Contact resonance force microscopy (CR-FM) mapping provides a means of continuously tracking contact stiffness while scanning an AFM tip in contact with a substrate. Because the contact stiffness is a function of contact radius, tip wear leading to changes in contact radius is directly detected in situ. We find that in-situ results agree well with existing ex-situ techniques, while providing additional robust wear information that would not be resolved ex situ. Additionally, we find that CR-FM mapping does not affect the wear mechanism compared to standard contact scanning.
Contact Resonance Force Microscopy, Atomic Force Microscope, Tip Wear, tribology, nanotribology