A novel nonenzymatic fructose sensor based on electrospun LaMnO3 fibers

We have developed a nonenzymatic electrochemical sensor based on a carbon paste electrode modified with electrospun LaMnO3 fibers for fructose determination. LaMnO3 fibers, a kind of perovskite-type oxide, were prepared by electrospinning and subsequent calcination process. The morphology and structure of LaMnO3 fibers were characterized by scanning electron microscope, X-ray diffraction and Fourier Transform Infrared spectrum. The electrochemical response of the proposed sensor was evaluated by cyclic voltammetry and amperometry. Under optimal conditions, the linear response for fructose determination was obtained in the range of 0.4–100 μM, with a low detection limit of 63 nM (S/N = 3).

(A) SEM image of the as-synthesized LaMnO3 sample; (B) current–time curve of LaMnO3/CPE at different concentrations of fructose (inset: the calibration curve for fructose determination).Figure optionsDownload as PowerPoint slide