Analysis of the Al-PANI interfaces by complex impedance spectroscopy

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dc.contributor.authorCazati, T.
dc.contributor.authorMaciel, A. C.
dc.contributor.authorEiras, C.
dc.contributor.authorConstantino, C. J. L. [UNESP]
dc.contributor.authorda Cunha, H. N.
dc.contributor.authorBianchi, R. F.
dc.contributor.institutionUniversidade Federal de Ouro Preto (UFOP)
dc.contributor.institutionInst Fis São Carlos
dc.contributor.institutionUniversidade Federal do Piauí (UFPI)
dc.contributor.institutionBIOTEC
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:23:13Z
dc.date.available2014-05-20T13:23:13Z
dc.date.issued2011-04-27
dc.description.abstractThis paper describes a new approach to improve the analysis of surface modification of free-standing semiconducting polymer films emerged from the interfacial interaction between aluminium electrode and HCl-doped polyaniline (PANI) films. The Al-PANI-Al structure was prepared by casting PANI/N-methyl-2-pirrolidone onto a glass substrate and then being sandwiched between Al electrodes after immersion in HCl aqueous solutions and then dried. The Al-polymer interface was investigated by means of complex impedance spectroscopy in the frequency domain on HCl-doped PANI films. The dc conductivity of the interfacial layer between the Al and PANI surface exposed to air during the film processing is higher than those obtained with Al and PANI surface exposed to glass. Raman spectroscopy data confirm this evidence. Here, it is speculated that some dissociated chlorine and aluminium-salt-containing species have contributed as ionic carriers increasing the electrical conductivity of the polymer bulk, and by the formation of an Al(2)O(3) thin layer between the Al and PANI films. An equivalent circuit model considering the influence of Al-PANI reactions on the electrical behaviour of the Al-PANI-Al structure was proposed. Additionally, it was demonstrated that the impedance spectroscopy facilitates the identification of interface modification in the Al-PANI-Al films.en
dc.description.affiliationUniv Fed Ouro Preto, Dept Fis, Ouro Preto, MG, Brazil
dc.description.affiliationInst Fis São Carlos, São Carlos, SP, Brazil
dc.description.affiliationUniv Fed Piaui, Dept Quim, Teresina, PI, Brazil
dc.description.affiliationBIOTEC, Nucleo Pesquisa Biodiversidade & Biotecnol, Parnaiba, PI, Brazil
dc.description.affiliationUNESP, DFQB, Fac Ciencias & Tecnol, Presidente Prudente, SP, Brazil
dc.description.affiliationUniv Fed Piaui, Dept Fis, Teresina, PI, Brazil
dc.description.affiliationUnespUNESP, DFQB, Fac Ciencias & Tecnol, Presidente Prudente, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Piauí (FAPEPI)
dc.format.extent6
dc.identifierhttp://dx.doi.org/10.1088/0022-3727/44/16/165301
dc.identifier.citationJournal of Physics D-applied Physics. Bristol: Iop Publishing Ltd, v. 44, n. 16, p. 6, 2011.
dc.identifier.doi10.1088/0022-3727/44/16/165301
dc.identifier.issn0022-3727
dc.identifier.urihttp://hdl.handle.net/11449/6967
dc.identifier.wosWOS:000289278500009
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofJournal of Physics D: Applied Physics
dc.relation.ispartofjcr2.373
dc.relation.ispartofsjr0,717
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleAnalysis of the Al-PANI interfaces by complex impedance spectroscopyen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd
unesp.author.lattes6118325967319836[4]
unesp.author.orcid0000-0002-5921-3161[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept
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Artigos - Física, Química e Biologia - FCT