We performed molecular dynamics simulations of argon liquid enclosed in an infinitely extended channel made out of platinum atoms. It was found that for small temperatures the van der Waals forces at the liquid-substrate interface are increased. Using this fact and the nature of argon, that this liquid thermally contracts if cooled, phase transition of liquid to vapor could also be achieved in this nanocavity of constant volume. However, the phase diagram is altered significantly compared to bulk argon.

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