Ensemble of carbon fiber ultra-microelectrodes modified with nanotubes, and its application to the determination of dopamine |
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| Authors: | Weixia Qing Xiuhua Liu Huimin Lu Ji Liang Kuaizhi Liu |
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| Affiliation: | (1) Department of Chemistry and Chemical Engineering, Henan University, Henan Kaifeng, P.R. China;(2) Institute of Natural Products and Medicine Chemistry, Henan University, Henan Kaifeng, P.R. China;(3) Lab of Specially Functional Materials, Henan University, Henan Kaifeng, P.R. China;(4) Department of Mechanics, Tsinghua University, Beijing, P.R. China |
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| Abstract: | An ensemble of carbon fibers ultra-microelectrode modified with carbon nanotubes (EUME-CNTS) has been constructed based on a thin carbon nanotubes film which was coated onto surfaces of carbon fibers of ultra-microelectrode. SEM micrographs illustrated the image of carbon nanotubes on the carbon fiber surface. The electrochemical characteristics of the EUME-CNTS has been investigated by cyclic voltammetry. The electrochemical properties of dopamine on this electrode were also studied, and the detection limit was found to be 2.0 × 10−9 mol·L−1. Linear calibration plots were obtained for the oxidation peak current in a range 1.0 × 10−7–8.0 × 10−5 mol·L−1. Correspondence: Xiuhua Liu, Kuaizhi Liu, Department of Chemistry and Chemical Engineering, Henan University, Henan Kaifeng 475001, P.R. China |
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| Keywords: | : Carbon fiber ultra-microelectrode carbon nanotubes modified electrode dopamine |
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