LETTER TO THE EDITOR

Journal of Colloid and Interface Science
J ForsmanB Jönsson

Abstract

The solvation force between two planar surfaces immersed in a model liquid mimicking water is obtained using Monte Carlo computer simulations and free energy functional theory calculations. When the surfaces are hydrophilic, the solvation force is repulsive, as is the net force, provided the solvent-surface interaction is strong, compared with the surface-surface and solvent-solvent interactions. The range of the surface-solvent interaction is shown to have a profound influence on the resulting solvation force, whereas solvent orientational order is only of minor importance. We conclude that a repulsive force would also be found in a less polar solvent, confined between sufficiently solvophilic surfaces. With hydrophobic surfaces, the solvation force is attractive. The net lowering of solvent density between the surfaces increases the attraction beyond the expected van der Waals interaction. This density depression contribution is substantial even at rather large separations and will be present for all fluids confined between solvophobic surfaces. Our calculations suggest that the famous "hydrophobic force" is often dominated by density depression. Copyright 1997 Academic Press. Copyright 1997Academic Press

References

Sep 22, 1994·Toxicology·I KimberD A Basketter
Oct 1, 1996·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·D A BasketterS E Loveless

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Citations

Jan 15, 1999·The Journal of Hand Surgery : Journal of the British Society for Surgery of the Hand·N J Barton
Aug 6, 2005·The Journal of Chemical Physics·J J Valle-DelgadoM W Rutland
May 1, 2010·The Journal of Physical Chemistry. B·Shyamal K Das, Aninda J Bhattacharyya
Jul 10, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Jirí Janecek, Roland R Netz
May 21, 2005·Advances in Colloid and Interface Science·N V Churaev

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