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

Douwe Jan Bonthuis; Yuki Uematsu; Roland R. Netz

doi:10.1098/rsta.2015.0033

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

Douwe Jan Bonthuis, Yuki Uematsu, Roland R. Netz

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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 doublelayer 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.

Original language	English
Article number	20150033
Journal	Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume	374
Issue number	2060
DOIs	https://doi.org/10.1098/rsta.2015.0033
Publication status	Published - Feb 13 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Mathematics(all)
Engineering(all)
Physics and Astronomy(all)

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10.1098/rsta.2015.0033

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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 doublelayer 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-H{\"u}ckel approximation are derived and shown to describe experimental surface capacitance and electro-osmotic data in a unified framework.",

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AU - Uematsu, Yuki

AU - Netz, Roland R.

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N2 - Many properties of the interfacial layer of water at surfaces differ significantly from those of bulk water. The consequences are most significant for the doublelayer 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.

AB - Many properties of the interfacial layer of water at surfaces differ significantly from those of bulk water. The consequences are most significant for the doublelayer 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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Interfacial layer effects on surface capacitances and electro-osmosis in electrolytes

Abstract

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