Prolate and oblate chiral liquid crystal spheroids
Prolate and oblate chiral liquid crystal spheroids
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DOI：
10.1126/sciadv.aba6728
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发表时间：
2020-07-01
期刊：
影响因子：
13.6
通讯作者：
de Pablo, Juan J.
中科院分区：
文献类型：
--
作者：
Sadati, Monirosadat;Martinez-Gonzalez, Jose A.;de Pablo, Juan J.
众所周知，液晶在显示和光学技术中具有有趣的纹理和颜色图案。这项工作集中在手性材料上，并研究了当微滴以可控的方式变形为非球形时所产生的形态调色板。具体地说，几何约束和机械应变被用来操纵手性液晶液滴中出现的取向顺序、相变和拓扑缺陷。受自然界中遇到的过程的启发，昆虫和动物经常依靠应变和温度来改变分散的液晶元件的光学外观，手性液滴分散在聚合物薄膜中，并通过单轴或双向拉伸引起变形。我们的测量是通过求助于相应系统的模拟来解释的，从而提供了对这些材料中出现的形态的深入理解。报道的结构和组件为智能涂层、智能织物和可穿戴传感器提供了潜在的应用。
Liquid crystals are known to exhibit intriguing textures and color patterns, with applications in display and optical technologies. This work focuses on chiral materials and examines the palette of morphologies that arises when microdroplets are deformed into nonspherical shapes in a controllable manner. Specifically, geometrical confinement and mechanical strain are used to manipulate orientational order, phase transitions, and topological defects that arise in chiral liquid crystal droplets. Inspired by processes encountered in nature, where insects and animals often rely on strain and temperature to alter the optical appearance of dispersed liquid crystalline elements, chiral droplets are dispersed in polymer films and deformation induced by uniaxial or biaxial stretching. Our measurements are interpreted by resorting to simulations of the corresponding systems, thereby providing an in-depth understanding of the morphologies that arise in these materials. The reported structures and assemblies offer potential for applications in smart coatings, smart fabrics, and wearable sensors.