date Published: 11 April 1997
PDF: 9 pages
Proc. SPIE 3015, Liquid Crystal Materials, Devices, and Applications V, (11 April 1997); doi: 10.1117/12.271402
Show Author Affiliations
Elena A. Konshina, S.I. Vavilov State Optical Institute (Russia)
Vladimir A. Tolmachev, S.I. Vavilov State Optical Institute (Russia)
Albert I. Vangonen, S.I. Vavilov State Optical Institute (Russia)
Arkady P. Onokhov, S.I. Vavilov State Optical Institute (Russia)

Published in SPIE Proceedings Vol. 3015:
Liquid Crystal Materials, Devices, and Applications V
Ranganathan Shashidhar, Editor(s)

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