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

By K.Y. Shundyak and R. van Roij


Within an Onsager-like density functional theory we explore the thermodynamic\ud and structural properties of an isotropic and nematic fluid of hard needle-like colloids in contact\ud with a hard substrate coated with a soft short-ranged attractive or repulsive layer. As a function\ud of the range and the strength of the soft interactions we find wetting and drying transitions,\ud a pre-drying line, and a symmetry-breaking transition from uniaxial to biaxial in the wetting\ud and drying film

Topics: Natuur- en Sterrenkunde
Year: 2006
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