Abstract

Depletion forces in homogeneous and inhomogeneous binary colloidal mixtures in twodimensions are accounted for by a theoretical approach based on a contraction of thedescription of liquid mixtures, as well as by computer simulations. We study the depletioninteractions in concentrated binary mixtures of additive and non-additive harddiscs. The wall–particle depletion potential for a disc close to a hard wall with aconcave curvature, or with a relief pattern, is obtained in the infinitely dilute limit,as well as the depletion potentials in mixtures of hard discs and hard plates.

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