I am trying to make sense of some notes given to me by my lecturer; he is not responding and exam is soon! The question is 1) name 3 types of interaction measured in AFM 2) name 3 types of interaction forces that are measured in AFM 3) how are the forces measured? The notes say: Interaction type (some stats relevant to each one) Ion/Ion Ion/Dipole Ion/Dipole Chemical bonds Covalent/Ionic Hydrogen Van de Waals Typical forces Covalent bonds Hydrogen bonds Van de Waals Layer forces Miniskus forces So the various interactions are ion/ion ion/dipole dipole/dipole? The forces are any of those labelled under typical forces? How does the AFM tip interact with the surface? Sorry massive list of questions.