Department of Mathematical Sciences and Center for Applied Mathematics and Statistics New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
Phys Rev E. 2018 Mar;97(3-1):032704. doi: 10.1103/PhysRevE.97.032704.
The interaction between nematic liquid crystals and polymer-coated substrates may lead to slow reorientation of the easy axis (so-called "director gliding") when a prolonged external field is applied. We consider the experimental evidence of zenithal gliding observed by Joly et al. [Phys. Rev. E 70, 050701 (2004)PLEEE81539-375510.1103/PhysRevE.70.050701] and Buluy et al. [J. Soc. Inf. Disp. 14, 603 (2006)1071-092210.1889/1.2235686] as well as azimuthal gliding observed by S. Faetti and P. Marianelli [Liq. Cryst. 33, 327 (2006)LICRE60267-829210.1080/02678290500512227], and we present a simple, physically motivated model that captures the slow dynamics of gliding, both in the presence of an electric field and after the electric field is turned off. We make a quantitative comparison of our model results and the experimental data and conclude that our model explains the gliding evolution very well.
当长时间施加外部电场时，向列液晶与聚合物涂层基底之间的相互作用可能导致易轴（所谓的“指向矢滑动”）的缓慢重新取向。我们考虑了 Joly 等人 [Phys. Rev. E 70, 050701 (2004)PLEEE81539-375510.1103/PhysRevE.70.050701] 和 Buluy 等人 [J. Soc. Inf. Disp. 14, 603 (2006)1071-092210.1889/1.2235686] 观察到的天顶滑动实验证据，以及 S. Faetti 和 P. Marianelli [Liq. Cryst. 33, 327 (2006)LICRE60267-829210.1080/02678290500512227] 观察到的方位角滑动，并提出了一个简单的、基于物理的模型，该模型捕获了滑动的缓慢动力学，包括在存在电场和电场关闭后的情况。我们对模型结果和实验数据进行了定量比较，并得出结论，我们的模型很好地解释了滑动演化。
