Atomic Force Microscopy Adhesion Maps

A schematic of the various data signals involved in mapping adhesion.

x(t) The sample is moved a small distance and held in place for 3 ms.
z(t) While the sample is stationary, the tube is periodically pulled away from the sample and pushed back in about ten times per data point.
F(t) The normal force (on the cantilever) is measured by the photodiode - it is this data which is used to make plots like the ones below.
F(z) Additionally, Force vs. distance can be plotted for desired points.

A thin layer of polymer.

Particles on a flat substrate.

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Last modified Tue Apr 27 10:46:00 1999
Ron Reifenberger