ISFET glucose sensor system with fast recovery characteristics by employing electrolysis

The long recovery-time involved with an ion-sensitive field-effect transistor (ISFET)-based glucose sensor, in relation to long-term monitoring is one of the main problems preventing widespread commercialization. Accordingly, this paper proposes a new ISFET glucose sensor system with rapid recovery characteristics by an electrolysis method. In addition, since practical application requires a detailed understanding of the influence of electrolysis, the current article also investigates the recovery characteristics of an ISFET glucose sensor including the long-term stability, and the recovery time when using electrolysis. As a result, it was found that the recovery time of an ISFET glucose sensor was reduced to less than two minutes when using electrolysis in contrast to the 10 or 20min required using a conventional method. Furthermore, no variation in the long-term stability at biasing the reduction potential was observed for 15 days.