Active damping by Q-control for fast force-distance curve measurements in atomic force microscopy

This paper investigates the benefit of active damping by an analog Q-control circuit for measuring fast force-distance curves in atomic force microscopy. By active damping of the cantilever oscillation after snap-off, the down-ring time-constant is reduced significantly from 385 μs to 23 μs. Experim...

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Bibliographic Details
Published inReview of scientific instruments Vol. 88; no. 12; p. 123711
Main Authors Kohl, D, Kerschner, C, Schitter, G
Format Journal Article
LanguageEnglish
Published United States 01.12.2017
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Summary:This paper investigates the benefit of active damping by an analog Q-control circuit for measuring fast force-distance curves in atomic force microscopy. By active damping of the cantilever oscillation after snap-off, the down-ring time-constant is reduced significantly from 385 μs to 23 μs. Experimental results demonstrate that the number of force-distance curves per second can be increased by a factor of more than 30.
ISSN:1089-7623
DOI:10.1063/1.4991604