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| Citation key | ISI:000439007700055 |
|---|---|
| Author | Harris, Tomos G. A. A. and Heidary, Nina and Kozuch, Jacek and Frielingsdorf, Stefan and Lenz, Oliver and Mroginski, Maria-Andrea and Hildebrandt, Peter and Zebger, Ingo and Fischer, Anna |
| Pages | 23380-23391 |
| Year | 2018 |
| ISSN | 1944-8244 |
| DOI | 10.1021/acsami.8b02273 |
| Address | 1155 16TH ST, NW, WASHINGTON, DC 20036 USA |
| Journal | ACS APPLIED MATERIALS & INTERFACES |
| Volume | 10 |
| Number | 27 |
| Month | JUL 11 |
| Publisher | AMER CHEMICAL SOC |
| Abstract | Surface-enhanced infrared absorption spectroscopy is used in situ to determine the electrochemical stability of organic interfaces deposited onto the surface of nanostructured, thin-film gold electrodes via the electrochemical reduction of diazonium salts. These interfaces are shown to exhibit a wide electrochemical stability window in both acetonitrile and phosphate buffer, far surpassing the stability window of thiol-derived self-assembled monolayers. Using the same in situ technique, the application of radical scavengers during the electrochemical reduction of diazonium salts is shown to moderate interface formation. Consequently, the heterogeneous charge-transfer resistance can be reduced sufficiently to enhance the direct electron transfer between an immobilized redox-active enzyme and the electrode. This was demonstrated for the oxygen-tolerant [NiFe] hydrogenase from the ``Knallgas'' bacterium Ralstonia eutropha by relating its electrochemical activity for hydrogen oxidation to the interface properties. |
| Bibtex Type of Publication | Article |
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