Abstract

Aggregation kinetics and fractal structures of salt-induced fractal aggregates of polystyrene colloid and cationic-surfactant (TPB)-induced fractal silica aggregates have been studied. For polystyrene colloid in the quasi-fast regime of aggregation, the fractal dimensions ( d f) largely deviate from the diffusion limited cluster aggregation (DLCA) value of 1.75. For TPB-induced silica clusters, all the d f values obtained under different regimes of aggregation have essentially the same value 2.10 ± 0.05. The question of restructuring is raised.

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