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

dc.contributorUniv Valladolid
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorMedina-Plaza, C.
dc.creatorFurini, L. N. [UNESP]
dc.creatorConstantino, C. J. L. [UNESP]
dc.creatorSaja, J. A. de
dc.creatorRodriguez-Mendez, M. L.
dc.date2015-03-18T15:53:15Z
dc.date2015-03-18T15:53:15Z
dc.date2014-12-03
dc.date.accessioned2023-09-09T11:04:01Z
dc.date.available2023-09-09T11:04:01Z
dc.identifierhttp://dx.doi.org/10.1016/j.aca.2014.08.049
dc.identifierAnalytica Chimica Acta. Amsterdam: Elsevier Science Bv, v. 851, p. 95-102, 2014.
dc.identifier0003-2670
dc.identifierhttp://hdl.handle.net/11449/116395
dc.identifier10.1016/j.aca.2014.08.049
dc.identifierWOS:000344235300013
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8765880
dc.descriptionA 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.
dc.descriptionCICYT
dc.descriptionMEC
dc.descriptionJunta de Castilla y Leon
dc.descriptionPIF-UVa
dc.descriptionUniv Valladolid, Dept Inorgan Chem, Sch Engn, E-47002 Valladolid, Spain
dc.descriptionUniv Estadual Paulista, UNESP, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, Brazil
dc.descriptionUniv Valladolid, Dept Condensed Matter Phys, Fac Sci, E-47002 Valladolid, Spain
dc.descriptionUniv Estadual Paulista, UNESP, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, Brazil
dc.descriptionCICYTAGL2012-33535
dc.descriptionMECPHB2011-0004PC
dc.descriptionJunta de Castilla y LeonVA032U13
dc.descriptionCAPES/DGU260/12
dc.format95-102
dc.languageeng
dc.publisherElsevier B.V.
dc.relationAnalytica Chimica Acta
dc.relation5.123
dc.relation1,512
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectGold nanoparticle
dc.subjectBisphthalocyanine
dc.subjectLangmuir-Blodgett
dc.subjectSensor
dc.subjectHydroquinone
dc.titleSynergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyanines
dc.typeArtigo


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