Generalized effective depletion potentials

Details Generalized effective depletion potentials Generalized effective depletion potentials

2001-02-03

arxiv.org/abs/cond-mat/0102049v2

J. Phys.: Condens. Matter 33, L777 (2001)

Physics

Condensed Matter

Soft Condensed Matter

4 pages 4 figures ReVTeX[epsfig,multicol,amssymb] (v2 - reference added)

Scientific paper

We propose that the behavior of asymmetric binary fluid mixtures with a large class of attractive or repulsive interparticle interactions can be understood by mapping onto effective non-additive hard-sphere models. The latter are best analyzed in terms of their underlying depletion potentials which can be exactly scaled onto known additive ones. By tuning the non-additivity, a wide variety of attractive or repulsive generalized depletion potential shapes and associated phase behavior can be ``engineered'', leading, for example, to two ways to stabilize colloidal suspensions by adding smaller particles.

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