Flexoelectric effect of a rod-like nematic liquid crystal doped with highly-kinked bent-core molecules for energy converting components
Flexoelectric effect of a rod-like nematic liquid crystal doped with highly-kinked bent-core molecules for energy converting components
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DOI：
10.1039/c2sm07270j
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发表时间：
2012-01-01
期刊：
影响因子：
3.4
通讯作者：
Choi, E-Joon
中科院分区：
文献类型：
--
作者：
Lee, Ji-Hoon;Yoon, Tae-Hoon;Choi, E-Joon
本文研究了棒状共轭液晶（戊基氰基联苯，5CB）中掺有具有近似130 °大扭折角的共轭核液晶的挠曲电效应。尽管之前的理论模型预测这种具有纵向偶极矩的高度扭结分子对挠曲电效应没有显着影响，但掺杂7.0wt%具有纵向偶极矩的弯芯液晶的5CB混合物显示出更大的挠曲电各向异性37.2 pC m（-1）与纯5CB 10.3 pC m（-1）相比。从小角X射线散射实验中，发现的x-core液晶形成局部域包围5CB分子和组装复合物的不同的取向和形状被认为是与更大的挠曲电各向异性。
The flexoelectric effect of a rod-like nematic liquid crystal (pentyl-cyanobiphenyl, 5CB) doped with bent-core liquid crystals with a high kink angle similar to 130 degrees was studied. Although the previous theoretical models predicted that such highly-kinked molecules with a longitudinal dipole moment would have no significant influence on the flexoelectric effect, the 5CB mixture doped with 7.0 wt% bent-core liquid crystal with a longitudinal dipole moment showed greater flexoelectric anisotropy 37.2 pC m(-1) compared to the pure 5CB 10.3 pC m(-1). From the small angle X-ray scattering experiments, the bent-core liquid crystal was found to form local domains surrounded with 5CB molecules and the varied orientation and shape of the assembled complexes were considered to be related to the greater flexoelectric anisotropy.