A new approach to photoalignment: photo-addition to a self-assembled monolayer

作者:Droege Stefan; O'Neill Mary*; Loebbert Andreas; Kitney Stuart P; Kelly Stephen M; Wei Pan; Dong Dewen
来源:Journal of Materials Chemistry, 2009, 19(2): 274-279.
DOI:10.1039/b812226a

摘要

Photoalignment used to control the orientation of nematic liquid crystals in LCDs usually involves the photochemical modification of the chemical structure of an organic thin film so that an optical and/or steric anisotropy is developed. We now demonstrate a novel photoadditive alternative whereby small photoreactive molecules are bound to a photoreactive SAM surface by irradiation with polarised UV so that the surface properties are changed and a surface anisotropy is developed.