%0 Journal Article
%A Meszaros, G.
%A Li, C.
%A Pobelov, I.
%A Wandlowski, Th.
%T Current Measurements in a wide Dynamic range - Applications to Electrochemical Nanotechnology
%J Nanotechnology
%V 18
%@ 0957-4484
%C Bristol
%I IOP Publ.
%M PreJuSER-58666
%P 424004
%D 2007
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:21730437
%U <Go to ISI:>//WOS:000249735800005
%R 10.1088/0957-4484/18/42/424004
%U https://juser.fz-juelich.de/record/58666