Ara research AFM is capable of recording the tensional rotation of the cantilever while scanning sample surface. the output of these data makes LFM image which shows the frictional properties of the sample. the principle is schematically shown as follows :
LFM images are shown in the following pictures; the left images is L-R Bwd and the right one L-R Fwd. the light areas on the left image (the dark ones on the right image) show a material with higher surface friction.
A Topo images of the same sample is shown in the following image.