title: Entropically driven ordering in a binary colloidal suspension near a planar wall.
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.
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA.
authors.forename: A
authors.initials: A
authors.lastname: Trokhymchuk
authors.forename: D
authors.initials: D
authors.lastname: Henderson
authors.forename: A
authors.initials: A
authors.lastname: Nikolov
authors.forename: D T
authors.initials: DT
authors.lastname: Wasan