Effective interactions in a quenched-annealed hard-sphere mixture confinedin a narrow slit-like pore

We consider a slit-like pore filled with a disordered hard-sphere matrix. T he diameter of matrix species is chosen almost equal to the pore width. Ano ther hard-sphere fluid species, of smaller diameter, enters, at a given che mical potential, into this confined quenched microporous medium. The model is similar to the experimental setup; see G. Cruz de Leon et al. Phys. Rev. Lett. 81, 1122 (1998). The model is solved by using the inhomogeneous repl ica Ornstein-Zernike equations with Percus-Yevick approximation. We discuss the effective interactions between species in a confined medium on the che mical potential and matrix microporosity. (C) 1999 Academic Press.