Partial Clustering in Binary Two-Dimensional Colloidal Suspensions

Details Partial Clustering in Binary Two-Dimensional Colloidal Suspensions Partial Clustering in Binary Two-Dimensional Colloidal Suspensions

2006-04-13

arxiv.org/abs/cond-mat/0604350v1

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 5 figures, submitted 2006

Scientific paper

10.1103/PhysRevLett.97.078301

Strongly interacting binary mixtures of superparamagnetic colloidal particles confined to a two-dimensional water-air interface are examined by theory, computer simulation and experiment. The mixture exhibits a partial clustering in equilibrium: in the voids of the matrix of unclustered big particles, the small particles form subclusters with a sponge-like topology which is accompanied by a characteristic small-wave vector peak in the small-small structure factor. This partial clustering is a general phenomenon occurring for strongly coupled negatively non-additive mixtures.

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