Surface Mapping of the Dynamic Friction and the Effective Elastic Stiffness of Nanoscale Contact

摘要

We developed a new apparatus which combines a quartz crystal resonator and an optical AFM cantilever. In the present experiments, we carried out the surface mapping of the dynamic friction and the effective elastic stiffness of nanoscale contact for a deposited Au surface on the quartz crystal resonator. The tip was scanned across the surface in the constant-height mode. A typical grain structure of the dynamic friction and the effective elastic stiffness was successfully observed, associated with the topography image. This technique enables us to measure the frictional properties of nanoscale contact as a function of position.