Anisotropic frictional characteristics among MoS2/SiO2 layer-dependent heterojunctions

Abstract

The findings pertaining to the two-dimensional single-layer interface of MoS2 and SiO2 reveal that the matched heterostructure exhibits a prominent frictional anisotropy with a hexagonal six-fold symmetry. Notably, the misaligned and aligned contacts exhibit distinct frictional coefficients of 0.074 and 0.059, respectively. Moreover, as the number of layers increases, the features of frictional anisotropy decline considerably until reaching nine layers. The adaptive nanodevices derived from this research may hold significant potential for application in various heterojunction configurations.