Colloidal Electrostatic Interactions Near a Conducting Surface
Soft Condensed Matter
2009-11-11 v1 Statistical Mechanics
Abstract
Charge-stabilized colloidal spheres dispersed in deionized water are supposed to repel each other. Instead, artifact-corrected video microscopy measurements reveal an anomalous long-ranged like-charge attraction in the interparticle pair potential when the spheres are confined to a layer by even a single charged glass surface. These attractions can be masked by electrostatic repulsions at low ionic strengths. Coating the bounding surfaces with a conducting gold layer suppresses the attraction. These observations suggest a possible mechanism for confinement-induced attractions.
Cite
@article{arxiv.cond-mat/0605058,
title = {Colloidal Electrostatic Interactions Near a Conducting Surface},
author = {Marco Polin and David G. Grier and Yilong Han},
journal= {arXiv preprint arXiv:cond-mat/0605058},
year = {2009}
}
Comments
4 pages, 2 figures