Effect of the Debye screening on the tunnel current through simple electrochemical bridged contact

Publication: Research - peer-reviewJournal article – Annual report year: 2008

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General equations for tunnel current through electrochemical contact containing a redox-center in molecular bridge group are observed with allowing for potential distribution in the tunnel gap. Simple approximate expressions appropriate for the analysis of experimental data are also derived. The dependences of the position of the current maximum and its width on the bias voltage, the position of the bridge group in the tunnel gap, and the system's physical parameters (like the electrolyte ionic strength) are calculated. It is shown that the Debye screening in solution affects these dependences significantly.
Original languageEnglish
JournalRussian Journal of Electrochemistry
Publication date2008
Volume44
Issue9
Pages983-991
ISSN1023-1935
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 2

Keywords

  • Debye screening, electrical double layer, tunnel current, scanning tunnel microscopy
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