The application of ferrocene‐modified n‐type silicon in glucose biosensors

This article describes the application of ferrocene‐modified n‐type silicon electrodes to the anaerobic redox catalysis of glucose oxidase. The electrodes are modified with ferrocene either directly, by using (1,1′‐ferrocenediyl)dichlorosilane, or via an underlying polypyrrole film. Light‐activated catalytic waves are detected in both cases in the presence of glucose oxidase and glucose, thereby demonstrating rapid heterogeneous kinetics between the covalently immobilized mediator and glucose oxidase. A glucose‐sensitive electrode is made by simple adsorption of glucose oxidase from an aqueous buffered solution into the surface film.