Journal Article

PreJuSER-58666

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Current Measurements in a wide Dynamic range - Applications to Electrochemical Nanotechnology

Meszaros, G.FZJ* ; Li, C.FZJ* ; Pobelov, I.FZJ* ; Wandlowski, T.FZJ*

2007
IOP Publ. Bristol

This record in other databases:    

Please use a persistent id in citations: doi:10.1088/0957-4484/18/42/424004

Abstract: 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.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

---

Contributing Institute(s):

1. Grenz- und Oberflächen (IBN-3)
2. Center of Nanoelectronic Systems for Information Technology (CNI)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2007

---