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Wetting of cholesteric liquid crystals.

Nuno M Silvestre1, Maria Carolina Figueirinhas Pereira2, Nelson R Bernardino2

  • 1Centro de Física Teórica e Computacional and Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Lisboa, Portugal. nmsilvestre@fc.ul.pt.

The European Physical Journal. E, Soft Matter
|February 28, 2016
PubMed
Summary

We theoretically investigated how cholesteric liquid crystals wet substrates. Distorted liquid crystal layers near the substrate can either promote or hinder wetting, depending on material properties.

Keywords:
Topical Issue: Wetting and Drying: Physics and Pattern Formation

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Area of Science:

  • Physics
  • Materials Science

Background:

  • Cholesteric liquid crystals exhibit unique helical structures.
  • Understanding their interaction with surfaces is crucial for applications.

Purpose of the Study:

  • To theoretically investigate the wetting behavior of cholesteric liquid crystals on planar substrates.
  • To determine how substrate interactions and anchoring conditions influence wetting.

Main Methods:

  • Theoretical investigation of liquid crystal layer distortion at the substrate interface.
  • Analysis of the free cholesteric-isotropic interface and topological defects.

Main Results:

  • Wetting properties are similar to nematic liquid crystals when layers are undistorted.
  • Distorted liquid crystal layers lead to a non-planar interface and topological defects.
  • These deformations can either promote or hinder substrate wetting.

Conclusions:

  • The wetting of substrates by cholesteric liquid crystals is highly dependent on anchoring conditions.
  • Surface-induced deformations and topological defects play a critical role in determining wetting behavior.