Effective forces between colloids at interfaces induced by capillary wave-like fluctuations
软凝聚态物质
2007-05-23 v2
摘要
We calculate the effective force mediated by thermally excited capillary waves between spherical or disklike colloids trapped at a fluid interface. This Casimir type interaction is shown to depend sensitively on the boundary conditions imposed at the three-phase contact line. For large distances between the colloids an unexpected cancellation of attractive and repulsive contributions is observed leading to a fluctuation force which decays algebraically very rapidly. For small separations the resulting force is rather strong and it may play an important role in two-dimensional colloid aggregation if direct van der Waals forces are weak.
引用
@article{arxiv.cond-mat/0602372,
title = {Effective forces between colloids at interfaces induced by capillary wave-like fluctuations},
author = {H. Lehle and M. Oettel and S. Dietrich},
journal= {arXiv preprint arXiv:cond-mat/0602372},
year = {2007}
}
备注
7 pages, 3 figures, minor revisions, one additional figure