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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/97197


    Title: In situ detection of dopamine using nitrogen incorporated diamond nanowire electrode
    Authors: Jayakumar Shalini;Kamatchi Jothiramalingam Sankaran;Dong, Chung-Li;Lee, Chi-Young;Tai, Nyan-Hwa;Lin, I-Nan
    Contributors: 淡江大學物理學系
    Date: 2013-02
    Issue Date: 2014-03-18 09:57:07 (UTC+8)
    Publisher: Cambridge: R S C Publications
    Abstract: Significant difference was observed for the simultaneous detection of dopamine (DA), ascorbic acid (AA), and uric acid (UA) mixture using nitrogen incorporated diamond nanowire (DNW) film electrodes grown by microwave plasma enhanced chemical vapor deposition. For the simultaneous sensing of ternary mixtures of DA, AA, and UA, well-separated voltammetric peaks are obtained using DNW film electrodes in differential pulse voltammetry (DPV) measurements. Remarkable signals in cyclic voltammetry responses to DA, AA and UA (three well defined voltammetric peaks at potentials around 235, 30, 367 mV for DA, AA and UA respectively) and prominent enhancement of the voltammetric sensitivity are observed at the DNW electrodes. In comparison to the DPV results of graphite, glassy carbon and boron doped diamond electrodes, the high electrochemical potential difference is achieved via the use of the DNW film electrodes which is essential for distinguishing the aforementioned analytes. The enhancement in EC properties is accounted for by increase in sp2 content, new C–N bonds at the diamond grains, and increase in the electrical conductivity at the grain boundary, as revealed by X-ray photoelectron spectroscopy and near edge X-ray absorption fine structure measurements. Consequently, the DNW film electrodes provide a clear and efficient way for the selective detection of DA in the presence of AA and UA.
    Relation: Nanoscale 5(3), pp.1159-1167
    DOI: 10.1039/C2NR32939E
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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