具有垂直表面锚定的胆甾相液滴中的取向结构。

Orientational structures in cholesteric droplets with homeotropic surface anchoring.

作者信息

Krakhalev Mikhail N, Rudyak Vladimir Yu, Prishchepa Oxana O, Gardymova Anna P, Emelyanenko Alexander V, Liu Jui-Hsiang, Zyryanov Victor Ya

机构信息

Kirensky Institute of Physics, Federal Research Center - Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russia and Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russia.

Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.

出版信息

Soft Matter. 2019 Jul 17;15(28):5554-5561. doi: 10.1039/c9sm00384c.

DOI:10.1039/c9sm00384c

PMID:31243424

Abstract

The dependency of orientational structures in cholesteric droplets with homeotropic surface anchoring on the helicity parameter has been studied by experiment and simulations. We have observed a sequence of structures, in which the director configurations and topological defects were identified by comparison of polarized microscopy pictures with simulated textures. A toron-like and low-symmetry intermediate layer-like structures have been revealed and studied in detail. The ranges of stability of the observed structures have been summarized in a general diagram and explained by the helicity parameter dependence of the free energy terms.

摘要

通过实验和模拟研究了具有垂直表面锚定的胆甾相液滴中取向结构对螺旋度参数的依赖性。我们观察到了一系列结构，其中通过将偏振显微镜图像与模拟纹理进行比较来识别指向矢构型和拓扑缺陷。已经揭示并详细研究了一种类toron和低对称性中间层状结构。所观察到的结构的稳定性范围已总结在一个总图中，并通过自由能项对螺旋度参数的依赖性进行了解释。