Electrostatic Disorder-Induced Interactions in Inhomogeneous Dielectrics

Details Electrostatic Disorder-Induced Interactions in Inhomogeneous Dielectrics Electrostatic Disorder-Induced Interactions in Inhomogeneous Dielectrics

2006-01-05

arxiv.org/abs/cond-mat/0601091v1

Europhys. Lett. 74, 712 (2006)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 2 figures

Scientific paper

10.1209/epl/i2006-10019-7

We investigate the effect of quenched surface charge disorder on electrostatic interactions between two charged surfaces in the presence of dielectric inhomogeneities and added salt. We show that in the linear weak-coupling regime (i.e., by including mean-field and Gaussian-fluctuations contributions), the image-charge effects lead to a non-zero disorder-induced interaction free energy between two surfaces of equal mean charge that can be repulsive or attractive depending on the dielectric mismatch across the bounding surfaces and the exact location of the disordered charge distribution.

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