Entropically driven ordering in a binary colloidal suspension near a planar wall
- 19 June 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 64 (1), 012401
- https://doi.org/10.1103/physreve.64.012401
Abstract
The local ordering of a binary hard-sphere mixture with a size ratio 1:10 near a planar wall is investigated by means of integral equation theory. We find that when the bulk volume fraction of the smaller particles is greater than 15%, the larger particles (at a bulk volume fraction of 1% and higher) become highly localized on the wall surface, forming a quasi-two-dimensional surface-localized monolayer. Our results are discussed and compared against computer simulation data with an effective one-component Hamiltonian that is based on sphere-sphere and sphere-wall depletion potentials.Keywords
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