Chemical Derivatization of Microelectrode Arrays by Oxidation of Pyrrole and N-Methylpyrrole: Fabrication of Molecule-Based Electrode Devices.
Abstract
An array of eight Au microelectrodes, each approximately 0.12 microns thick, 3 microns wide, and 140 microns long separated from each other by a distance of 1.4 micron has been fabricated on a 0.45 micron thick Si02 layer grown on a single crystal Si substrate using standard microfabrication techniques. Each electrode can be individually addressed and characterized electrochemically. The individual electrodes can b functionalized with polypyrrole or with poly-N-methylpyrrole by oxidation of pyrrole or N-methylpyrrole, respectively, using conditions similar to those for macroscopic electrodes. The amount of polymer deposited can be controlled and it is possible to electrically connect adjacent microelectrodes with deposited polymer. Since the reduced forms of these polymers are insulating and the oxidized forms are electronically conducting it is possible to prepare electronic devices that are analogous to diodes and transistors using adjacent microelectrodes connected with polymer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 10, 1984
- Accession Number
- ADA146378
Entities
People
- G. P. Kittlesen
- H. S. White
- M. S. Wrighton
Organizations
- Massachusetts Institute of Technology