Abstract
The needle type titanium oxide glucose sensor has been already developed. The property of the oxygen electrode, however, was in sufficient. The surface of the electrode has been modified with platinum to improve the performance. It has been suggested that the reaction of oxygen reduction preferentially proceeds on the platinum sites. The applied potential for the oxygen electrode system became nobler (more positive side) than the former type. The bare glucose sensor without the semipermeable membrane, based on the platinum modified titanium oxide electrode, responds to the glucose level up to 50 mg/dl within 30 second. Miniaturization of the sensor has been performed by using the side wall of the titanium wire electrode as the active and enzyme immobilizing site; about 1.1 mm in diameter and 15 mm in length, except the cable.
