Equilibration of fluid-phase coexistence in polydisperse particle systems with short- and moderate-range depletion attractions

摘要: Abstract Gibbs ensemble Monte Carlo (GEMC) simulations have been done on polydisperse systems of particles interacting via the Asakura–Oosawa depletion potential. On restricting range attraction aggregate forming long-lived, unequilibrated structures and it becomes increasingly difficult to sample phase space. It is found that by simply equilibrating sequentially starting at longer ranges attraction, equilibrium fluid–fluid coexistence can be determined down polymer-colloid size ratios approaching 10%. For such short interaction obtain reliable estimates chemical potentials due occasional particle insertions resulting in very low energies. The results show full not reached a ratio 10% spite lengthy persistent dense-fluid dominated belonging larger fraction. Free-volume theory with colloid component, modeled as three-component mixture, used for qualitative comparison some computer simulations.