Abstract
We report computer simulations in the Grand canonical ensemble of a system of several alkanes between two solid surfaces. We computed the solvation force exerted by the fluid on the plates. The solvation force for linear decane oscillates with distance with a periodicity close to the width of the molecules. The branched alkanes (2-methylundecane and 2-methylheptane) show a similar oscillatory behavior, however the oscillations are decreased and are shifted to the attractive regime. In addition, we computed the liquid-vapour equilibria by using Gibbs ensemble Monte-Carlo simulations of n-pentane confined in a slit of 9, 13, 17 Å. The critical temperature of the liquid-vapour coexistence shifts to lower temperatures upon confining. At a plate separation of 5 Å, no liquid-vapour equilibrium is found.
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