Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
D. Kohl, C. Kerschner, P. Mesquida, G. Schitter:
"Increasing the SNR of Electrical AFM Methods by Active Mechanical Q-control";
Vortrag: Joint Conference 8th IFAC Symposium on Mechatronic Systems (MECHATRONICS 2019), and 11th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2019),
Wien;
04.09.2019
- 06.09.2019; 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 S.
Kurzfassung englisch:
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.
Schlagworte:
AFM, electric measurement modes, Q-control, SNR
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.ifacol.2019.11.692
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.