caa a22 4500 445880171 CHVBK 20180317145540.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00604-011-0689-x doi (NATIONALLICENCE)springer-10.1007/s00604-011-0689-x Determination of ascorbic acid using an electrode modified with cysteine self-assembled gold-platinum nanoparticles [Elektronische Daten] [Yuanyuan Lin, Yanling Hu, Yumei Long, Junwei Di] We report on a new type of indium tin oxide (ITO) electrode for sensing ascorbic acid (AA). The ITO film was modified with gold-platinum alloy nanoparticles (Au-Pt NPs) functionalized with a self-assembled film of L-cysteine. The Au-Pt NPs were electrodeposited on the ITO film and characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction. A cyclic voltammetric study revealed that the electrode exhibits excellent electrocatalytic activity towards the oxidation of AA. The calibration plot for AA is linear over the concentration range from 2 to 400μM with a correlation coefficient of 0.9991. The detection limit of AA is 1μM. Figure Gold-platinum nanoparticles were electrodeposited on the indium tin oxide electrode surface and then self-assembled with cysteine. The resulting sensor exhibited excellent electrocatalytic activity towards the oxidation of ascorbic acid. The modified electrode is high sensitivity, easy fabrication, mediator-free and low cost. Springer-Verlag, 2011 Ascorbic acid nationallicence Gold-platinum alloy nanoparticles nationallicence Cysteine nationallicence Self-assembly nationallicence Lin Yuanyuan College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut Hu Yanling College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut Long Yumei College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut Di Junwei College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 259-264 0026-3672 175:3-4<259 2011 175 604 https://doi.org/10.1007/s00604-011-0689-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0689-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lin Yuanyuan College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Hu Yanling College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Long Yumei College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut NATIONALLICENCE 700 1- Di Junwei College of Chemistry, Chemical Engineering and Material Science, Soochow University, 215123, Suzhou, Jiangsu, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 259-264 0026-3672 175:3-4<259 2011 175 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer