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ScanAsyst v. TappingMode

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Top 10 Contributor
143 Posts
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Bruker Employee
BrukerApplications posted on Mon, Jan 11 2010 7:24 PM

In showing the scan asyst versus tapping I don't understand how scan asyst doesn't have the same problem of the material sticking to the tip that it has in tapping mode.

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Top 500 Contributor
1 Posts
Points 10
Bruker Employee
Suggested by Bede Pittenger

In Peak Force Tapping, the modulation or drive amplitude is large enough to dislodge a sticking cantilever duing every cycle.  Also, the period of the modulation is much longer, which allows time for a major part of the sticking response (ringing) to die away before making contact again.  These two differences do not make Peak Force Tapping independent of sticking but afford it a much larger range of acceptable operation than ordinary tapping.

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