Hard colloidal rods near a soft wall: Wetting, drying, and symmetry breaking

Within an Onsager-like density functional theory we explore the thermodynamic and structural properties of an isotropic and nematic fluid of hard needle-like colloids in contact with a hard substrate coated with a soft short-ranged attractive or repulsive layer. As a function of the range and the st...

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Bibliographic Details
Published inEurophysics letters Vol. 74; no. 6; pp. 1039 - 1045
Main Authors Shundyak, K, Roij, R. van
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.06.2006
EDP Sciences
Subjects
05.70.Np
61.30.Hn
64.70.Md
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Summary:Within an Onsager-like density functional theory we explore the thermodynamic and structural properties of an isotropic and nematic fluid of hard needle-like colloids in contact with a hard substrate coated with a soft short-ranged attractive or repulsive layer. As a function of the range and the strength of the soft interactions we find wetting and drying transitions, a pre-drying line, and a symmetry-breaking transition from uniaxial to biaxial in the wetting and drying film.
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content type line 23
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i2006-10062-4