Cluster aggregation under diffusion

Cluster aggregation limited by cluster diffusion is one of the possible pathways leading to aggregation phenomena as different as phase separation or colloidal gelation. The imprinting of the irreversible diffusion-limited aggregation is observable in the evolution of the scattered intensity I(q,t) and in its dynamical scaling relations. We discuss a recent model for describing the evolution of the scattered intensity both for growing eucledean and fractal clusters.