Novel alignment layers produced by CVD technique from hydrocarbon plasma

Elena A. Konshina; Vladimir A. Tolmachev; Albert I. Vangonen; Arkady P. Onokhov

doi:10.1117/12.271402

11 April 1997 Novel alignment layers produced by CVD technique from hydrocarbon plasma

Elena A. Konshina, Vladimir A. Tolmachev, Albert I. Vangonen, Arkady P. Onokhov

Proceedings Volume 3015, Liquid Crystal Materials, Devices, and Applications V; (1997) https://doi.org/10.1117/12.271402
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

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.

Citation Download Citation

Elena A. Konshina, Vladimir A. Tolmachev, Albert I. Vangonen, and Arkady P. Onokhov "Novel alignment layers produced by CVD technique from hydrocarbon plasma", Proc. SPIE 3015, Liquid Crystal Materials, Devices, and Applications V, (11 April 1997); https://doi.org/10.1117/12.271402

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