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Photo-driven liquid crystal cell using azobenzene-grafted ladderlike polysiloxane as command layer

✍ Scribed by Yongxin Tang; Dongsheng Liu; Ping Xie; Rongben Zhang

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 467 KB
Volume: 17
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.1996.030171102

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✦ Synopsis

Abstract

A novel photo‐driven liquid crystal (LC) cell was fabricated by sandwiching nematic LC molecules between two quartz plates whose surface was modified with 4‐hexyloxy‐4′‐undecanyloxyazobenzene (6Az11)‐grafted ladderlike copoly(methylhydrosilsesquioxane) (PMHSQ). Reversible changes of the alignment between homeotropic and planar modes were achieved. The transmittance through the cell and crossed polarizers could be controlled by the irradiation intensity of 365 nm UV light. A high contrast ratio over 100:1 was obtained.

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✍ Yongxin Tang; Ping Xie; Dongsheng Liu; Rongben Zhang; Zhiyong Zhang; Naiyan Yao 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 627 KB

## Abstract In comparison with our previous work^1^, the stability of the command layer based on an azobenzene‐grafted ladderlike copoly(hydromethylsilsesquioxane) (PMHSQ) coated on quartz plates, is improved evidently by linking through a coupling reagent (triethoxyvinylsilane) to the backbone. Th