caa a22 4500 445880066 CHVBK 20180317145540.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00604-011-0681-5 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0681-5 Gold nanoparticle-coated multiwall carbon nanotube-modified electrode for electrochemical determination of methyl parathion [Elektronische Daten] [Jian-Chun Ma, Wei-De Zhang] We report on an electrochemical sensor for the determination of methyl parathion. It is based on an electrode modified with multi-walled carbon nanotubes that were covered with gold nanoparticles (Au-NPs). The vertically aligned array of MWCNTs on a tantalum substrate was coated with Au-NPs by overhead magnetron sputtering deposition. Scanning and transmission electron microscopy and XRD were used to characterize the Au-NP-MWCNTs composite. Cyclic voltammetry and differential pulse voltammetry were employed to evaluate the suitability of the new electrode for the determination of methyl parathion. Under the optimal conditions, the current response of the electrode to methyl parathion is linear in the range from 0.50 to 16.0 mg mL-1, with a detection limit of 50 μg mL-1 (signal/noise = 3), and the sensitivity is 4.5 times better than that of the plain MWCNTs electrode. We conclude that this method represents a simple, rapid, effective and sensitive approach for the detection of methyl parathion. Figure Gold nanoparticles were coated onto vertically aligned carbon nanotubes by over head magnetron sputtering deposition. The Au/MWCNTs electrode exhibits high performance and long term storage stability for eletroanalysis of methyl parathion, showing a linear dependence in methyl parathion concentration from 0.50 to 16.0 μg·mL-1 and detection limit of 0.050 μg·mL-1. Springer-Verlag, 2011 Gold nanoparticles nationallicence Carbon nanotubes nationallicence Methyl parathion nationallicence Electrochemical sensor nationallicence Ma Jian-Chun School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, 510640, Guangzhou, People's Republic of China aut Zhang Wei-De School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, 510640, Guangzhou, People's Republic of China aut Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 309-314 0026-3672 175:3-4<309 2011 175 604 https://doi.org/10.1007/s00604-011-0681-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0681-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ma Jian-Chun School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, 510640, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Wei-De School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, 510640, Guangzhou, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 309-314 0026-3672 175:3-4<309 2011 175 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer