Structure of binary hard-sphere mixtures near a hard wall: A simple weighted-density-functional approach

The structure of binary hard-sphere mixtures near a hard wall is studied us ing a density functional theory. The formalism is based on a simple weighte d density approach for the one-particle correlation functions of the nonuni form system, and requires as input only the one- and two-particle direct co rrelation functions of the corresponding uniform system. The approach is de signed in a way, where the weight function is decoupled from the weighted d ensity. Numerical results on the density profiles are shown to compare well with available simulation data. (C) 1999 American Institute of Physics. [S 0021-9606(99)50738-1].