Frictional effects in atomic force microscopy (AFM) of Langmuir-Blodge
tt films of 1,2-dipalmitoyl-sn-glycero-phosphoglycerol were examined.
Height measurements of the Langmuir layers are strongly influenced by
the orientation of the cantilevers used in AFM relative to the sample.
A simple model is used to describe the frictional effects and to calc
ulate the real height of the monolayers.