This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/16758 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.3321437 in citations.
Simultaneously measured signals in scanning probe microscopy with a needle sensor: Frequency shift and tunneling current
Simultaneously measured signals in scanning probe microscopy with a needle sensor: Frequency shift and tunneling current
We present combined noncontact scanning force microscopy and tunneling current images of a platinum(111) surface obtained by means of a 1 MHz quartz needle sensor. The low-frequency circuit of the tunneling current was combined with a high-frequency signal of the quartz resonator enabling full elect...
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Personal Name(s): | Morawski, I. |
---|---|
Voigtländer, B. | |
Contributing Institute: |
Grenz- und Oberflächen; IBN-3 JARA-FIT; JARA-FIT |
Published in: | Review of scientific instruments, 81 (2010) S. 033703 |
Imprint: |
[S.l.]
American Institute of Physics
2010
|
Physical Description: |
033703 |
PubMed ID: |
20370181 |
DOI: |
10.1063/1.3321437 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Review of Scientific Instruments
81 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1063/1.3321437 in citations.
We present combined noncontact scanning force microscopy and tunneling current images of a platinum(111) surface obtained by means of a 1 MHz quartz needle sensor. The low-frequency circuit of the tunneling current was combined with a high-frequency signal of the quartz resonator enabling full electrical operation of the sensor. The frequency shift and the tunneling current were detected simultaneously, while the feedback control loop of the topography signal was fed using one of them. In both cases, the free signal that was not connected to the feedback loop reveals proportional-integral controller errorlike behavior, which is governed by the time derivative of the topography signal. A procedure is proposed for determining the mechanical oscillation amplitude by utilizing the tunneling current also including the average tip-sample work function. |