Adsorption of a polydisperse soft-sphere fluid in a slit pore

摘要

A fundamental-measure theory for a soft-sphere fluid has been estended to the study of the adsorption for a polydisperse soft-sphere fluid within a slit pore.The preferred species in a slit pore depends on the proe sixe and softnes sofa polydisperse soft-sphere fluid,but does not depend on the bulk packing fraction of a polydisperse soft-sphere fluid.For a fixed slit pore,the pore average mole fraction is nearly independent from the density development of a confined polydisperse soft-sphere fluid.The pore average mole fraction for small particles decreases linearly with increasing the pore size.Thelocal relative concentration oscillates with a spatical period close to the diameter of a large particle the same way as the equilibrium particle density distribution.