TY  - JOUR
AU  - Morawski, I.
AU  - Voigtländer, B.
TI  - Simultaneously measured signals in scanning probe microscopy with a needle sensor: Frequency shift and tunneling current
JO  - Review of scientific instruments
VL  - 81
SN  - 0034-6748
CY  - [S.l.]
PB  - American Institute of Physics
M1  - PreJuSER-10294
SP  - 033703
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:20370181
UR  - <Go to ISI:>//WOS:000276210200029
DO  - DOI:10.1063/1.3321437
UR  - https://juser.fz-juelich.de/record/10294
ER  -