A very low potential electrochemical detection of L-cysteine based on a glassy carbon electrode modified with multi-walled carbon nanotubes/gold nanorods

dc.creatorSilva, FDD
dc.creatorda Silva, MGA
dc.creatorLima, PR
dc.creatorMeneghetti, MR
dc.creatorKubota, LT
dc.creatorGoulart, MOF
dc.date2013
dc.dateDEC 15
dc.date2014-07-30T13:43:11Z
dc.date2015-11-26T17:40:20Z
dc.date2014-07-30T13:43:11Z
dc.date2015-11-26T17:40:20Z
dc.date.accessioned2018-03-29T00:22:00Z
dc.date.available2018-03-29T00:22:00Z
dc.identifierBiosensors & Bioelectronics. Elsevier Advanced Technology, v. 50, n. 202, n. 209, 2013.
dc.identifier0956-5663
dc.identifierWOS:000325188200032
dc.identifier10.1016/j.bios.2013.06.036
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53962
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53962
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1286698
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionA nanohybrid platform built with multi-walled carbon nanotubes and gold nanorods, prepared via a cationic surfactant-containing seed-mediated sequential growth process, in aqueous solution, on a glassy carbon substrate has been successfully developed to be used in the electrocatalytic oxidation of L-cysteine (Cys). The nanohybrid was characterized by transmission electron microscopy, Raman spectroscopy and electrochemical measurements. Cyclic voltammetry results had shown that the modified electrode allows the oxidation of Cys at a very low anodic potential (0.00 V vs. Ag/AgCl). The kinetic constant k(cat) for the catalytic oxidation of Cys was evaluated by chronoamperometry and provided a value of 5.6 x 10(4) L mol(-1) s(-1). The sensor presents a linear response range from 5.0 up to 200.0 mu mol L-1, detection limit of 8.25 nmol L-1 and a sensitivity of 120 nA L mu mol(-1). (C) 2013 Elsevier B.V. All rights reserved.
dc.description50
dc.description202
dc.description209
dc.descriptionPRONEX/FAPEAL
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionPROCAD/NF
dc.descriptionINCT-Bionalitica
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Advanced Technology
dc.publisherOxford
dc.publisherInglaterra
dc.relationBiosensors & Bioelectronics
dc.relationBiosens. Bioelectron.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectGold nanorods
dc.subjectMWCNT
dc.subjectL-cysteine
dc.subjectElectrocatalysis
dc.subjectChemically modified electrodes
dc.subjectFilm-modified Electrode
dc.subjectGold Nanoparticles
dc.subjectAmino-acids
dc.subjectElectrocatalytic Oxidation
dc.subjectOxide Nanoparticles
dc.subjectAmperometric Sensor
dc.subjectAscorbic-acid
dc.subjectHigh-density
dc.subjectBio-thiols
dc.subjectSurface
dc.titleA very low potential electrochemical detection of L-cysteine based on a glassy carbon electrode modified with multi-walled carbon nanotubes/gold nanorods
dc.typeArtículos de revistas


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