標題: Cholesteric liquid crystal devices with nanoparticle aggregation
作者: Jeng, Shie-Chang
Hwang, Shug-June
Hung, Yu-Hsiang
Chen, Sheng-Chieh
影像與生醫光電研究所
Institute of Imaging and Biomedical Photonics
公開日期: 11-Oct-2010
摘要: A broadband cholesteric liquid crystal (CLC) device with a multi-domain structure is demonstrated by using an aggregation of polyhedral oligomeric silsesquioxane (POSS) nanoparticles in the CLC layer. The aggregation pattern of the self-assembled POSS nanoparticles depends on the concentration of POSS doped in the mixture of POSS/CLC and the cooling rate of the mixture from a temperature higher than the clear point. POSS-induced changes in the bulk and surface properties of the cholesteric cells, such as a promotion of homeotropic alignment, help to form a cholesteric structure with a broadband reflection of light; the latter can be used for improvement of bistable CLC devices. A higher POSS concentration and a higher cooling rate both improve the appearance of the black-white CLC device. (C) 2010 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.18.022572
http://hdl.handle.net/11536/32079
ISSN: 1094-4087
DOI: 10.1364/OE.18.022572
期刊: OPTICS EXPRESS
Volume: 18
Issue: 21
起始頁: 22572
結束頁: 22577
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