A viologen/ruthenium oxide-based microelectrochemical diode with pH-dependent current-voltage characteristics
Abstract
A procedure for selectively derivatizing two adjacent (approx. 1.4 microns apart) microelectrodes with RuOx and the redox polymer derived from hydrolysis of N,N'-bis(p-(trimethoxy silyl)benzyl)-4,4' bipyridinium dichloride, (BPQ2+), n' to yield a physical RuOx/(BPQ2+)n junction is reported. Such a junction functions as a pH-dependent diode by virtue of the redox properties of the materials employed. A diode-like current voltage curve obtains, because charge transport across the RuOx/(BPQ2+)n junction is effectively unidirectional: the oxidized RuOx can oxidize the reduced viologen, but the reduced RuOx can oxidize the reduced viologen.
- Publication:
-
Massachusetts Inst. of Tech. Report
- Pub Date:
- May 1990
- Bibcode:
- 1990mit..reptZ....S
- Keywords:
-
- Diodes;
- Electrodes;
- Metal Oxides;
- Microelectronics;
- Oxidation-Reduction Reactions;
- Ruthenium;
- Semiconductor Junctions;
- Charge Transfer;
- Electric Current;
- Electric Potential;
- Ph Factor;
- Electronics and Electrical Engineering