Surface Alignment and Anchoring Transitions in Nematic Lyotropic Chromonic Liquid Crystal
Surface Alignment and Anchoring Transitions in Nematic Lyotropic Chromonic Liquid Crystal
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DOI：
10.1103/physrevlett.105.017801
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发表时间：
2010-06-28
影响因子：
8.6
通讯作者：
Lavrentovich, O. D.
中科院分区：
文献类型：
--
作者：
Nazarenko, V. G.;Boiko, O. P.;Lavrentovich, O. D.
溶致发色液晶的表面取向不仅可以是平面的（切向的），而且还可以是垂直的，自组装聚集体垂直于基板，如通过映射光学延迟和通过指向矢场的三维成像所证明的。随着时间的推移，垂面对称线经历到切向状态的转变。锚定过渡是不连续的，可以用双阱锚定势来描述，其中两个极小值对应于切向和垂面取向。
The surface alignment of lyotropic chromonic liquid crystals can not only be planar (tangential) but also homeotropic, with self-assembled aggregates perpendicular to the substrate, as demonstrated by mapping optical retardation and by three-dimensional imaging of the director field. With time, the homeotropic nematic undergoes a transition into a tangential state. The anchoring transition is discontinuous and can be described by a double-well anchoring potential with two minima corresponding to tangential and homeotropic orientation.