Abstract
The solvent-mediated force between colloidal particles in a liquid is studied with the use of the model system consisting of the solvent spheres and the solute spheres (colloidal particles): spheres interact through Yukawa-type potentials with different damping factors. The study is based on the mean spherical approximation solution of the Ornstein-Zernike equation with the closure of three Yukawa terms. In the case of the lyophobic solute in the dilute limit, the dependence of the solvent-mediated force on the interaction between solvent spheres is investigated in relation to the exponential decay nature of the force measured in the range shorter than about 15 nm. The result is consistent with the experimental one.
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