Interfacial layer effects on surface capacitances and electro-osmosis in electrolytes | Zendy

Douwe Jan Bonthuis | Zendy; Yuki Uematsu | Zendy; Roland R. Netz | Zendy

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Interfacial layer effects on surface capacitances and electro-osmosis in electrolytes

Author(s) -

Douwe Jan Bonthuis,

Yuki Uematsu,

Roland R. Netz

Publication year - 2015

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2015.0033

Subject(s) - electrokinetic phenomena , capacitance , materials science , electrolyte , viscosity , debye length , layer (electronics) , debye , dielectric , surface charge , chemical physics , thermodynamics , composite material , condensed matter physics , chemistry , nanotechnology , physics , ion , optoelectronics , organic chemistry , electrode

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.

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