Accession Number:

ADA172299

Title:

PH-Sensitive WO(3)-Based Microelectrochemical Transistors.

Descriptive Note:

Interim technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY

Report Date:

1986-09-22

Pagination or Media Count:

41.0

Abstract:

Electrochemical properties of an array of closely spaced 1.2 micron Au or Pt microelectrodes approx. 2 micron wide x approx. 50 micron long x 0.1 micron high coated by a 0.15 micron thick layer of polycrystalline W03 are reported. The W03 is deposited on the electrodes by rf sputtering of a W03 target. The cyclic voltammetry of these microelectrodes indicates that W03 connects individual microelectrodes, since the voltammogram of a pair of microelectrodes driven together is indistinguishable from that of an individual microelectrode. W03 becomes a good conductor upon electrochemical reduction in aqueous solutions. The change in resistance of W03 connecting two microelectrodes as a function of electrochemical potential spans four orders of magnitude.

Subject Categories:

  • Physical Chemistry
  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE