H 2 S-free Metal-Organic Vapor Phase Epitaxy of Coalesced 2D WS 2 Layers on Sapphire - ERRATUM

Abstract

Molecular dynamics (MD) simulations are carried out to investigate the interfacial sliding dynamics of a ZnO piezoelectric nanogenerator in an atomic force microscope (AFM) setting. The molecular system includes a vertically aligned ZnO nanowire along the [0001] direction and a Pt (111) metal tip sliding over it. We calculate the piezoelectric potential distributions based on the equilibrium molecular configurations using classical ionic charges. Simulation results reveal the very detailed evolution changes of the piezopotential within the nanowire, which are largely contributed from the different internal tensile or compressive strains induced by mechanical bending of the ZnO nanowire. Variations of the normal contact and lateral frictional forces versus the sliding distance of the