Abstract

The layering of like-charged particles or macroions confined by two plane-parallel and two inclined surfaces is studied using a canonical Monte Carlo method combined with a simulation cell that contains both the confined and bath regions. The macroion solution is modelled within a one-component fluid approach that in an effective way incorporates a conventional double layer repulsion due to the ions of suspending electrolyte as well as an extra contribution due to the discrete nature of an aqueous solvent. The plane parallel and wedge-shaped geometries mimic the confinements that naturally occur in large number of systems widely known as colloidal dispersions. The effects of macroion charge, macroion and electrolyte concentrations on the particle layering and in-layer structuring are analyzed. The relation of obtained results to experiments on confined ionic micelle solutions and suspensions of charged polysterene spheres is discussed.

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