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
 

Dissipation

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A force versus distance curve (Naval Research Laboratory, Washington, DC)

In an FFM experiment, it is quite easy to compute the amount of dissipated energy. The energy which is needed to move the tip over a distance ds is given as dW=F ds where F is the Friction force. The amount of dissipated energy is hence given by the area of the friction hysteresis during one friction loop.

It is easy to understand, that the amount of didssipated energy is highly dependent on the applied normal force. This can be seen in the Figure.

 
  Calibration                  Self assessment

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