Surface tension of electrolyte interfaces: ionic specificity within a field-theory approach.

OFFPRINT Surface tension of electrolyte solutions: A self-consistent theory

We study the surface tension of electrolyte solutions at the air/water and oil/water interfaces. Employing field-theoretical methods and considering short-range interactions of anions with the surface, we expand the Helmholtz free energy to first order in a loop expansion and calculate the excess surface tension. Our approach is self-consistent and yields an analytical prediction that reunites ...

Ionic profiles close to dielectric discontinuities: Specific ion-surface interactions.

We study, by incorporating short-range ion-surface interactions, ionic profiles of electrolyte solutions close to a non-charged interface between two dielectric media. In order to account for important correlation effects close to the interface, the ionic profiles are calculated beyond mean-field theory, using the loop expansion of the free energy. We show that how it is possible to overcome th...

Specific ion effects via ion hydration: I. Surface tension.

A simple modality is suggested to include, in the framework of a modified Poisson-Boltzmann approach, specific ion effects via the change in the ion hydration between the bulk and the vicinity of the surface. This approach can account for both the depletion of the interfacial region of structure-making ions as well as for the accumulation of structure-breaking ions near the interface. Expressio...

Prediction of Surface Tension in Single and Mixed Electrolyte Solutions

Adsorption kinetics of surfactants at fluid-fluid interfaces

H. Diamant 9 Prof. D. Andelman (I~) School of Physics and Astronomy Raymond and Beverly Sackler Faculty of Exact Sciences Tel Aviv University Ramat Aviv 69978 Tel Aviv, Israel Abstract We review a new theoretical approach to the kinetics of surfactant adsorption at fluid-fluid interfaces. It yields a more complete description of the kinetics both in the aqueous solution and at the interface, de...