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In recent years, the motion of nanodroplets on energy gradient surface on a microscale has attracted widespread attention, however, experimental studies are still irrealizable. In this work, the motions of nanodroplets driven by the energy gradient on surfaces with different microstructures are studied by molecular dynamics method. The results show that: the groove-shaped and post-shaped microstructures can remarkably enhance the motion efficiency of the nanodroplets, while the nail-shapeddoi:10.7498/aps.64.064703 fatcat:5xreknvj5fd3zh4k3hds55a6ba