Your browser doesn't support javascript.
loading
Bjerrum pairs in ionic solutions: A Poisson-Boltzmann approach.
Adar, Ram M; Markovich, Tomer; Andelman, David.
Afiliación
  • Adar RM; Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel.
  • Markovich T; Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel.
  • Andelman D; Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel.
J Chem Phys ; 146(19): 194904, 2017 May 21.
Article en En | MEDLINE | ID: mdl-28527430
Ionic solutions are often regarded as fully dissociated ions dispersed in a polar solvent. While this picture holds for dilute solutions, at higher ionic concentrations, oppositely charged ions can associate into dimers, referred to as Bjerrum pairs. We consider the formation of such pairs within the nonlinear Poisson-Boltzmann framework and investigate their effects on bulk and interfacial properties of electrolytes. Our findings show that pairs can reduce the magnitude of the dielectric decrement of ionic solutions as the ionic concentration increases. We describe the effect of pairs on the Debye screening length and relate our results to recent surface-force experiments. Furthermore, we show that Bjerrum pairs reduce the ionic concentration in bulk electrolyte and at the proximity of charged surfaces, while they enhance the attraction between oppositely charged surfaces.

Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: J Chem Phys Año: 2017 Tipo del documento: Article País de afiliación: Israel

Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: J Chem Phys Año: 2017 Tipo del documento: Article País de afiliación: Israel