Modification of Microelectrode Arrays: New Microelectrochemical Devices for Sensor Applications.
Interim Technical rept.,
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY
Pagination or Media Count:
Microelectrode arrays consisting of two or eight closely spaced approx. 1 micron Au or Pt microelectrodes approx. 2 micron wide x approx. micron long x 0.1 micron high can be modified with a variety of redox active materials in a way that leads to microelectrochemical devices that may be useful as sensors. In general, a pair of microelectrodes connected by a redox active material represents a device, because the current, I sub D, passing from one microelectrode source to the other drain at a fixed potential between them, V sub D, can be modulated by electrically- or chemically-induced changes in the state of charge of the redox material. The fundamental issues associated with pH-sensitive devices based on poly3-methylthiophene, poly4-vinylpyridine, a viologen-quinone redox polymer, and WO3 are described to illustrate generic concepts that underlie the development of microelectrochemical sensors. Author
- Physical Chemistry
- Electrical and Electronic Equipment