CuO-modified Cu electrodes for glucose sensing

Electrochemical sensors are largely used for rapid, sensitive and accurate measurement of glucose in many applications such as clinical diagnostics, ecological field, biotechnology and food industry. Among the various methods, the amperometric one is the most popular due to its simplicity and high sensitivity. Furthermore, due to their higher intrinsic stability, electrochemical glucose sensors based on inorganic materials are preferred with respect to enzymatic ones for applications in severe conditions. Herein, we present a simple method to prepare an electrochemical sensor for the determination of glucose by modification of planar copper electrodes in order to obtain a high sensitive copper oxide-modified electrode. In particular, we show the versatility of the preparation method comparing the electrochemical sensing properties towards glucose of two modified copper electrodes, commercial and homemade, respectively.