Electrochemical sensor based on imprinted sol-gel and nanomaterial for determination of caffeine

dc.creatorSantos, WDR
dc.creatorSanthiago, M
dc.creatorYoshida, IVP
dc.creatorKubota, LT
dc.date2012
dc.dateMAY 20
dc.date2014-07-30T17:23:03Z
dc.date2015-11-26T16:36:04Z
dc.date2014-07-30T17:23:03Z
dc.date2015-11-26T16:36:04Z
dc.date.accessioned2018-03-28T23:18:43Z
dc.date.available2018-03-28T23:18:43Z
dc.identifierSensors And Actuators B-chemical. Elsevier Science Sa, v. 166, n. 739, n. 745, 2012.
dc.identifier0925-4005
dc.identifierWOS:000305356900101
dc.identifier10.1016/j.snb.2012.03.051
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65187
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/65187
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1271700
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThe development of a novel sensitive molecularly imprinted electrochemical sensor is described for the detection of caffeine. The sensor was prepared onto a glassy carbon electrode modified with multiwall carbon nanotubes (MWCNTs)/vinyltrimethoxysilane (VTMS) recovered by a molecularly imprinted siloxane (MIS) film prepared by sol-gel process. MWCNTs/VTMS was produced by a simple grafting of VTMS on MWCNTs surface by in situ free radical polymerization. The siloxane layer was obtained from the acid-catalyzed hydrolysis/condensation of a solution constituted by tetraethoxysilane (TEOS), methytrimethoxysilane (MTMS), 3-(aminopropyl)trimethoxysilane (APTMS) and caffeine, as a template molecule. The morphology and performance of the imprinted siloxane film was characterized by scanning electron microscopy (SEM) and differential pulse voltammetry (DPV). The MIS/MWCNTs-VTMS/GCE sensor was tested in a solution of the caffeine and other similar molecules. After optimization of the experimental conditions, the sensor showed a linear response range from 0.75 to 40 mu mol L-1, with a detection limit (LOD) of 0.22 mu mol L-1. The imprinted sensor was successfully tested to detect caffeine in real samples. (C) 2012 Elsevier B.V. All rights reserved.
dc.description166
dc.description739
dc.description745
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationSensors And Actuators B-chemical
dc.relationSens. Actuator B-Chem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectElectrochemical sensor
dc.subjectMolecular imprinting siloxane
dc.subjectSol-gel
dc.subjectMWCNTs
dc.subjectCaffeine
dc.subjectGlassy-carbon Electrode
dc.subjectSensitive Determination
dc.subjectAnodic Voltammetry
dc.subjectRecognition
dc.subjectTheobromine
dc.subjectNanotubes
dc.subjectFilms
dc.subjectAcid
dc.subjectTheophylline
dc.subjectPolymers
dc.titleElectrochemical sensor based on imprinted sol-gel and nanomaterial for determination of caffeine
dc.typeArtículos de revistas


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