Electrochemical studies based on local interfacial ph changes of gold nanoparticles immobilized on polystyrene brushes

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dc.contributor.authorAntonio, Tamara R.T.A. [UNESP]
dc.contributor.authorBasso, Caroline R. [UNESP]
dc.contributor.authorCabra, Murilo F.
dc.contributor.authorPedrosa, Valber A. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2014-05-27T11:28:37Z
dc.date.available2014-05-27T11:28:37Z
dc.date.issued2013-03-01
dc.description.abstractThe electrochemical behavior of polystyrene modified with gold nanoparticle (Au NPs) was investigated in terms of pH-responsive polymer brush. A pH-responsive of modified polymer brush from tethered polystyrene was prepared and used for selective gating transport of anions andcations across the thin-film. An ITO-coated glass electrode was used as substrate and applied to study the switchable permeability of the polymer brush triggered by changes in pH of the aqueous environment. The pH-sensitive behavior of the polymer brush interface has been demonstrated by means of cyclic voltammetry (CV) and Localized Surface Plasmon Resonance (LSPR). CV experiments showed at ph values of 4 and 8 induces swelling and shrinking of the grafted polymer brushes, respectively, and this behavior is fast and reversible. LSPR measurements showed a blue shift of 33 nm in the surface resonance band changes by local pH. The paper brings an easy methodology to fabrication a variety of nanosensors based on the polymer brushes-nanoparticle assemblies. © 2013 by ESG.en
dc.description.affiliationInstitute of Bioscience Department of Chemistry and Biochemistry UNESP, Botucatu, SP
dc.description.affiliationInstitute of Biology Department of Genetics, Evolution and Bioagents UNICAMP, Campinas, SP
dc.description.affiliationUnespInstitute of Bioscience Department of Chemistry and Biochemistry UNESP, Botucatu, SP
dc.format.extent4150-4159
dc.identifierhttp://www.electrochemsci.org/papers/vol8/80304150.pdf
dc.identifier.citationInternational Journal of Electrochemical Science, v. 8, n. 3, p. 4150-4159, 2013.
dc.identifier.file2-s2.0-84875079906.pdf
dc.identifier.issn1452-3981
dc.identifier.lattes7781282422851911
dc.identifier.scopus2-s2.0-84875079906
dc.identifier.urihttp://hdl.handle.net/11449/74784
dc.language.isoeng
dc.relation.ispartofInternational Journal of Electrochemical Science
dc.relation.ispartofjcr1.369
dc.relation.ispartofsjr0,366
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectGold nanoparticle
dc.subjectLocal pH change
dc.subjectPolymer brushes
dc.subjectStimuli-responsive materials
dc.titleElectrochemical studies based on local interfacial ph changes of gold nanoparticles immobilized on polystyrene brushesen
dc.typeArtigo
unesp.author.lattes7781282422851911
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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