Anomalous interactions in confined charge-stabilized colloid
Abstract
Charge-stabilized colloidal spheres dispersed in weak 1:1 electrolytes are supposed to repel each other. Consequently, experimental evidence for anomalous long-ranged like-charged attractions induced by geometric confinement inspired a burst of activity. This has largely subsided because of nagging doubts regarding the experiments' reliability and interpretation. We describe a new class of thermodynamically self-consistent colloidal interaction measurements that confirm the appearance of pairwise attractions among colloidal spheres confined by one or two bounding walls. In addition to supporting previous claims for this as-yet unexplained effect, these measurements also cast new light on its mechanism.
Cite
@article{arxiv.cond-mat/0404284,
title = {Anomalous interactions in confined charge-stabilized colloid},
author = {David G. Grier and Yilong Han},
journal= {arXiv preprint arXiv:cond-mat/0404284},
year = {2009}
}
Comments
8 pages, 5 figures, RevTeX4. Conference proceedings for CODEF-04, Colloidal Dispersions in External Fields, March 29 - April 1, 2004