Dynamic force spectroscopy using the frequency modulation technique with constant excitation

H. Hölscher, B. Gotsmann, and A. Schirmeisen
Phys. Rev. B 68, 153401 – Published 20 October 2003
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Abstract

We investigate the measurement principle of a dynamic force microscope utilizing the frequency modulation technique with a constant excitation (CE) mode which has been successfully applied in vacuum, air, and liquids. The basic principles of this mode are comparable with the constant amplitude (CA) mode, but in difference to the CA mode the excitation amplitude is kept constant in the CE mode. Using an theoretical approach we show how the measured quantities of the CE mode — the frequency shift and the oscillation amplitude — are related to the tip-sample interaction force. Based on this analysis we demonstrate how dynamic force spectroscopy experiments can be done also in the CE mode.

  • Received 16 May 2003

DOI:https://doi.org/10.1103/PhysRevB.68.153401

©2003 American Physical Society

Authors & Affiliations

H. Hölscher1,*, B. Gotsmann2, and A. Schirmeisen3

  • 1Center of Advanced European Studies and Research (Caesar), Friedensplatz 16, 53111 Bonn, Germany
  • 2IBM Zurich Research Laboratory, Saeumerstrasse 4, 8803 Rüschlikon, Switzerland
  • 3Institute of Physics, University of Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany

  • *Present address: Institute of Physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany.

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Vol. 68, Iss. 15 — 15 October 2003

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