淡江大學機構典藏:Item 987654321/97197
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    题名: In situ detection of dopamine using nitrogen incorporated diamond nanowire electrode
    作者: Jayakumar Shalini;Kamatchi Jothiramalingam Sankaran;Dong, Chung-Li;Lee, Chi-Young;Tai, Nyan-Hwa;Lin, I-Nan
    贡献者: 淡江大學物理學系
    日期: 2013-02
    上传时间: 2014-03-18 09:57:07 (UTC+8)
    出版者: Cambridge: R S C Publications
    摘要: 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.
    關聯: Nanoscale 5(3), pp.1159-1167
    DOI: 10.1039/C2NR32939E
    显示于类别:[物理學系暨研究所] 期刊論文

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