Interface friction between neighbor diamondene nanoribbons: A molecular dynamics study

Due to its unique carbon-carbon bond topology, diamondene exhibits different frictional properties compared to pristine graphene. This study evaluates the friction properties of diamondene ribbon (DR) for potential applications in the design of dynamic nanodevices. For a DR sample on a DR substrate at a specific temperature, it has a maximum static friction force (MSFF) that is about 38 times greater than that of a graphene counterpart with the same size. The rate of MSFF to the contact surface demonstrates the shear strength of a material. As an intrinsic property, the shear strength between DRs measures approximately 3.58 MPa at 10 K, which is much greater than that between graphene ribbons. When the pulling force on the DR sample exceeds MSFF, the sample undergoes a period of acceleration before reaching a stable sliding velocity. The viscous damping coefficient between DRs increases with increasing pulling force on the DR sample while decreasing with increasing temperature. The dynamic friction force behaves in a temperature-dependent manner due to the unstable bond topology of DRs at high temperatures. These studies address previous research lack regarding friction between carbon materials.