Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 304, Issue 1, Pages E400-E402Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2006.01.222
Keywords
Fe3O4 nanoparticles; Screen-printed carbon electrodes (SPCES); Electrochemical impedance spectroscopy (EIS); Glucose biosensor
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Magnetic Fe3O4 nanoparticles (Nano-Fe3O4) were prepared by co-precipitation method and a disposable glucose biosensor was fabricated by drop coating of ferricyanide (Ferri)-Nano-Fe3O4 mixture onto the surface of screen-printed carbon electrodes (SPCEs), and then by layering-on glucose oxidase (GOD). The electrochemical characteristics of modified SPCEs were analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA). The glucose biosensors exhibit a relatively fast response (< 15 s) and high sensitivity (ca. 1.74 mu AmM-1) with a wide linear range up to 33.3mM (600mg dL(-1)) of glucose. (C) 2006 Published by Elsevier B. V.
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