Talks and Poster Presentations (with Proceedings-Entry):
D. Kohl, C. Kerschner, P. Mesquida, G. Schitter:
"Increasing the SNR of Electrical AFM Methods by Active Mechanical Q-control";
Talk: Joint Conference 8th IFAC Symposium on Mechatronic Systems (MECHATRONICS 2019), and 11th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2019),
Wien;
09-04-2019
- 09-06-2019; in: "Proceedings of the Joint Conference 8th IFAC Symposium on Mechatronic Systems (MECHATRONICS 2019), and 11th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2019)",
IFAC-PapersOnLine/Elsevier,
52/15
(2019),
6 pages.
English abstract:
This paper investigates the benefit of active mechanical Q-control for electrical surface potential measurements in atomic force microscopy. The effective quality-factor of the electrically stimulated cantilever oscillation is additionally increased mechanically at the same frequency with an active analog Q-controller, while in lift-mode. It is shown experimentally that the cantilever oscillation amplitude and therefore the measurement sensitivity is improved by a factor of 15. By spectral noise analysis around the resonance frequency of the cantilever, an increase of the signal-to-noise ratio from 2.5dB to 23dB is achieved.
Keywords:
AFM, electric measurement modes, Q-control, SNR
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.ifacol.2019.11.692
Created from the Publication Database of the Vienna University of Technology.