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Morawski I, Spiegelberg R, Korte S, et al. Combined frequency modulated atomic force microscopy and scanning tunneling microscopy detection for multi-tip scanning probe microscopy applications. Rev Sci Instrum. 2015;86(12):123703doi: 10.1063/1.4936975.
Morawski, I., Spiegelberg, R., Korte, S., & Voigtländer, B. (2015). Combined frequency modulated atomic force microscopy and scanning tunneling microscopy detection for multi-tip scanning probe microscopy applications. The Review of scientific instruments, 86(12), 123703. https://doi.org/10.1063/1.4936975
Morawski, Ireneusz, et al. "Combined frequency modulated atomic force microscopy and scanning tunneling microscopy detection for multi-tip scanning probe microscopy applications." The Review of scientific instruments vol. 86,12 (2015): 123703. doi: https://doi.org/10.1063/1.4936975
Morawski I, Spiegelberg R, Korte S, Voigtländer B. Combined frequency modulated atomic force microscopy and scanning tunneling microscopy detection for multi-tip scanning probe microscopy applications. Rev Sci Instrum. 2015 Dec;86(12):123703. doi: 10.1063/1.4936975. PMID: 26724038.
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Rev Sci Instrum. 2015 Dec;86(12):123703. doi: 10.1063/1.4936975.

Combined frequency modulated atomic force microscopy and scanning tunneling microscopy detection for multi-tip scanning probe microscopy applications.

The Review of scientific instruments

Ireneusz Morawski, Richard Spiegelberg, Stefan Korte, Bert Voigtländer

Affiliations

  1. Peter Grünberg Institut (PGI-3) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425 Jülich, Germany.

PMID: 26724038 DOI: 10.1063/1.4936975

Abstract

A method which allows scanning tunneling microscopy (STM) tip biasing independent of the sample bias during frequency modulated atomic force microscopy (AFM) operation is presented. The AFM sensor is supplied by an electronic circuit combining both a frequency shift signal and a tunneling current signal by means of an inductive coupling. This solution enables a control of the tip potential independent of the sample potential. Individual tip biasing is specifically important in order to implement multi-tip STM/AFM applications. An extensional quartz sensor (needle sensor) with a conductive tip is applied to record simultaneously topography and conductivity of the sample. The high resonance frequency of the needle sensor (1 MHz) allows scanning of a large area of the surface being investigated in a reasonably short time. A recipe for the amplitude calibration which is based only on the frequency shift signal and does not require the tip being in contact is presented. Additionally, we show spectral measurements of the mechanical vibration noise of the scanning system used in the investigations.

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