Abstract
A new type of interdigitated array (IDA) microelectrode based on carbon film was developed. A conductive carbon film was prepared on a platinum coated Si wafer by the pyrolysis of 3,4,9,10-perylenetetracarboxylic dianhydride. The IDA microelectrode was fabricated by photolithographic techniques from the carbon/platinum composite film. The IDA electrode had 50 microband pairs. The width of each microband was 3 μm with a length of 2 mm, and the gap between two electrode bands was 2 μm. The electrode was characterized by cyclic voltammetry with water soluble ferrocene and ruthenium hexa-amine. The potential window without redox species was found to be similar to that of a conventional glassy carbon electrode. The IR drop was negligible in a measurement with 10 μM water soluble ferrocene at a moderate scan rate. Generation-collection voltammograms of water soluble ferrocene and ruthenium hexa-amine show clear limiting currents and their response in the negative potential range was superior to that of conventional metal film IDA electrodes.
Original language | English |
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Pages (from-to) | 25-33 |
Number of pages | 9 |
Journal | Journal of Electroanalytical Chemistry |
Volume | 334 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1992 Sep 4 |
Externally published | Yes |
ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)
- Electrochemistry