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

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Estadual de Campinas (UNICAMP)
dc.creatorAntonio, Tamara R. T. A. [UNESP]
dc.creatorBasso, Caroline R. [UNESP]
dc.creatorCabral, Murilo F.
dc.creatorPedrosa, Valber A. [UNESP]
dc.date2014-12-03T13:10:59Z
dc.date2014-12-03T13:10:59Z
dc.date2013-03-01
dc.date.accessioned2023-09-09T10:03:11Z
dc.date.available2023-09-09T10:03:11Z
dc.identifierhttp://www.electrochemsci.org/papers/vol8/80304150.pdf
dc.identifierInternational Journal of Electrochemical Science. Belgrade: Esg, v. 8, n. 3, p. 4150-4159, 2013.
dc.identifier1452-3981
dc.identifierhttp://hdl.handle.net/11449/112689
dc.identifierWOS:000316566700088
dc.identifierWOS000316566700088.pdf
dc.identifier7781282422851911
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8762313
dc.descriptionThe 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 and cations 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.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionUNESP, Dept Chem & Biochem, Inst Biosci, Botucatu, SP, Brazil
dc.descriptionUniv Estadual Campinas, Dept Genet Evolut & Bioagents, Inst Biol, Campinas, SP, Brazil
dc.descriptionUNESP, Dept Chem & Biochem, Inst Biosci, Botucatu, SP, Brazil
dc.descriptionFAPESP: 10/07478-5
dc.format4150-4159
dc.languageeng
dc.publisherEsg
dc.relationInternational Journal of Electrochemical Science
dc.relation1.369
dc.relation0,366
dc.rightsAcesso aberto
dc.sourceWeb of Science
dc.subjectPolymer brushes
dc.subjectLocal pH change
dc.subjectgold nanoparticle
dc.subjectstimuli-responsive materials
dc.titleElectrochemical studies based on local interfacial ph changes of gold nanoparticles immobilized on polystyrene brushes
dc.typeArtigo


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