Atomic Force Microscopy on Biological Materials Related to Pathological Conditions
(a) Force-distance curves. Interaction forces versus distance between the tip and the sample’s surface. (b) The Lennard–Jones potential. If , the resultant force is attractive, and if , the resultant force is repulsive. In the case that d = deq, the resultant force is zero. (c) Repulsive and attractive forces on the tip. Forces applied on the AFM tip in three different regions.