THE LIQUID-LIQUID INTERFACE OF SIMPLE LIQUIDS

Molecular-dynamics simulations of liquid-liquid interface at low tempe ratures between two simple liquids reveal that the interface is a shee t of vacuum between liquid slabs. Density profiles, order parameters, the pressure dependence of the gap, and the dynamics of liquid slabs, are reported. The Fowler approximation for interfacial tension gamma b etween immiscible liquids is formulated. Contributions to gamma = gamm a(aa) + gamma(ab) + gamma(bb) are also reported. (C) 1995 American Ins titute of Physics.