The role of nonlinear dynamics in quantitative atomic force microscopy
2012 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 23, no 26, 265705- p.Article in journal (Refereed) Published
Various methods of force measurement with the atomic force microscope are compared for their ability to accurately determine the tip-surface force from analysis of the nonlinear cantilever motion. It is explained how intermodulation, or the frequency mixing of multiple drive tones by the nonlinear tip-surface force, can be used to concentrate the nonlinear motion in a narrow band of frequency near the cantilever's fundamental resonance, where accuracy and sensitivity of force measurement are greatest. Two different methods for reconstructing tip-surface forces from intermodulation spectra are explained. The reconstruction of both conservative and dissipative tip-surface interactions from intermodulation spectra are demonstrated on simulated data.
Place, publisher, year, edition, pages
2012. Vol. 23, no 26, 265705- p.
IdentifiersURN: urn:nbn:se:kth:diva-99062DOI: 10.1088/0957-4484/23/26/265705ISI: 000305411400017ScopusID: 2-s2.0-84862638379OAI: oai:DiVA.org:kth-99062DiVA: diva2:541564
FunderSwedish Research Council
QC 201207192012-07-192012-07-132015-02-09Bibliographically approved