Structure factors from cluster-cluster aggregation simulation at high concentration

M.D. Haw, W.C.K. Poon and P.N. Pusey

Physica A: Statistical Mechanics and its Applications, 1994, vol. 208, issue 1, 8-17

Abstract: Aggregation of particles in two dimensions at high concentration is simulated using the diffusion-limited cluster-cluster aggregation model. Static structure factors are calculated from particle configurations. A simple model in which clusters diffuse at rates inversely proportional to their radii of gyration reproduces qualitatively the behaviour observed in experiments. A peak in the structure factor S(Q) is observed at small scattering vectors Q. The intensity of the peak increases, and its Q-value decreases, as the aggregation proceeds. Finally all particles belong to a single system-spanning cluster, the ‘gel’ state, and the scattering peak is ‘frozen’ at a given Q. The gel structure is formed from a random close-packed collection of smaller, ramified clusters.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:208:y:1994:i:1:p:8-17

DOI: 10.1016/0378-4371(94)90529-0

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