In situ self-assembled homeotropic alignment layer for fast-switching liquid crystal devices

被引：13

作者：

Son, Intae ^{[1
]}

Lee, Byungsun ^{[1
]}

Kim, Chunho ^{[1
]}

Kim, Jae Hong ^{[1
]}

Yoo, Ji Yong ^{[1
]}

Lee, Jun Hyup ^{[1
]}

机构：

[1] Myongji Univ, Dept Chem Engn, Yongin, South Korea

来源：

LIQUID CRYSTALS | 2016年 / 43卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

Homeotropic alignment; self-assembly; liquid crystal device; hydrogen bonding; VERTICAL ALIGNMENT; THIN-FILM; NANOPARTICLES; GLASS;

D O I：

10.1080/02678292.2015.1124464

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We propose a novel method for homeotropic alignment of liquid crystals (LCs) utilising in situ self-assembly of a low concentration of 4-(4-heptylphenyl)benzoic acids that form hydrogen bond with the indium tin oxide (ITO) substrates. Stable homeotropic alignment in the LC device is achieved with a simple mixing process of benzoic acid derivative in LC media, and it yields electro-optical performance similar to that achieved with the conventional alignment method using polyimides. It is experimentally confirmed that an ultrathin self-assembled molecular layer of 4-(4-heptylphenyl)benzoic acid formed by hydrogen bonding on ITO substrate makes it possible to attain a reliable homeotropic alignment of LCs. Furthermore, this simple approach provides a cost-effective and stable LC alignment layer with fast response time and thermal stability.

引用

收藏

页码：517 / 523

页数：7

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