A Mean-Field Photoreaction Model for the Pretilt Generation of a Liquid Crystal on Photopolymer Layers upon Ultraviolet Exposure
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概要
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We present a mean-field photoreaction model for the pretilt generation of a nematic liquid crystal (NLC) on the surfaces of photopolymers upon the exposure of ultraviolet (UV) light. The angular distribution function of photopolymer side chains, calculated in the photoreaction model, is used for determining the surface anchoring energy within the Rapini--Papoular approximation. The pretilt angle transition from the homeotropic alignment to the planar alignment of the NLC is demonstrated in two photopolymers with different alkyl chain lengths as a function of the UV exposure time. The main features of the experimental results agree well with theoretical predictions.
- 2011-03-25
著者
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Lee Sin-doo
School Of Electric Engineering #32 Seoul National University
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Kim Jinyool
School Of Electrical Engineering #32 Seoul National University
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Na Jun-Hee
School of Electrical Engineering #32, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Korea
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Lee Sin-Doo
School of Electrical Engineering, Seoul National University, Kwanak P. O. Box 34, Seoul 151-600, Korea
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Yu Chang-Jae
Department of Electronic Engineering, Hanyang University, Seoul 133-791, Korea
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Pae Hyungwu
School of Electrical Engineering, Seoul National University, Kwanak P. O. Box 34, Seoul 151-600, Korea
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Kim Jinyool
School of Electrical Engineering, Seoul National University, Kwanak P. O. Box 34, Seoul 151-600, Korea
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Na Jun-Hee
School of Electrical Engineering, Seoul National University, Kwanak P. O. Box 34, Seoul 151-600, Korea
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