OSTWALD RIPENING ON A SUBSTRATE - MODELING LOCAL INTERPARTICLE DIFFUSION

A model with local interparticle diffusion is considered, in contrast with the classical model of Ostwald ripening (the mean field model) an d its multiparticle extensions which have long range interactions. Sim ulations of the evolution of the system show that the asymptotic behav ior obeys a power law. It is also found that the scaled asymptotic dis tribution of particle radii is broader than in the previous models, ev en at low initial coverage where the multiparticle models have the sam e narrow scaled distribution as the mean field model. The scaling prop erties are independent of the initial particle size distribution.