TY  - JOUR
AU  - Meszaros, G.
AU  - Li, C.
AU  - Pobelov, I.
AU  - Wandlowski, Th.
TI  - Current Measurements in a wide Dynamic range - Applications to Electrochemical Nanotechnology
JO  - Nanotechnology
VL  - 18
SN  - 0957-4484
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-58666
SP  - 424004
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - Current measurements in a wide dynamic range from low picoamperes up to a few milliamperes are usually carried by implementing logarithmic current-to-voltage converter circuits. Conductance studies in nanoscale metal | molecule | metal junctions require measurements with a high dynamic range, good accuracy and reasonable speed simultaneously. In this work we propose two novel circuit solutions which comply with these conditions: one is based on a high-accuracy, fine-tunable logarithmic current-to-voltage converter. Another circuit implements a double-output (or multiple-output) linear current-to-voltage converter, for which the problem of range-switching has been circumvented. Both circuits were applied in constructing a low-current bipotentiostat dedicated to the electrochemical formation of molecular-scale gaps, and a novel scanning tunnelling microscope preamplifier stage for current-distance spectroscopy studies.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21730437
UR  - <Go to ISI:>//WOS:000249735800005
DO  - DOI:10.1088/0957-4484/18/42/424004
UR  - https://juser.fz-juelich.de/record/58666
ER  -