Nonenzymatic Glucose Sensor Using MIM Pt/CuO/Pt

Abstract

Low cost, high sensitivity and stability are the key features that steer the research and development of glucose sensing. In this paper we report on a low cost metal-insulator- metal (MIM) based sensor that responds to different glucose concentrations. The unique planar Pt/CuO/Pt structure provides large electrochemically active surface area which aids glucose oxidation. The device shows sensitivity to different glucose concentrations, that span low to high blood glucose levels for typical concentrations found in human blood. The fabricated sensor exhibits the ability to detect the glucose concentration at neutral pH (i.e. pH = 7). This eliminates the dilution step needed for most of the existing nonenzymatic glucose sensors to achieve alkaline medium that is essential to perform redox reactions in the absence of glucose oxidase. Unlike the available devices, the fabricated MIM structure involves two metal electrodes in the interaction to improve the sensitivity of the device. This contribution provides new insights into design and fabrication of low cost biomedical sensors.