Synergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyanines

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dc.contributor.authorMedina-Plaza, C.
dc.contributor.authorFurini, L. N. [UNESP]
dc.contributor.authorConstantino, C. J. L. [UNESP]
dc.contributor.authorSaja, J. A. de
dc.contributor.authorRodriguez-Mendez, M. L.
dc.contributor.institutionUniv Valladolid
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-03-18T15:53:15Z
dc.date.available2015-03-18T15:53:15Z
dc.date.issued2014-12-03
dc.description.abstractA synergistic electrocatalytic effect was observed in sensors where two electrocatalytic materials (functionalized gold nanoparticles and lutetium bisphthalocyanine) were co-deposited using the Langmuir-Blodgett technique. Films were prepared using a novel method where water soluble functionalised gold nanoparticles [(11-mercaptoundecyl)tetra(ethylene glycol)] (SAuNPs) were inserted in floating films of lutetium bisphthalocyanine (LuPc2) and dimethyldioctadecylammonium bromide (DODAB) as the amphiphilic matrix. The formation of stable and homogeneous mixed films was confirmed by pi-A isotherms, BAM, UV-vis and Raman spectroscopy, as well as by SEM and TEM microscopy. The synergistic effect towards hydroquinone of the electrodes modified with LuPc2:DODAB/SAuNP was characterised by an increase in the intensity of the redox peaks and a reduction of the overpotential. This synergistic electrocatalytic effect arose from the interaction between the SAuNPs and the phthalocyanines that occur in the Langmuir-Blodgett films and from the high surface area provided by the nanostructured films. The sensitivity increased with the amount of LuPc2 and SAuNPs inserted in the films and limits of detection in the range of 10(-7) mol L-1 were attained. (C) 2014 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Valladolid, Dept Inorgan Chem, Sch Engn, E-47002 Valladolid, Spain
dc.description.affiliationUniv Estadual Paulista, UNESP, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.affiliationUniv Valladolid, Dept Condensed Matter Phys, Fac Sci, E-47002 Valladolid, Spain
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.sponsorshipCICYT
dc.description.sponsorshipMEC
dc.description.sponsorshipJunta de Castilla y Leon
dc.description.sponsorshipPIF-UVa
dc.description.sponsorshipIdCICYTAGL2012-33535
dc.description.sponsorshipIdMECPHB2011-0004PC
dc.description.sponsorshipIdJunta de Castilla y LeonVA032U13
dc.description.sponsorshipIdCAPES/DGU260/12
dc.format.extent95-102
dc.identifierhttp://dx.doi.org/10.1016/j.aca.2014.08.049
dc.identifier.citationAnalytica Chimica Acta. Amsterdam: Elsevier Science Bv, v. 851, p. 95-102, 2014.
dc.identifier.doi10.1016/j.aca.2014.08.049
dc.identifier.issn0003-2670
dc.identifier.urihttp://hdl.handle.net/11449/116395
dc.identifier.wosWOS:000344235300013
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofAnalytica Chimica Acta
dc.relation.ispartofjcr5.123
dc.relation.ispartofsjr1,512
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectGold nanoparticleen
dc.subjectBisphthalocyanineen
dc.subjectLangmuir-Blodgetten
dc.subjectSensoren
dc.subjectHydroquinoneen
dc.titleSynergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyaninesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes6118325967319836[3]
unesp.author.orcid0000-0001-7252-2949[4]
unesp.author.orcid0000-0002-9760-362X[5]
unesp.author.orcid0000-0002-5921-3161[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept

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