Interpretation of AFM images: the graphite surface with a diamond tip

Abstract

Constant force AFM images of the graphite surface using a diamond tip are calculated from a standard molecular mechanics force field. It is shown that there is no need for an asymmetric tip apex nor for a graphite flake under the apex to reproduce the experimental images. A good orientation of the tip apex and a good choice of the force applied is enough to evolute from a trigonal to a honeycomb AFM apparent surface structure for graphite.