In situ detection of dopamine using nitrogen incorporated diamond nanowire electrode
學年 101
學期 2
出版（發表）日期 2013-02-01
作品名稱 In situ detection of dopamine using nitrogen incorporated diamond nanowire electrode
作品名稱（其他語言）
著者 Jayakumar Shalini; Kamatchi Jothiramalingam Sankaran; Dong, Chung-Li; Lee, Chi-Young; Tai, Nyan-Hwa; Lin, I-Nan
單位 淡江大學物理學系
出版者 Cambridge: R S C Publications
著錄名稱、卷期、頁數 Nanoscale 5(3), pp.1159-1167
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.
關鍵字
語言 en
ISSN 2040-3364
期刊性質 國外
收錄於
產學合作
通訊作者 Lee, Chi-Young; Lin, I-Nan
審稿制度
國別 GBR
公開徵稿
出版型式 紙本
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