The interceluster organization of a two-dimensional colloidal system undergoing diffusion-limited cluster-cluster aggregation is considered. During this process the system evolves into a stationary, scaling state. In this state the organization arises from effective intercluster repulsion due to the mutually exclusive depletion zones surrounding each cluster. It is shown that in the scaling regime the relevant size of the depletion zones is determined by the separation between clusters, rather than the cluster size.
PACS 64.60.CnOrder-disorder and statistical mechanics of model systems
PACS 64.75Solubility, segregation and mixing
PACS 05.40Fluctuation phenomena, random processes and Brownian motion
PACs 01.30.CcConference proceedings
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