Friction force microscope

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A friction force microscope is an atomic force microscope with a four quadrant photodetector, which allows measuring the frictional force acting on the probing tip sliding on a surface from the torsion of the cantilever beam where the tip is attached. Also called Lateral Force Microscopy (LFM). When the tip is modified to bear chemical functionality, chemical force (e.g. hydrophilic - hydrophobic interaction]] operates between the tip and sample. Such mode of operation is called chemical force microscopy (CFM).

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