Pd-Ni/SiNWs electrode for nonenzymatic glucose detection

Abstract

Abstract: A nonenzymatic glucose sensor was fabricated by electroplating palladium particles on a nickel modified silicon nanowires(Ni/SiNWs) array electrode. The morphology of the Pd-Ni/SiNWs electrode was characterized by scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS) analysis. The performance of this sensor was characterized by cyclic voltammetry (CV) and fixed potential amperometry techniques. Under the fixed potential of +0.19 V, the sensitivity of the electrochemical oxidation for glucose is 302.2 μA·mM-1·cm-2 and the detection limit (S/N ratio=3) is 4.9 μM in the 0.1 M KOH alkaline electrolyte. Furthermore, the electrode shows good resistance for the interfering species such as the ascorbic acid (AA) and uric acid (UA). This novel sensor has great potential for the determination of glucose.

Key words: nonenzymatic glucose sensor, electroplating, Pd-Ni/SiNWs, cyclic voltammetry, fixed potential amperometry

CLC Number:

TN389

YU Jiang-jiang, ZHANG Jian, ZHENG Xiao-dong. Pd-Ni/SiNWs electrode for nonenzymatic glucose detection[J]. Journal of East China Normal University(Natural Sc, 2013, 2013(3): 202-208.

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