Cell Gap Dependence of Nematic Backflow around Annihilating Disclination Pair
Cell Gap Dependence of Nematic Backflow around Annihilating Disclination Pair
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湮灭向错对周围向列回流的晶胞间隙依赖性
DOI：
10.1143/jpsj.81.074603
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Y.Yamamura & K. Saito
中科院分区：
文献类型：
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作者：
T. Yanagimachi;S. Yasuzuka;Y.Yamamura & K. Saito
本文报道了在强锚定条件下，4-氰基-4 '-正戊基联苯（5CB）液晶相S = ±1/2向错动力学的实验研究。回流使向错湮灭动力学具有不对称性。为了揭示表面效应对回流的影响，我们观察了不同细胞间隙的向错对的运动。虽然s = ±1/2向错的速度比与理论预测相当，但当速度比减小时，它在晶胞间隙d = 1 µm附近减小。这一观察结果表明，在d = 1 µm的LC单元中，回流受到抑制。通过弹性理论模型计算分析了锚固效应。
This paper reports an experimental study of the dynamics ofs= ±1/2 disclinations in the nematic liquid crystalline (LC) phase of 4-cyano-4'-n-pentylbiphenyl (5CB) under strong anchoring condition. The backflow brings asymmetry in annihilation dynamics of disclinations. To reveal the surface effect on backflow, we observed the motion of disclination pair for a various cell gapd. Although the velocity ratio ofs= ±1/2 disclinations is comparable with a theoretical prediction, it decreased around the cell gapd= 1 µm when velocity ratio was reduced. This observation shows that the backflow is suppressed in the LC cell withd= 1 µm. The anchoring effect is analyzed through a model calculation within an elastic theory.