Quartic coupling and its effect on wetting behaviors in nematic liquid crystals |
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| Authors: | Zeng Ming-Ying Holger Merlitz Wu Chen-Xu |
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| Institution: | a Department of Physics and ITPA, Xiamen University, Xiamen 361005, China;b College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China |
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| Abstract: | Based on the fact that rubbed groove patterns also affect the anchoring of liquid crystals at substrates,a quartic coupling is included in constructing the surface energy for a liquid crystal cell.The phase diagram and the wetting behaviors of the liquid crystal cell,bounded by surfactant-laden interfaces in a magnetic field perpendicular to the substrate are discussed by taking the quartic coupling into account.The nematic order increases at the surface while it decreases in the bulk as a result of the introduction of quartic substrate-liquid crystal coupling,indicating that the groove anchoring makes the liquid crystal molecules align more orderly near the substrate than away from it.This causes a different wetting behavior:complete wetting. |
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| Keywords: | quartic coupling surface anchoring energy phase transition wetting behavior |
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