Shim Kyoo Sung, Heo Jeong Uk, Jo Soo In, Lee You-Jin, Kim Hak-Rin, Kim Jae-Hoon, Yu Chang-Jae
Opt Express. 2014 Jun 30;22(13):15467-72. doi: 10.1364/OE.22.015467.
We report a pitch invariance in cholesteric liquid crystals (CLCs) independent of temperature by mixing two chiral dopants. One dopant tends to shorten the helical pitch of the CLC, but the other makes the pitch longer, with increasing temperatures. From an analysis of temperature dependencies of the pitch for each dopant, we determined the mixing ratio of two chiral dopants for the pitch invariance. Finally, we obtained the pitch-invariant CLCs to temperature and the helical twisting power of the mixed dopant was estimated.
我们报告了一种通过混合两种手性掺杂剂实现的胆甾相液晶（CLC）中与温度无关的螺距不变性。一种掺杂剂倾向于缩短CLC的螺旋螺距，但另一种掺杂剂会使螺距随温度升高而变长。通过分析每种掺杂剂螺距的温度依赖性，我们确定了两种手性掺杂剂实现螺距不变性的混合比例。最后，我们获得了对温度螺距不变的CLC，并估算了混合掺杂剂的螺旋扭曲力。
