Force Imaging
Force Calibration Mode
180
MultiMode SPM Instruction Manual
Rev. B
11.2.1 Example Force Plot
Figure 11.2c
Tip-Sample Interaction During a Force Plot
Let’s begin with the simplest of SPM force plots: a contact AFM force plot using a silicon nitride
tip. Because of the lower spring constant of silicon nitride probes, they are more sensitive to
attractive and repulsive forces. A force plot in contact AFM is shown below (see also
compares portions of the force curve shown in
tip and sample at seven points. The force curve represents the de
fl
ection signal for each complete
extension-retraction cycle of the piezo (
). The
Z scan rate
parameter in the
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