Abstract
The rational function approximation method, density functional
theory, and NVT Monte Carlo simulation are used to obtain the
density profiles of multicomponent hard-sphere mixtures near a
planar hard wall. Binary mixtures with a size ratio 1:3 in
which both components occupy a similar volume are specifically
examined. The results indicate that the present version of density
functional theory yields an excellent overall performance. A
reasonably accurate behavior of the rational function approximation
method is also observed, except in the vicinity of the first
minimum, where it may even predict unphysical negative values.
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