Configurational entropy of adsorbed particles on two-dimensional heterogeneous surfaces

Abstract

The configurational entropy of repulsive interacting particles adsorbed on heterogeneous surfaces is studied by combining Monte Carlo simulation and thermodynamic integration method. The substrate is represented by a bivariate lattice characterized by l × l patches of weak and strong adsorbing sites, arranged in a deterministic chessboard structure. The temperature is varied in such a way that different ordered phases can be formed on the surface. A rich variety of behaviors is found and analyzed in the context of the lattice-gas model.