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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