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A Study of Polyaniline Deposited Nanocrystalline Diamond Films for Glucose Detection

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Nitrogen-doped nanocrystalline diamond (NCD) films have been deposited on Si substrates in CH4/Ar/N2 gas mixtures by the microwave plasma enhanced chemical vapor deposition (MPECVD) technique. Such films contain very small diamond grains (10 to 30 nm) with high electrical conductivity (126 Ω−1 cm−1) compared to un-doped ones. The films were characterized by scanning electron microscopy (SEM) and Raman spectroscopy. Near edge X-ray fine structure studies showed that the nitrogen-doped NCD had slightly higher sp2/sp3 bonding ratio compared to the un-doped sample. A nitrogen-doped NCD electrode was functionalized by conducting polymer films (polyaniline) to work as an interface for biomedical applications. Glucose sensing has been demonstrated based on this functionalized electrode. Linear response of the sensor has been observed for glucose concentration up to 9 mM.
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Document Type: Research Article

Publication date: 2007-06-01

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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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