Electrostatic Disorder-Induced Interactions in Inhomogeneous Dielectrics

Abstract

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.

7 pages, 2 figures

References in corpus (4)

• Statics and Dynamics of Strongly Charged Soft Matter
• Electrostatic Interactions in Strongly-Coupled Soft Matter
• Quenched Charge Disorder and Coulomb Interactions
• Universal reduction of pressure between charged surfaces by long-wavelength surface charge modulation

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