Ion-Specific Hydration Effects: Extending the Poisson-Boltzmann Theory

Details Ion-Specific Hydration Effects: Extending the Poisson-Boltzmann Theory Ion-Specific Hydration Effects: Extending the Poisson-Boltzmann Theory

2011-03-23

arxiv.org/abs/1103.4590v1

Curr. Opin. Colloid Interface Sci., 16, 542 (2011)

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 2 figures

Scientific paper

In aqueous solutions, dissolved ions interact strongly with the surrounding water, thereby modifying the solution properties in an ion-specific manner. These ion-hydration interactions can be accounted for theoretically on a mean-field level by including phenomenological terms in the free energy that correspond to the most dominant ion-specific interactions. Minimizing this free energy leads to modified Poisson-Boltzmann equations with appropriate boundary conditions. Here, we review how this strategy has been used to predict some of the ways ion-specific effects can modify the forces acting within and between charged interfaces immersed in salt solutions.

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