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At the force-distance mode, I expected the dirve voltage for Z-piezo is a triangular wave.But it is not. Its frequency spectrum has a peak at 50khz.
Is this due to noise? If so, what is the solution for the problem?
The AFM I use is Mutilmode with Scanner E.
Fei Lu,
Could you describe in a bit more detail what exactly your setup is, i.e. what are you doing and how are you monitoring it?
Thanks,
Stefan
Hi Stefan,
I am reading the drive voltage for z piezo (Z_ Low voltage ) via Signal Access Module. The data is sent to analog input 1 of Nanoscope V.
The data is saved by High Speed Data Capture.
I am interested in checking the drift of piezo while doing ramping. That is why I am monitoring the drive voltage for z piezo (Low voltage).
Since it is ramping at speed less than 1 nm/s, the drift of piezo can be significant. How can the drift be suppressed ? And also why is there a peak at the power spectrum of z piezo drive voltage (LV)?
Thanks for your help. If more details are required, just let me know.
Best,
Fei