DISPOSABLE OXYGEN ELECTRODES FABRICATED BY SEMICONDUCTOR TECHNIQUES AND THEIR APPLICATION TO BIOSENSORS

We fabricated a miniature Clark-type oxygen electrode using semiconductor techniques. The oxygen electrode features V-grooves to contain a 0.1 M KCl electrolyte impregnated in a gel, and a directly formed gas-permeable membrane over the gel. A fast response and a good linearity from zero oxygen concentration to saturation was obtained using the Ag/AgCl anode. The oxygen electrode was used in a disposable miniature CO2 sensor. Also, an l-lysine sensor was developed that functions by immobilizing l-lysine decarboxylase on the sensitized area of the CO2 sensor. © 1990.