Molecular Shape Related Effects in Liquid Crystals
Molecular Shape Related Effects in Liquid Crystals
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DOI：
10.1080/15421406.2014.976758
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发表时间：
2015-02-11
影响因子：
0.7
通讯作者：
Komitov, Lachezar
中科院分区：
文献类型：
--
作者：
Komitov, Lachezar
液晶是由具有强形状各向异性的分子组成的有机材料。许多研究明确表明，在液晶中观察到的一些重要物理效应很大程度上取决于其分子的形状各向异性。在本次演讲中，概述了液晶中一些与分子形状相关的效应，这些效应在液晶显示器（LCD）和光子器件中具有应用潜力。从平面到垂直的光致排列转变、短节距胆甾型液晶中的弯曲电极化、弯曲芯向列排列以及这些材料中从双折射状态到光学各向同性状态的场驱动转变是本次演讲重点讨论的效应。讨论了分子形状的作用，重点讨论了分子形状对液晶的锚定、挠曲电、光学和电光性质的影响。
Liquid crystals are organic materials constituting of molecules characterized by strong shape anisotropy. Many studies unambiguously showed that some important physical effects observed in liquid crystals are strongly dependent on the shape anisotropy of their molecules.In this talk, some of the molecular shape related effects in liquid crystals, which have a potential for applications in liquid crystal displays (LCDs) and photonic devices, was overviewed. Photo-induced alignment transition from planar to vertical, flexoelectric polarization in short pitch cholesteric liquid crystals, alignment of bent core nematics as well as field driven transition from birefringent to optically isotropic state in these materials are among those effects on which this talk was focused. The role of the molecular shape was discussed with focus on the impact, which it has on the anchoring, flexoelectric, optical and electro-optical properties of the liquid crystals.