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首页> 外文期刊>Liquid crystals today >Recent progresses in lyotropic chromonic liquid crystal research: elasticity, viscosity, defect structures, and living liquid crystals
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Recent progresses in lyotropic chromonic liquid crystal research: elasticity, viscosity, defect structures, and living liquid crystals

机译：Lyotropic发色液晶研究的最新进展：弹性，粘度，缺陷结构和活液晶

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Lyotropic chromonic liquid crystals (LCLCs) are formed by linear stacks of disc-shaped molecular in water. Combined by weak, non-covalent forces, these aggregates are reversible, flexible and polydisperse. The self-assembly nature of the basic building units gives nematic LCLCs interesting physical properties, such as very small twist K_2 constant as compared with splay K_1 and bend K_3 constants, very large splay η_(splay) and twist η_(twist) viscosities, strong temperature dependence of K_1, η_(splay), and η_(twist), diverse responses to different ionic additives, and large and azimuthally asymmetric disclination cores. We discuss our experimental studies on the viscoelastic properties and the fine structure of disclinations of LCLCs and attribute their unusual properties to the fact that LCLC aggregates are not fixed in size, but vary in response to changes of temperature, concentration and ionic content in the system. We further use these properties to explain intriguing phenomena in the 'living liquid crystals' composed of chromonic liquid crystal and motile bacteria Bacillus Subtilis.
机译：通过水溶液中的圆盘状分子的线性叠层形成旋转液发色液晶（LCLC）。结合弱，非共价力，这些聚集体是可逆的，柔性和多分散的。基本建筑单元的自组装性质给出了令人兴趣的物理性质，如非常小的捻度K_2常数与SPLAY K_1和弯曲K_3常数相比，非常大的SPLAYη_（SPLAY）和扭曲η_（扭曲）粘度，强烈K_1，η_（SPLAY）和η_（扭曲），对不同离子添加剂的各种反应以及大而方形不对称的核心的温度依赖性。我们讨论了对粘弹性性质的实验研究和LCLC的公开的细节，并将其不寻常的性质归因于LCLC骨料不固定的事实，但响应于系统中温度，浓度和离子含量的变化而变化。我们进一步使用这些性质来解释在“活液晶”中的有趣现象，由发色液晶和乳杆菌枯草芽孢杆菌组成。

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