Modeling planar degenerate wetting and anchoring in nematic liquid crystals
By J. Fournier, P. Galatola. 2005
154 citations recorded by the source corpus.
We propose a simple surface potential favoring the planar degenerate anchoring of nematic liquid crystals, i.e., the tendency of the molecules to align parallel to one another along any direction parallel to the surface. We show that, at lowest order in the tensorial Landau-de Gennes order-parameter, fourth-order terms must be included. We analyze the anchoring and wetting properties of this surface potential. In the nematic phase, we find the desired degenerate planar anchoring, with positive scalar order-parameter and some surface biaxiality. In the isotropic phase, we find, in agreement with experiments, that the wetting layer may exhibit a uniaxial ordering with negative scalar order-parameter. For large enough anchoring strength, this negative ordering transits towards the planar degenerate state.
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry, Organic Chemistry
View Paper: https://www.semanticscholar.org/paper/4cc20566888969c4cdd105bd60f1d27810114cfa
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In Electronic, Optical and Magnetic Materials
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Citations in the corpus
- Ordering nano- and microparticles assemblies with liquid crystals (2013, background): “The equilibrium configurations are obtained through the relaxation of the total free energy composed of the Landau– de Gennes free energy[16] FLdG in bulk and an additional anchoring energy FW at the surface of the colloids.[37,38] Both energies are expressed in terms of Qij components and their spa”