The use of an active quality-factor control device has been demonstrated to increase the scanning rate of a shear force microscope by lowering the quality factor of the oscillating probe. Shear force microscopy (often used in combination with scanning near-field optical microscopy) requires slow scanning rates due to the long time constant of the oscillating element (optical fiber or tuning fork). By electronically reducing the quality factor of the probe, it was possible to tune the time constant and correspondingly reduce the overall scanning time by a factor of 4. It was also seen that probes with high quality factors could manifest an unstable behavior; by reducing the quality factor of the probe, it was possible to increase the signal-to-noise ratio and so improve the imaging resolution. Deoxyribonucleic acid molecules deposited onto mica and imaged in air were used to demonstrate the technique.
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28 April 2003
Research Article|
April 28 2003
Increasing shear force microscopy scanning rate using active quality-factor control
M. Antognozzi;
M. Antognozzi
Medizinische Hochschule Hannover, Molekular- und Zellphysiologie, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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M. D. Szczelkun;
M. D. Szczelkun
Department of Biochemistry, School of Medical Sciences, University of Bristol, University Walk, Bristol, BS8 1TD, United Kingdom
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A. D. L. Humphris;
A. D. L. Humphris
H.H. Wills Physics Laboratory, Department of Physics, University of Bristol, Tyndall Avenue, BS8 1TL, Bristol, United Kingdom
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M. J. Miles
M. J. Miles
H.H. Wills Physics Laboratory, Department of Physics, University of Bristol, Tyndall Avenue, BS8 1TL, Bristol, United Kingdom
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M. Antognozzi
M. D. Szczelkun
A. D. L. Humphris
M. J. Miles
Medizinische Hochschule Hannover, Molekular- und Zellphysiologie, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
Appl. Phys. Lett. 82, 2761–2763 (2003)
Article history
Received:
January 02 2003
Accepted:
March 06 2003
Citation
M. Antognozzi, M. D. Szczelkun, A. D. L. Humphris, M. J. Miles; Increasing shear force microscopy scanning rate using active quality-factor control. Appl. Phys. Lett. 28 April 2003; 82 (17): 2761–2763. https://doi.org/10.1063/1.1571233
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