Chemically synthesized CuO nanostructures for non-enzymatic glucose sensor: effect of deposition time

Abstract

In the present work, the chemical bath deposition technique was used to synthesize CuO electrodes. Their electrochemical properties were examined for non-enzymatic glucose sensors. In order to analyse, the crystallinity of prepared electrodes X-ray diffractometer (XRD) was used whereas Field Emission Scanning Microscope (FE-SEM) was for morphological study. The synthesized bundles of CuO nanosheets exhibited the monoclinic phase. For the study of electrochemical properties of prepared CuO electrodes, cyclic voltammetry and chronoamperometry techniques have been adopted. The developed CuO electrodes are the best candidates for non-enzymatic glucose sensing, showing excellent response. It shows high sensitivity 1594 µAmM−1cm−2 with potential of + 0.6V, active time period of approximately 5 s, and linear range 3 μm to 3 mM. The CuO electrode’s selectivity toward interfering species such as ascorbic acid is also studied. The prepared electrode shows an excellent response to glucose compared to ascorbic acid.