Colloid-Polymer Mixtures Confined Between Asymmetric Walls: Simulation   Evidence for an Interface Localization Transition
  Phase separation of colloid-polymer mixtures, described by the Asakura-Oosawa (AO) model, confined in a thin slit pore is studied by grand-canonical Monte Carlo simulation. While one wall is a hard wall for both particles, at the other wall there acts an additional repulsive potential on the colloids only. Varying the strength of this potential, a crossover from capillary condensation to an interface localization transition is found. The latter occurs under conditions where in the bulk almost complete phase separation has occurred. 
A. De Virgiliis, R.L.C. Vink, J. Horbach, and K. Binder