AFM modes

AFM, atomic force microscopy
Contact AFM
Non-contact AFM
Dynamic contact AFM
Tapping AFM

C-AFM, conductive atomic force microscopy
EFM, electrostatic force microscopy
Friction AFM
FMM, force modulation microscopy
KPFM, kelvin probe force microscopy
MFM, magnetic force microscopy
PFM, Piezoresponse Force Microscopy
SCM, scanning capacitance microscopy
SSRM, scanning spreading resistance microscopy
STM, scanning tunneling microscopy

Examples of AFM different materials

2D materials, Graphene
thin films
fibers
nanoparticles/nanodomains
amorphous solids
polycrystals
single crystals
composite materials
biomaterials
polymers
metals
ceramics
magnetic materials
electric materials

Physical/chemical prosesses on nano level

Phase transitions
Local mechanical destroy
Nanolithography
Ferroelectric switching
Charge injection