Facile two-step electrodeposition synthesis of CuO nanowires for ultrasensitive non-enzymatic sensing of glucose

Abstract

In this manuscript, well-defined copper(II) oxide nanowires (CuO NWs) structures were successfully synthesized by simple, template-and surfactant-free two-step electrodeposition method. The obtained CuO NWs were investigated using field emission scanning electron microscopy (FESEM) and X-ray photoelectron spectroscopy (XPS). The electrochemical properties of the CuO NWs modified glassy carbon (CuO NWs/GC) electrode towards nonenzymatic detection of glucose (Glc) under alkaline conditions were studied by cyclic voltammetry (CV) and chronoamperometry. Excellent electroreduction activity of CuO NWs towards Glc was observed. The CuO NWs/GC sensor was characterized by the wide linear range for Glc (0.0125-4.29 mM), high sensitivity (759.86 μA mM-1 cm-2), short response time (4s) and the low limit of detection (LOD = 4.17 μM). Moreover, the sensor showed good reproducibility, anti-interferant ability and long-term stability. Hence it suggests a potential applicability of CuO NWs/GC as a sensor for nonenzymatic detection and quantification of glucose.