Fast electron-transfer kinetics probed in nanofluidic channels

Marcel A.G. Zevenbergen, Bernhard L. Wolfrum, Edgar D. Goluch, Pradyumna S. Singh, Serge G. Lemay*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

121 Citations (Scopus)


We demonstrate that a 50 nm high solution-filled cavity bounded by two parallel electrodes in which electrochemically active molecules undergo rapid redox cycling can be used to determine very fast electron-transfer kinetics. We illustrate this capability by showing that the heterogeneous rate constant of Fc(MeOH)2 sensitively depends on the type and concentration of the supporting electrolyte. These solidstate devices are mechanically robust and stable over time and therefore have the potential to become a widespread and versatile tool for electrochemical measurements.

Original languageEnglish
Pages (from-to)11471-11477
Number of pages7
JournalJournal of the American Chemical Society
Issue number32
Publication statusPublished - 19 Aug 2009
Externally publishedYes


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