General Phase-structure Relationship in Polar Rod-shaped Liquid Crystals: Importance of Shape Anisotropy and Dipolar Strength
General Phase-structure Relationship in Polar Rod-shaped Liquid Crystals: Importance of Shape Anisotropy and Dipolar Strength
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极性棒状液晶中的一般相结构关系：形状各向异性和偶极强度的重要性
DOI：
10.1016/j.giant.2022.100109
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发表时间：
2022
期刊：
影响因子：
7
通讯作者：
Mingjun Huang
中科院分区：
文献类型：
--
作者：
Jinxing Li;Zhidong Wang;Minghu Deng;Yuanyuan Zhu;Xinxin Zhang;Runli Xia;Yaohao Song;Yuki Hisai;S. Aya;Mingjun Huang
铁电性是一种自发极化性质，在现代电光应用中具有极其重要的意义。然而，它的观察主要限于固体或手性近晶C液晶几乎没有流动性。流体铁电体，称为铁电向列相，最近成为可通过将强极性的非极性液晶取向场。在此，我们提出了一个合理的原则，设计的铁电材料和控制其相行为。我们发现，虽然非极性的第二阶张量的非极性的双态有序起源于非极性双态的形状各向异性，极化场作为一个额外的机制，稳定极性双态。基于对约150种化学性质不同的极性棒状分子的一系列全面的检查和机器学习驱动的分析，我们发现形状各向异性和偏振场之间的相互作用引起了极性液晶行为的多样化。该策略提供了更广泛的设计灵活性，并可能促进未来极性功能液晶的发展。
Ferroelectricity is a property with spontaneous polarization, which is of paramount importance in modern electrooptic applications. Yet, its observations are mostly limited to solids or chiral smectic C liquid crystals with nearly no fluidity. The fluidic ferroelectrics, called ferroelectric nematics, have recently become available by incorporating strong polarity into the apolar liquid crystalline orientational field. Here, we present a rational principle for designing the ferroelectric materials and controlling their phase behaviors. We reveal that, while the apolar nematic order with the second-rank tensor originates from the shape anisotropy in the apolar nematic state, the polarization field serves as an additional mechanism for stabilizing polar nematic orders. Based on a comprehensive set of examinations and machine-learningdriven analyses for about 150 chemically distinct polar rod-shaped molecules, we uncover that the interplay between the shape anisotropy and polarization field gives rise to a diversification of the polar liquid crystal behaviors. The strategy offers much broader design flexibility and may facilitate the development of future polar functional liquid crystals.
DOI：
10.1073/pnas.2002290117
发表时间：
2020-06-23
影响因子：
11.1
作者：
Chen, Xi;Korblova, Eva;Clark, Noel A.
通讯作者：
Clark, Noel A.