Dynamic behaviour of tuning fork shear-force feedback

Share/Save/Bookmark

Ruiter, A.G.T. and Veerman, J.A. and Werf van der, K.O. and Hulst van, N.F. (1997) Dynamic behaviour of tuning fork shear-force feedback. Applied Physics Letters, 71 (1). pp. 28-30. ISSN 0003-6951

[img]
Preview
PDF
407Kb
Abstract:The dynamics of a tuning fork shear-force feedback system, used in a near-field scanning optical microscope, have been investigated, Experiments, measuring amplitude and phase of the tuning fork oscillation as a function of driving frequency and tip-sample distance, reveal that the resonance frequency of the tuning fork changes upon approaching the sample. Either amplitude or phase of the tuning fork can be used as distance control parameter in the feedback system. Using amplitude a second-order behavior is observed while with phase o­nly a first-order behavior is observed, and confirmed by numerical calculations. This first-order behavior results in an improved stability of our feedback system, A sample consisting of DNA strands o­n mica was imaged which showed a height of the DNA of 1.4 nm
Item Type:Article
Copyright:© 1997 American Institute of Physics
Research Group:
Link to this item:http://purl.utwente.nl/publications/23811
Official URL:http://dx.doi.org/10.1063/1.119482
Publisher URL:http://link.aip.org/link/?APPLAB/71/28/1
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 128610