Facile Synthesis of CuO/ITO Film Via the Chronoamperometric Electrodeposition for Nonenzymatic Glucose Sensing

Duong Thi Thuy Tran, Dung Quoc Nguyen, Chuyen Hong Pham, Lam Dai Tran, Dai Tien Nguyen

Abstract


We report on the synthesis of copper (II) oxide (CuO)/indium tin oxide (ITO) electrode via the electrochemical deposition method using a CuSO4 solution and then thermal oxidation in air at temperature of 400 oC for 2 h. The crystalline structure and morphology of CuO were characterized by scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The electrochemical properties of the CuO/ITO electrode to glucose in the alkaline medium of 0.1 M NaOH solution were investigated by cyclic voltammetry (CV) and Chronnoamperometry. The CuO-N/ITO electrode showed the best electrochemical properties for glucose detection in comparison to the others. Chronnoamperometry of CuO-N/ITO electrode to the glucose response showed excellent stability, the linear range of 1 mM to 3600 mM with high sensitivity of 283.6 mAcm-2mM-1 and 0.61 mM of the detection limit (S/N=3). A good response of the CuO-N/ITO electrode, which was investigated for different human serum samples, indicates a high potential of its towards a glucose sensor for analysis in real examples.


Keywords


copper (II) oxide, glucose sensing, chronoamperometry, cyclic voltammetry, human serum

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References


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DOI: https://doi.org/10.15625/0868-3166/30/2/14801 Display counter: Abstract : 140 views. PDF : 63 views.

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