Document Detail


Force-gradient-induced mechanical dissipation of quartz tuning fork force sensors used in atomic force microscopy.
MedLine Citation:
PMID:  21333855     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We have studied the dynamics of quartz tuning fork resonators used in atomic force microscopy taking into account the mechanical energy dissipation through the attachment of the tuning fork base. We find that the tuning fork resonator quality factor changes even in the case of a purely elastic sensor-sample interaction. This is due to the effective mechanical imbalance of the tuning fork prongs induced by the sensor-sample force gradient, which in turn has an impact on dissipation through the attachment of the resonator base. This effect may yield a measured dissipation signal that can be different from the one exclusively related to the dissipation between the sensor and the sample. We also find that there is a second-order term in addition to the linear relationship between the sensor-sample force gradient and the resonance frequency shift of the tuning fork that is significant even for force gradients usually present in atomic force microscopy, which are in the range of tens of N/m.
Authors:
A Castellanos-Gomez; N Agraït; G Rubio-Bollinger
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Publication Detail:
Type:  Journal Article     Date:  2010-11-30
Journal Detail:
Title:  Ultramicroscopy     Volume:  111     ISSN:  1879-2723     ISO Abbreviation:  Ultramicroscopy     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7513702     Medline TA:  Ultramicroscopy     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  186-90     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Affiliation:
Departamento de Física de la Materia Condensada (C-III), Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain.
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