In Situ Homeotropic Alignment of Nematic Liquid Crystals Based on Photoisomerization of Azo-Dye, Physical Adsorption of Aggregates, and Consequent Topographical Modification
作者： Sudarshan Kundu , Myong-Hoon Lee , Seung Hee Lee , Shin-Woong Kang
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摘要: In situ homeotropic alignment is achieved by photochromic trans- to cis-isomerization of an azo-dye doped in a nematic host. The augmented dipole moment the cis-isomer formed under UV-irradiation expedites molecular assembly into crystalline aggregates. Subsequent deposition aggregates creates roughened surface and induces anchoring transition from initial planar LCs.
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