Aggregation kinetics in a model colloidal suspension

Details Aggregation kinetics in a model colloidal suspension Aggregation kinetics in a model colloidal suspension

2006-01-19

arxiv.org/abs/cond-mat/0601452v1

Physical Review Letters 96, 028305 (2006)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevLett.96.028305

We present molecular dynamics simulations of aggregation kinetics in a colloidal suspension modeled as a highly asymmetric binary mixture. Starting from a configuration with largely uncorrelated colloidal particles the system relaxes by coagulation-fragmentation dynamics to a structured state of low-dimensionality clusters with an exponential size distribution. The results show that short-range repulsive interactions alone can give rise to so-called cluster phases. For the present model and probably other, more common colloids, the observed clusters appear to be equilibrium phase fluctuations induced by the entropic inter-colloidal attractions.

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