caa a22 4500 445880899 CHVBK 20180317145542.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s00604-010-0527-6 doi (NATIONALLICENCE)springer-10.1007/s00604-010-0527-6 Amperometric determination of L-tyrosine by an enzymeless sensor based on a carbon ceramic electrode modified with copper oxide nanoparticles [Elektronische Daten] [Habib Razmi, Hojjat Nasiri, Rahim Mohammad-Rezaei] We report on the electrochemical formation of copper oxide nanoparticles (CuO-NPs) at a carbon ceramic electrode (CCE) as a highly-porous substrate. A copper film was deposited on the surface of the CCE and derivatized in situ to give CuO-NPs by potential cycling between −0.8 and 0.35V in strongly alkaline solution. The electrode was characterized by scanning electron microscopy and cyclic voltammetry. The CuO-NPs exhibited excellent electrocatalytic activity toward the oxidation of L-tyrosine (L-Tyr) in responding linearly in the 2 to 1,350μM concentration range, an associated detection limit (S/N = 3) of 160nM, and a sensitivity of 0.61AM−1cm−2. Cyclic voltammograms of the bare CCE (a, c) and nano-copper oxide coated CCE (b, d) in 0.05mol L−1 NaOH solution in the absence (a, b) and presence of 6mmol L−1 L-Tyr (c, d) at scan rate of 50mVs−1 Springer-Verlag, 2010 L-Tyrosine nationallicence Copper oxide nationallicence Nanoparticles nationallicence Modified electrode nationallicence Electrocatalysis nationallicence Razmi Habib Electrochemistry Research Lab., Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, P.O. Box: 53714-161, Tabriz, Iran aut Nasiri Hojjat Electrochemistry Research Lab., Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, P.O. Box: 53714-161, Tabriz, Iran aut Mohammad-Rezaei Rahim Electrochemistry Research Lab., Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, P.O. Box: 53714-161, Tabriz, Iran aut Microchimica Acta Springer Vienna 173/1-2(2011-04-01), 59-64 0026-3672 173:1-2<59 2011 173 604 https://doi.org/10.1007/s00604-010-0527-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0527-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Razmi Habib Electrochemistry Research Lab., Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, P.O. Box: 53714-161, Tabriz, Iran aut NATIONALLICENCE 700 1- Nasiri Hojjat Electrochemistry Research Lab., Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, P.O. Box: 53714-161, Tabriz, Iran aut NATIONALLICENCE 700 1- Mohammad-Rezaei Rahim Electrochemistry Research Lab., Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, P.O. Box: 53714-161, Tabriz, Iran aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 173/1-2(2011-04-01), 59-64 0026-3672 173:1-2<59 2011 173 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer