Volume 57, Number 6, March 2002
|Page(s)||911 - 917|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 August 2002|
Counterions at charge-modulated substrates
Max-Planck-Institut für Kolloid-
und Grenzflächenforschung 14424 Potsdam, Germany
2 Materials Research Laboratory, UCSB - Santa Barbara, CA 93106, USA
3 Sektion Physik, LMU - Theresienstr. 37, 80333 München, Germany
Accepted: 21 December 2001
We consider counterions in the presence of a single planar surface with a spatially inhomogeneous charge distribution using Monte Carlo simulations and strong-coupling theory. For high surface charges, multivalent counterions, or pronounced substrate charge modulation the counterions are laterally correlated with the surface charges and their density profile deviates strongly from the limit of a smeared-out substrate charge distribution, in particular exhibiting a much increased laterally averaged density at the surface.
PACS: 82.70.-y – Disperse systems; complex fluids / 61.20.Qg – Structure of associated liquids: electrolytes, molten salts, etc / 82.45.-h – Electrochemistry and electrophoresis
© EDP Sciences, 2002
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