Dynamical characterization of vibrating AFM cantilevers forced by photothermal excitation

Pini, V., Tiribilli, B., Gambi, C. M. C. and Vassalli, M. (2010) Dynamical characterization of vibrating AFM cantilevers forced by photothermal excitation. Physical Review B, 81, 054302. (doi: 10.1103/PhysRevB.81.054302)

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Abstract

The detailed characterization of the dynamical behavior of an oscillating cantilever is a crucial task in many applications of scanning probe microscopy, force spectroscopy, and cantilever based biosensors. In the present work we considered a direct and localized excitation of the cantilever obtained using the photothermal effect induced by a modulated laser beam that allows us to completely separate the dynamics of the system from spurious effects. We developed a theoretical model able to describe the experimental results with high accuracy; in particular, a good agreement is achieved, both for amplitude and phase, in the presence of resonances and antiresonances, depending on the different location of the excitation beam.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vassalli, Dr Massimo
Authors: Pini, V., Tiribilli, B., Gambi, C. M. C., and Vassalli, M.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Physical Review B
Publisher:American Physical Society
ISSN:1098-0121
ISSN (Online):1550-235X
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