13-01E

In the framework of the field theory approach we study equilibrium properties of a two-Yukawa fluid confined by a hard wall. We derive mean field equations allowing for numerical evaluation of the density profile which is compared to different analytical estimations. Beyond the mean field approximation analytical expressions for the free energy and the correlation function are derived. Subsequently contributions to the density profile and the adsorption coefficient due to Gaussian fluctuations are found. As a result, an oscillating profile and a non-monotonic adsorption coefficient as a function of the density or the temperature are observed for some systems. Both the mean field and the fluctuation terms of the density profile are shown to satisfy the contact theorem.