Spontaneous Anchoring-Mediated Topography of an Orientable Fluid
Spontaneous Anchoring-Mediated Topography of an Orientable Fluid
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DOI：
10.1103/physrevlett.126.057803
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发表时间：
2021-02-04
影响因子：
8.6
通讯作者：
Atherton, Timothy J.
中科院分区：
文献类型：
--
作者：
Ferris, Andrew J.;Rosenblatt, Charles;Atherton, Timothy J.
牛顿流体中的地形是在表面附近有扰动时出现的。但如果没有这种干扰呢？我们表明，通过光学轮廓术，一个薄的反射膜上的拓扑缺陷图案化的基板上休息可以表现出一个小山或dilemma在相对的自由（空气）接口在该接口的拓扑干扰的情况下。我们提出了一个模型，结合了几种材料的性能，并预测的主要实验功能。这项工作表明，特别是各向异性的表面相互作用在创建一个自由表面的地形的重要性。
A topography in a Newtonian fluid occurs if there is a disturbance near the surface. But what if there is no such disturbance? We show by optical profilometry that a thin nematic film resting on a topological-defect-patterned substrate can exhibit a hill or divot at the opposing free (air) interface in the absence of a topological disturbance at that interface. We propose a model that incorporates several material properties and that predicts the major experimental features. This work demonstrates the importance of, in particular, anisotropic surface interactions in the creation of a free-surface topography.