Tuning colloid-interface interactions by salt partitioning
Soft Condensed Matter
2016-08-25 v2 Statistical Mechanics
Chemical Physics
Abstract
We show that the interaction of an oil-dispersed colloidal particle with an oil-water interface is highly tunable from attractive to repulsive, either by varying the sign of the colloidal charge via charge regulation, or by varying the difference in hydrophilicity between the dissolved cations and anions. In addition, we investigate the yet unexplored interplay between the self-regulated colloidal surface charge distribution with the planar double layer across the oil-water interface and the spherical one around the colloid. Our findings explain recent experiments and have direct relevance for tunable Pickering emulsions.
Cite
@article{arxiv.1603.08703,
title = {Tuning colloid-interface interactions by salt partitioning},
author = {Jeffrey Everts and Sela Samin and René van Roij},
journal= {arXiv preprint arXiv:1603.08703},
year = {2016}
}
Comments
5+4 pages, 3+4 figures, V2: improved text and figures, more detailed supplementary