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Immobilization of humic acid in nanostructured layer-by-layer films for sensing applications

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dc.contributor.authorCrespilho, F. N.
dc.contributor.authorZucolotto, V
dc.contributor.authorSiqueira, JR
dc.contributor.authorConstantino, CJL
dc.contributor.authorNart, F. C.
dc.contributor.authorOliveira, O. N.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:29:07Z
dc.date.available2014-05-20T15:29:07Z
dc.date.issued2005-07-15
dc.description.abstractHumic acids (HAs), naturally occurring biomacromolecules, were incorporated into nanostructured polymeric films using the layer-by-layer (LbL) technique, in which HA layers were alternated with layers of poly(allylamine hydrochloride) (PAH). Atomic force microscopy (AFM) revealed very smooth films, with mean roughness varying from 0.89 to 1.19 nm for films containing 5 and 15 PAH/HA bilayers, respectively. The films displayed electroactivity, with the presence of only one reduction peak at ca. 0.675 V (vs Ag/AgCl). Such a well-defined electroactivity allowed the films to be used as highly sensitive pesticide sensors, with detection of pentachlorophenol (PCP) in solutions at concentrations as low as 10(-9) mol L(-1).en
dc.description.affiliationUniv São Paulo, IFSC, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv São Paulo, IQSC, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, FCT, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, FCT, BR-19060900 Presidente Prudente, SP, Brazil
dc.format.extent5385-5389
dc.identifierhttp://dx.doi.org/10.1021/es050552n
dc.identifier.citationEnvironmental Science & Technology. Washington: Amer Chemical Soc, v. 39, n. 14, p. 5385-5389, 2005.
dc.identifier.doi10.1021/es050552n
dc.identifier.issn0013-936X
dc.identifier.urihttp://hdl.handle.net/11449/38773
dc.identifier.wosWOS:000230536200041
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofEnvironmental Science & Technology
dc.relation.ispartofjcr6.653
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleImmobilization of humic acid in nanostructured layer-by-layer films for sensing applicationsen
dc.typeArtigo
dcterms.licensehttp://pubs.acs.org/paragonplus/copyright/jpa_form_a.pdf
dcterms.rightsHolderAmer Chemical Soc
dspace.entity.typePublication
unesp.author.orcid0000-0003-4830-652X[1]
unesp.author.orcid0000-0003-4307-3077[2]
unesp.author.orcid0000-0002-5399-5860[6]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências e Tecnologia, Presidente Prudentept
unesp.departmentFísica, Química e Biologia - FCTpt

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Presidente Prudente - FCT - Faculdade de Ciências e Tecnologia