Riepl, Michael and Mirsky, Vladimir M. and Wolfbeis, Otto S. (1999) Electrical control of alkanethiols self-assembly on a gold surface as an approach for preparation of microelectrode arrays. MIKROCHIMICA ACTA, 131 (1-2). pp. 29-34. ISSN 0026-3672,
Full text not available from this repository.Abstract
It is shown by capacitive monitoring that the self-assembly of alkanethiols on gold electrodes and desorption of these self-assembled monolayers from the electrodes are controlled by the electrode potential. At neutral pH, chemical adsorption of alkanethiols was observed at an electrode potential of +300 mV vs SCE, but only physical adsorption was detected when the electrode potential was -1400 mV vs SCE. At electrode potentials between these values (-300 mV, -600 mV), chemical adsorption of alkanethiols occurred, but the alkanethiol monolayers were not stable in the absence of the alkanethiol in the bulk solution and were desorbed from the gold electrode. The desorption rate was higher at more negative electrode potentials. These results can be used in designing methods for electrically addressable immobilization of different receptors on (micro)electrode arrays. This has been demonstrated by deposition of two different types of alkanethiols onto a two-electrode array.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MONOLAYERS; ELECTRODES; DESORPTION; AU(111); THIOLS; self-assembly; electrical control; electrode capacitance; addressable immobilization; (bio)sensor array |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Antje J. Bäumner, formerly Prof. Wolfbeis) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Dec 2022 07:19 |
| Last Modified: | 05 Dec 2022 07:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48703 |
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