Liquid crystal photoalignment properties of polymethylphenylsilane

✍ Scribed by O Yaroshchuk; A Kadashchuk

• Book ID: 104309099
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 97 KB
• Volume: 158
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/s0169-4332(00)00037-4

✦ Synopsis

Ž . Polymethylphenylsilane PMPS , prototype of polysilanes, is considered as photoaligning material for liquid crystals Ž . Ž . LC . The LC photoalignment on PMPS is characterized by the singular low exposure energy E F 50 mJ necessary to produce LC alignment. Dependence of the azimuthal anchoring energy W on the exposure time t is non-monotonous; a exp Ž . curve W t sharply increases, goes through a maximum and decreases to the values close to zero. The easy axis of LC exp alignment is induced in the direction of light polarization. Possible microscopic mechanisms of LC photoalignment on PMPS layers are discussed.