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Electron transfer through interfacial water layer studied by scanning tunneling microscopy

  • Y. A. Hong
  • , J. R. Hahn
  • , H. Kang*
  • *Corresponding author for this work
  • Pohang University of Science and Technology

Research output: Contribution to journalJournal articlepeer-review

Abstract

The effective barrier height for electron tunneling is measured across the aqueous capacitor junction composed of a scanning tunneling microscopy (STM) tip and a surface. At a junction distance of a water monolayer, the barrier height strongly varies with the polarity and the magnitude of the applied junction voltage. This monolayer barrier height increases with an increasing positive value of the sample bias, while it does not for the negative bias. Such asymmetric variation of the tunneling barrier height manifests the influence of water molecular geometry on electron tunneling.

Original languageEnglish
Pages (from-to)4367-4370
Number of pages4
JournalJournal of Chemical Physics
Volume108
Issue number11
DOIs
StatePublished - 1998.03.15

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