Details

Autor(en) / Beteiligte

• Budkov, Yu. A.
• Kolesnikov, A. L.
• Kiselev, M. G.

Titel

A modified Poisson-Boltzmann theory: Effects of co-solvent polarizability

Ist Teil von

• Europhysics letters, 2015-07, Vol.111 (2), p.28002-p1-28002-p6

Ort / Verlag

EDP Sciences, IOP Publishing and Società Italiana di Fisica

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this paper within a field-theoretical approach taking into account explicitly a co-solvent with a nonzero dipole and a polarizability tensor, we derive a modified Poisson-Boltzmann equation. Applying the modified Poisson-Boltzmann equation, we formulate a generalized Gouy-Chapman theory for the case when an electrolyte solution is mixed with a polar co-solvent having a large polarizability. We show that an increase of the co-solvent concentration as well as the co-solvent polarizability lead to a significant increase of differential capacitance at sufficiently high surface potentials of the electrode, whereas the profile of the electrostatic potential becomes considerably more long-ranged. On the contrary, an increase in the permanent dipole of the co-solvent only weakly affects the differential capacitance.