title: Fast electron-transfer kinetics probed in nanofluidic channels.
abstract: 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 solid-state devices are mechanically robust and stable over time and therefore have the potential to become a widespread and versatile tool for electrochemical measurements.
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors.forename: Marcel A G
authors.initials: MA
authors.lastname: Zevenbergen
authors.forename: Bernhard L
authors.initials: BL
authors.lastname: Wolfrum
authors.forename: Edgar D
authors.initials: ED
authors.lastname: Goluch
authors.forename: Pradyumna S
authors.initials: PS
authors.lastname: Singh
authors.forename: Serge G
authors.initials: SG
authors.lastname: Lemay