An Effective Gold Nanotubes Electrode for Amperometric Biosensor
A sensitive and effective amperometric glucose biosensor based on gold nanotubes electrode (GNTE) was investigated. Gold nanotubes (GNTs), which were prepared by electroless plating of the metal within the pores of nanoporous polycarbonate (PC) track-etched membranes, were filled into a hollow teflon cylinder to construct a GNTE. Glucose oxidase (GOD) was immobilized on the electrode via glutaraldehyde cross-linkage method. The electrochemical properties were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The km value of the immobilized glucose oxidase on GNTE was 0.47 mM. The biosensor showed a linear range from 0.4 to 11 mM with excellent sensitivity of 8.77 A cm−2 mM−1 and fast response time within 5 s.
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Document Type: Research Article
Publication date: 2010-12-01
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- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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