Nanomachining of multilayer graphene using an atomic force microscope
  An atomic force microscope is used to structure a film of multilayer graphene. The resistance of the sample was measured in-situ during nanomachining a narrow trench. We found a reversible behavior in the electrical resistance which we attribute to the movement of dislocations. After several attempts also permanent changes are observed. Two theoretical approaches are presented to approximate the measured resistance. 
P. Barthold, T. Luedtke, and R. J. Haug