Wetting and drying transitions in mean-field theory: describing the surface parameters for the theory of Nakanishi and Fisher in terms of a microscopic model.

The theory of Nakanishi and Fisher [Phys. Rev. Lett.

Interfacial properties of colloid-polymer mixtures.

Density functional theory and a virial approach are used to calculate the surface tension and bending rigidity of the interface between demixed fluid phases for a colloid-polymer mixture. The calculated surface tension compares well with results from computers simulations and experiments. The bending rigidity obtained from both theoretical approaches is negative (approximately equal to -0.