Entropic wetting and many-body induced layering in a model colloid-polymer mixture |
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Authors: | Dijkstra Marjolein van Roij René |
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Institution: | Debye Institute, Utrecht University, Princetonpln 5, 3584 CC Utrecht, The Netherlands. |
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Abstract: | We develop an efficient simulation scheme to study a model suspension of equally sized colloidal hard spheres and nonadsorbing ideal polymer coils, both in bulk and adsorbed against a planar hard wall. The many-body character of the polymer-mediated effective interactions between the colloids yields a bulk phase diagram and adsorption phenomena that differ substantially from those found for pairwise simple fluids; e.g., we find an anomalously large bulk liquid regime and, far from the bulk triple point, three layering transitions in the partial wetting regime prior to a transition to complete wetting by colloidal liquid. |
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