Fractal Structure and Dynamics for Kinetic Cluster Aggregation of Polystyrene Colloids

Abstract

Static and dynamic light scattering measurements are performed on colloidal aggregates of polystyrene uniform latex particles. The light scattering structure factor S(k) is found to exhibit characteristic power-law decay on k which means that the internal structure of the aggregating clusters is self-similar. The dependence of the mean cluster size on time is also found to show scaling behavior. The fractal dimension and dynamic scaling exponent of the aggregating clusters are determined.