Electrooxidation of catecholamines at carbon nanotube-modified indium tin oxide electrodes |
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Authors: | Lin Kuan-Wen Lin Chang-Hao Hsieh You-Zung |
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Affiliation: | Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan |
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Abstract: | In this study, we prepared carbon nanotube (CNT)/Nafion-modified ITO electrodes and investigated their electrochemical behavior. The CNTs were dissolved in a solution of the ionic polymer Nafion and then CNT/Nafion composite films were deposited onto ITO electrodes through spin-coating of this homogeneous solution. We studied the effects of chemical pretreatment of the CNTs and the pH of the buffer on the electroanalytical behavior of the CNT/Nafion-modified ITO electrodes toward catecholamines. The modified electrodes enhanced the peak current and lowered the overpotentials. We observed high electrooxidative performance for the modified ITO electrodes: the oxidative currents of the catecholamines were up to 125-fold higher than those obtained using bare ITO electrodes. |
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Keywords: | Carbon nanotubes Electroanalysis Nafion Tin indium oxide |
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