Introduction Tomlinson Movie Macroscopic Friction The law of Leonardo (da Vinci) The law of Euler and Amontons The law of Coulomb Historical abstract Asperities Adhesion models Friction Force Microscopy Principle of measuring Measuring Topology Measuring Friction Both Channels Calibration Dissipation Self assessment Tomlinson's mechanism Phenomenology I Phenomenology II Mechanical adiabaticity Distinguish positions Playing Tomlinson Friction - a pinning problem 2D Friction Critical Curves Historical Background Research Projects Simulator Applet The first Picture The Panels Parameters Post processing Statistics Glossary Textbook

## Measuring Topology

 Top down motion of the lever gives information on the topology of the sample.

The cantilever can be bended in two ways:

• longitudinal deflection gives information about the topology of the sample
• torsion of the lever gives information on friction between the tip and the sample

The longitudinal deflection is caused by the different force as a function of the distance between tip and sample. It measures therefore mainly the topology of the sample.

Principle of measuring                  Measuring Friction