▎ 摘　　要

Graphene and molybdenum disulfide (MoS2) are promising solid lubricants to deal with the interfacial friction and adhesion concerns in silver nanowires (Ag NWs)-based nanodevices, but their difference in friction performance is seldom considered. Here, the difference in friction performance between graphene and MoS2 has been comparatively studied by manipulating the Ag NWs on graphene and MoS2 surfaces through atomic force microscopy (AFM) tip-on-side and tip-on-top manipulations. The tip-on-side and tip-on-top manipulations demonstrate the atomically thin MoS2 has better friction performance than graphene. The tip-on-top manipulation further shows the shear strength in NW-MoS2 interface is smaller than in NW-graphene interface. The underlying mechanism for the friction difference between the two interfaces is attributed to the different interfacial adhesion interactions. The relatively small adhesion interaction in NW-MoS2 interface leads to a small interfacial shear strength, resulting in a small friction when the NW slides on MoS2 surface. The measured water contact angles, calculated work of adhesion and the adhesion force directly measured by AFM tip confirm the relatively small adhesion interaction in NW-MoS2 interface. These findings suggest that MoS2 may be more appropriate as lubricants for application in the NW-based nanodevices.