Solid-state voltammetry in a three electrode electrochemical cell-on-a-chip with a microlithographically defined microelectrode

Journal Article · Thu Dec 15 04:00:00 EST 1988 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00175a026· OSTI ID:5993029

Morita, M; Longmire, M L; Murray, R W

Microlithographic procedures are employed to fabricate electrochemical microcells with three coplanar gold-film electrodes (working, auxiliary, and reference) resting on a silicon water. The working electrode can be a 11 /times/ 516 or 11 /times/ 256 ..mu..m microband or a 11 /times/ 11 ..mu..microsquare, and the cell solution of a film of an ionically conducting polymer such as lithium triflate dissolved in poly(ethylene oxide). The cyclic voltammetry and chronoamperometry of electroactive species dissolved in these cell media are reported, and the chronoamperometric data are compared to theoretical current-time curves calculated for band microelectrodes. Cyclic voltammetry in an aqueous droplet on the microsquare gives pseudo-steady-state-waves, the limiting currents of which quantitatively agree with those for microdisk electrodes of equivalent area. The microlithographically defined microcells can be produced in quantity and can be considered disposable electroanalytical devices, which can be advantageous for routine electroanalytical applications involving electrode-poisoning reaction systems.

• Research Organization: Univ. of North Carolina, Chapel Hill (USA)
• OSTI ID: 5993029
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:24; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400400* -- Electrochemistry
CHEMISTRY
DATA
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
FILMS
GOLD
INFORMATION
METALS
NUMERICAL DATA
THIN FILMS
TRANSITION ELEMENTS
VOLTAMETRY