Toroidal nuclei of columnar lyotropic chromonic liquid crystals coexisting with an isotropic phase
Toroidal nuclei of columnar lyotropic chromonic liquid crystals coexisting with an isotropic phase
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DOI：
10.1039/d2sm00712f
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发表时间：
2022-07-29
期刊：
影响因子：
3.4
通讯作者：
Lavrentovich, Oleg D.
中科院分区：
文献类型：
--
作者：
Koizumi, Runa;Golovaty, Dmitry;Lavrentovich, Oleg D.
从各向同性状态出现的有序材料的核通常表现出拓扑上等同于球体的形状;众所周知的例子是晶体和微液晶滴。在这项工作中，我们从实验和理论上探讨了与各向同性相共存的柱状溶致有色液晶的环形核。这些环形的几何形状强烈地依赖于色甘酸二钠（DSCG）和拥挤剂聚乙二醇（PEG）的浓度。高浓度的DSCG和PEG导致具有小中心孔的厚环形，而低浓度产生具有宽孔的薄环形。弯曲弹性和各向异性界面张力的平衡解释了所观察到的形状的众多。
Nuclei of ordered materials emerging from the isotropic state usually show a shape topologically equivalent to a sphere; the well-known examples are crystals and nematic liquid crystal droplets. In this work, we explore experimentally and theoretically the toroidal in shape nuclei of columnar lyotropic chromonic liquid crystals coexisting with the isotropic phase. The geometry of these toroids depends strongly on concentrations of the disodium cromoglycate (DSCG) and the crowding agent, polyethylene glycol (PEG). High concentrations of DSCG and PEG result in thick toroids with small central holes, while low concentrations yield thin toroids with wide holes. The multitude of the observed shapes is explained by the balance of bending elasticity and anisotropic interfacial tension.