材料科学
液晶
掺杂剂
单体
胆甾液晶
平面的
聚合
相(物质)
光电子学
光学
条纹
兴奋剂
聚合物
复合材料
有机化学
化学
计算机图形学(图像)
物理
计算机科学
作者
Yin Shen,Shuibing Ge,Xiaoshuai Li,Yun Zhao,Hongmei Ma,Yubao Sun
标识
DOI:10.1021/acsami.3c07287
摘要
The planar state of a cholesteric liquid crystal (CLC) often exhibits oily streak defects, which negatively impact the characteristics of precision optics, including transmission and selective reflection. In this paper, we introduced polymerizable monomers into liquid crystals and examined the effects of monomer concentration, polymerization light intensity, and chiral dopant concentration on oily streak defects in CLC. With the proposed method of heating cholesteric liquid crystals to the isotropic phase followed by rapid cooling, the oil streak defects presented in the liquid crystal can be successfully eliminated. Furthermore, a stable focal conic state can be obtained by a slow cooling process. Two stable states with different optical properties can be obtained based on the cholesteric liquid crystal at different cooling rates, which makes it possible to detect whether the stored procedure of temperature-sensitive material is qualified. These findings have widespread applications in devices that require a planar state without oily streak defects and temperature-sensitive detection devices.
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