Reaction Limited Aggregation with Two Species of Monomers

Reaction-limited cluster-cluster aggregation in systems with two types of particles (A and B) has been studied in two and three dimensions using computer simulations. A simple model is used in which bonding can occur between pairs of unlike particles (A-B) but not between like particles (A-A or B-B). For values of the concentration ratio ( f =ρ(A)/(ρ(A)+ρ(B)) which are either too large or too small, the aggregation process cannot proceed indefinitely. The fractal dimension of large clusters is independent of f but the aggregation kinetics is sensitive to f .