Wearable chemical sensor for noninvasive biomonitering

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In fabrication process of an oxygen sensor, electrodes were formed on a polypropylene membrane by sputtering system. And then, a porous membrane with an electrolyte solution was encapsulated using a polyethylene membrane, obtaining the flexible oxygen sensor. In the evaluation of the sensor characteristics, the output current linearly correlated with the concentrations of dissolved oxygen and gaseous oxygen. The sensor was applied to rabbit's eye. As a result, the change of the output current with an inhalation of a high level oxygen gas was observed. Furthermore, a flexible glucose sensor was fabricated by immobilizing an enzyme onto the sensing region of the electrode.