PHASE-SEPARATION IN 2-DIMENSIONAL BINARY FLUIDS OF DIFFERENT-SIZED MOLECULES - A MOLECULAR-DYNAMICS STUDY

Phase separation and late-time domain growth in two-dimensional binary fluids of different-sized molecules have been studied by molecular-dy namics simulations. The late-time growth is found to be insensitive to the overall particle fraction of the mixture and with growth exponent s approximately equal to 2/3, which corresponds to the inertial growth regime, with interfacial growth for interconnected domains. The resul t may be explained by the observation that the interfaces for the mixt ures are very broad and fuzzy even at low temperatures.