Fabrication and characterization of an electrochemical glucose biosensor using zinc oxide nanoparticles and soy protein isolate film support matrix

Here, we report the development of an electrochemical glucose biosensor with ZnO nanoparticles (NPs) and soy protein isolate film (SPIF) as an enzyme immobilization support matrix. Both, the ZnO NPs and the SPIF, were characterized by conventional techniques. The electrochemical studies were carried out using cyclic voltammetry experiments recorded under the optimum scan rate of 0.15 Vs(-1) and at a neutral pH of 7.0. The cyclic voltammogram displayed good reduction peaks at different glucose concentrations. These new results indicate the potential candidature of the combination ZnO nanoparticles and SPIF support matrix as a simple, eco-friendly electrochemical biosensor for glucose sensing.