Abstract

We have studied the influence of the surface charge density of polymer colloids on aggregation processes induced at a high salt concentration. In this way, the effect of the residual interaction between the particles on the aggregation mechanism was studied. The time dependence of the detailed cluster-size distribution and the time-independent scaling distribution were obtained by single particle light scattering. We found a change in the aggregation mechanism, expressed as a variation of the μ exponent value, when the surface charge is modified.Key wordsColloidal aggregationdynamic scalingfractal structuresingle particle detectionlight scattering

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