Long-range attractions between solutes in near-critical fluids

Phil Attard, C. P. Ursenbach, and G. N. Patey

Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Y6.

Phys. Rev. A 45, 7621-7623 (1992)

Abstract
The Ornstein-Zernike equation is used to analyze adsorption at, and the forces between, solutes and walls in near-critical fluids. The density profile is shown to decay exponentially with the bulk correlation length. The forces between solutes and between walls are also exponentially long ranged with the bulk correlation length, and are always attractive for identical solutes.

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