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Specific ion effects via ion hydration: II. Double layer interaction by Eli Ruckenstein; Marian Manciu is a Materials Science article available to read on EtoBox.

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A simple modified Poisson-Boltzmann formalism, which accounts also for those interactions between electrolyte ions and colloidal particles not included in the mean potential, is used to calculate the force between two parallel plates. It is shown that the short-range interactions between ions and plates, such as those due to the change in the hydration free energy of a structure-makingybreaking ion that approaches the interface, affect the double layer interaction at large separations through the modification of the surface potential and surface charge density. While at short separations (below the range of the short-range ionhydration forces) the interaction can be attractive, at larger separations the interaction is always repulsive, as in the traditional theory. When the long-range van der Waals interactions between the ions and the system (ion-dispersion interactions) are accounted for in the modified Poisson-Boltzmann approach, an attractive force between plates can be generated. At sufficiently large separations, this attraction can become even stronger than the traditional van der Waals attraction between plates of finite thickness, thus generating a dominant longrange 'doub

Who reads Specific ion effects via ion hydration: II. Double layer interaction?

Author

Eli Ruckenstein; Marian Manciu

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0001-8686)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)