Effects of morphology and concentration of CuS nanoparticles on alignment and electro-optic properties of nematic liquid crystal
Effects of morphology and concentration of CuS nanoparticles on alignment and electro-optic properties of nematic liquid crystal作者机构：Key Laboratory of Bio-lnspired Smart Interfacial Science and Technology Ministry of Education School of Chemistry and EnvironmentBeihang University Beijing 100191 China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2017年第10卷第2期
页 面：618-625页
核心收录：
学科分类：07[理学]
基 金：国家自然科学基金
主 题：liquid crystal CuS nanoparticles vertical alignment electro-optic properties
摘 要：Nanoparticles （NPs） with flower-like and frame morphologies were synthesized from CuS, a remarkable transition-metal sulfide. We introduced two kinds of CuS NPs into a nematic liquid crystal （LC） 4-cyano-4＇-n-pentylbiphenyl （5CB） and investigated the morphology- and concentration-dependent alignment and electro-optic （E-O） effects of CuS NPs on 5CB. A trace amount of flower-like CuS NPs induced a uniform homeotropic orientation of LC molecules; this is attributable to the obtained desirable compact nanosheet structure. Moreover, both flower-like and frame CuS NPs induced a remarkable improvement in the E-O properties of 5CB, and the flower-like CuS/5CB system exhibited a better performance. The doped CuS NPs in the LC host suppressed the shielding effect and strengthened the electric field, resulting in outstanding E-O properties. At a doping concentration of 0.05 wt.%, CuS NPs were well-dispersed and achieved the optimum E-O performance. This study provides a novel method for inducing a uniform orientation and enhanced E-O properties of LC molecules by doping with extraordinary CuS NPs, leading to potential applications in establishing flexible LC displays.
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