Gold nanoparticles on a thiol-functionalized silica network for ascorbic acid electrochemical detection in presence of dopamine and uric acid

dc.creatorde Morais, A
dc.creatorSilveira, G
dc.creatorVillis, PCM
dc.creatorMaroneze, CM
dc.creatorGushikem, Y
dc.creatorPissetti, FL
dc.creatorLucho, AMS
dc.date2012
dc.dateSEP
dc.date2014-07-30T17:48:07Z
dc.date2015-11-26T16:53:14Z
dc.date2014-07-30T17:48:07Z
dc.date2015-11-26T16:53:14Z
dc.date.accessioned2018-03-28T23:40:19Z
dc.date.available2018-03-28T23:40:19Z
dc.identifierJournal Of Solid State Electrochemistry. Springer, v. 16, n. 9, n. 2957, n. 2966, 2012.
dc.identifier1432-8488
dc.identifierWOS:000307754900014
dc.identifier10.1007/s10008-012-1701-z
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/68133
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/68133
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276521
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionA simple preparation methodology able to stabilize gold nanoparticles and to obtain an electrode which detects ascorbic acid, uric acid, and dopamine by different techniques is presented. A 3-mercaptopropyl-functionalized silica network was synthesized using the sol-gel method. Gold nanoparticles (nAu) were immobilized on the material at synthesis by adding a sol of these previously prepared particles to the reaction mixture. The electrochemical behavior of the SiO2/MPTS/Au carbon paste electrode was studied using cyclic voltammetry in the presence of a hexacyanoferrate probe molecule. The presence of nAu in the functionalized silica network changes the electrochemical characteristics of the material, favoring the electron transfer process of this complex ion. The SiO2/MPTS/Au electrode was proven to be an efficient tool in the simultaneous determination of ascorbic acid (H(2)AA), dopamine (DA), and uric acid (UA) using square wave voltammetry techniques. With the nAu on the electrode, an increase in the peak current related to the redox process of the H(2)AA, DA, and UA was observed. The separations of the anodic peak potentials between DA/H(2)AA and UA/H(2)AA were 310 and 442 mV, respectively. The results obtained show that the SiO2/MPTS/Au electrode can be used in the simultaneous determination of H(2)AA, DA, and UA.
dc.description16
dc.description9
dc.description2957
dc.description2966
dc.descriptionUnifal-MG
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherSpringer
dc.publisherNew York
dc.publisherEUA
dc.relationJournal Of Solid State Electrochemistry
dc.relationJ. Solid State Electrochem.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectGold nanoparticles
dc.subjectSol-gel
dc.subjectThiol
dc.subjectAscorbic acid
dc.subjectSimultaneous determination
dc.subjectGlassy-carbon Electrode
dc.subjectSilsesquioxane Polymer-film
dc.subjectSelf-assembled Monolayer
dc.subjectElectrocatalytic Oxidation
dc.subjectVoltammetric Determination
dc.subjectMetal Nanoparticles
dc.subjectSelective Detection
dc.subjectOxide Electrode
dc.subjectPaste Electrode
dc.subjectBiosensor
dc.titleGold nanoparticles on a thiol-functionalized silica network for ascorbic acid electrochemical detection in presence of dopamine and uric acid
dc.typeArtículos de revistas


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