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Issue 5, 2016
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Wetting behaviour and contact angles anisotropy of nematic nanodroplets on flat surfaces

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Abstract

We have studied the wetting behaviour of liquid crystal nanodroplets deposited on a planar surface, modelling the mesogens with Gay-Berne ellipsoids and the support surface with a slab of Lennard-Jones (LJ) spherical particles whose mesogen-surface affinity can be tuned. A crystalline and an amorphous planar surface, both showing planar anchoring, have been investigated: the first is the (001) facet of a LJ fcc crystal, the second is obtained from a disordered LJ glass. In both cases we find that the deposited nanodroplet is, in general, elongated and that the contact angle changes around its contour. Simulations for the crystalline substrate show that the angle of contact turns reversibly from anisotropic to isotropic when crossing the clearing transition. As far as we know this is a novel, not yet explored effect for thermotropic liquid crystals, that we hope will stimulate experimental investigations.

Graphical abstract: Wetting behaviour and contact angles anisotropy of nematic nanodroplets on flat surfaces

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Supplementary files

Article information


Submitted
29 Aug 2015
Accepted
02 Dec 2015
First published
03 Dec 2015

Soft Matter, 2016,12, 1610-1620
Article type
Paper

Wetting behaviour and contact angles anisotropy of nematic nanodroplets on flat surfaces

D. Vanzo, M. Ricci, R. Berardi and C. Zannoni, Soft Matter, 2016, 12, 1610
DOI: 10.1039/C5SM02179K

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