Long-ranged attraction between disordered heterogeneous surfaces
Soft Condensed Matter
2012-10-30 v1 Chemical Physics
Abstract
Long-ranged attractions across water between two surfaces that are randomly covered with (mobile) positive and negative charge domains have been attributed to induced correlation of the charges (positive lining up with negative) as the surfaces approach. Here we show, by directly measuring normal forces under a rapid shear field, that these attractions may not in fact be due to such correlations. It is rather the inherent interaction-asymmetry between equally- and between oppositely-charged domains that results in the long-ranged attraction even in the complete absence of any charge correlation.
Keywords
Cite
@article{arxiv.1109.4715,
title = {Long-ranged attraction between disordered heterogeneous surfaces},
author = {Gilad Silbert and Dan Ben-Yaakov and Yael Dror and Susan Perkin and Nir Kampf and Jacob Klein},
journal= {arXiv preprint arXiv:1109.4715},
year = {2012}
}