Phase transition and crossover behavior of colloidal fluids under confinement

► Vapor-liquid critical properties of a confined colloidal fluid. ► Shift in critical temperature, Tc, under confinement. ► Non-monotonic behavior of Tc with the surface attraction range. ► Monotonic behavior of other critical properties with the surface attraction range. ► Crossover from 3D to 2D occurs at around pore size of 14 molecular diameters.