title: Interfacial layer effects on surface capacitances and electro-osmosis in electrolytes.
abstract: Many properties of the interfacial layer of water at surfaces differ significantly from those of bulk water. The consequences are most significant for the double-layer capacitance and the electrokinetic properties. We model the interfacial hydration layer by a modified dielectric constant and a modified local viscosity over a single interfacial width. Analytic expressions in the low-charge Debye-Hückel approximation are derived and shown to describe experimental surface capacitance and electro-osmotic data in a unified framework.
authors.affiliation: Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, UK.
authors.forename: Douwe Jan
authors.initials: DJ
authors.lastname: Bonthuis
authors.affiliation: Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Uematsu
authors.affiliation: Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany rnetz@physik.fu-berlin.de.
authors.forename: Roland R
authors.initials: RR
authors.lastname: Netz
keywords: aqueous interfaces; capacitance; dielectric tensor; mobility; viscosity tensor