The impact range for smooth wall-liquid interactions in nanoconfined liquids

摘要

Bulk and nanoconfined liquids have initially very different physics; forinstance, nanoconfined liquids show stratification and position-dependentrelaxation processes. A number of similarities between bulk and nanoconfinedliquids have nevertheless been reported in computer simulations during the lastdecade. Inspired by these observations, we present results from moleculardynamics computer simulations of three nanoconfined liquids (i.e.,single-component Lennard-Jones (LJ) liquid, Kob-Andersen binary LJ mixture, andan asymmetric dumbbell model) demonstrating also a microscopic similaritybetween bulk and nanoconfined liquids. The results show that the interactionrange for the wall-liquid and liquid-liquid interactions of the nanoconfinedliquid are identical to the bulk liquid as long as the liquid remains "Roskildesimple" in nanoconfinement, i.e., the liquid has strong correlations betweenvirial and potential energy equilibrium fluctuations in the NVT ensemble.