A Langevin dynamics study of mobile filler particles in phase-separating binary systems


The dynamics of phase separation in a simple binary mixture containing mobile filler particles was analyzed systematically via Langevin simulations in two dimensions. It was shown that while the filler particles reduce the growth rate of spinodal decomposition, the domain growth remains essentially identical to that of the pure binary mixture. It was found that the contribution of the droplets with high filler concentration to domain growth occurs mainly through their Brownian diffusion followed by coalescence with other droplets. The results show that the growth rate diminishes as either the filler particles concentration is increased or their diffusivity is decreased.

Publication Title

Journal of Chemical Physics