Wrong tip amplitude information

[andreanderson1]

Approach curve to get the correct amplitude. With 70 mV, it was showing 86 nm, but, after the measurement and the fitting, it showed 490 nm. The voltage was set to 45 mV, the procedure was repeated and the amplitude stayed at 92 nm. ​

CONSEQUENCES OBSERVED

The tip was excavating the Au substrate due to being badly calibrated...​

The suggested procedure should be to set a low voltage, ~10-15 mV, tune the tip, approach and make an approach curve to get the correct amplitude by fitting the M1A signal. Then, adjust the voltage to reach 80 – 100 nm height.​

Conditions adjusted at the tuning tip frequency to an amplitude of 85 nm.

[franciscocbmaia]

On October 20-23, it was performed the study https://cnpemcamp.sharepoint.com/:b:/s/IMBUIABeamline/EV2y2fz4zqdHiht9q_G1jasBuw9AmjaMmU_E7PcV0ivU1g?e=QiRHjH which shows that the tip amplitude is changing as a function of time. This issue was reported to the Neaspec team by email on October 23.
The topography heigh from AFM measurements was found well calibrated.