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Sol-gel synthesis of mesoporous CaCu3Ti4O12 thin films and their gas sensing response

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dc.contributor.authorParra, R.
dc.contributor.authorSavu, R. [UNESP]
dc.contributor.authorRamajo, L. A.
dc.contributor.authorPonce, M. A.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorCastro, M. S.
dc.contributor.authorBueno, Paulo Roberto [UNESP]
dc.contributor.authorJoanni, E. [UNESP]
dc.contributor.institutionUNMdP
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCtr Tecnol Informação Renato Archer
dc.date.accessioned2014-05-20T15:33:15Z
dc.date.available2014-05-20T15:33:15Z
dc.date.issued2010-06-01
dc.description.abstractA new sol-gel synthesis procedure of stable calcium copper titanate (CaCu3Ti4O12-CCTO) precursor sols for the fabrication of porous films was developed The composition of the sot was selected in order to avoid the precipitation of undesired phases, ethanol was used as solvent, acetic acid as modifier and poly(ethyleneglycol) as a linker agent Films deposited by spin-coating onto oxidized silicon substrates were annealed at 700 degrees C The main phase present in the samples, as detected by X-ray diffraction and Raman spectroscopy, was CaCu3Ti4O12 Scanning electron microscopy analysis showed that mesoporous structures, with thicknesses between 200 and 400 nm, were developed as a result of the processing conditions The films were tested regarding their sensibility towards oxygen and nitrogen at atmospheric pressure using working temperatures from 200 to 290 degrees C. The samples exhibited n-type conductivity, high sensitivity and short response times. These characteristics indicate that CCTO mesoporous structures obtained by sol-gel are suitable for application in gas sensing (C) 2010 Elsevier Inc All rights reserveden
dc.description.affiliationUNMdP, CONICET, Inst Invest Ciência & Tecnol Mat INTEMA, Mar Del Plata, Buenos Aires, Argentina
dc.description.affiliationUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationCtr Tecnol Informação Renato Archer, BR-13069901 Campinas, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
dc.description.sponsorshipSeCyT (Argentina)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1209-1214
dc.identifierhttp://dx.doi.org/10.1016/j.jssc.2010.03.033
dc.identifier.citationJournal of Solid State Chemistry. San Diego: Academic Press Inc. Elsevier B.V., v. 183, n. 6, p. 1209-1214, 2010.
dc.identifier.doi10.1016/j.jssc.2010.03.033
dc.identifier.issn0022-4596
dc.identifier.lattes0477045906733254
dc.identifier.orcid0000-0003-2827-0208
dc.identifier.urihttp://hdl.handle.net/11449/41934
dc.identifier.wosWOS:000278750100001
dc.language.isoeng
dc.publisherAcademic Press Inc. Elsevier B.V.
dc.relation.ispartofJournal of Solid State Chemistry
dc.relation.ispartofjcr2.179
dc.relation.ispartofsjr0,632
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCaCu3Ti4O12en
dc.subjectMesoporous filmsen
dc.subjectGas sensorsen
dc.titleSol-gel synthesis of mesoporous CaCu3Ti4O12 thin films and their gas sensing responseen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderAcademic Press Inc. Elsevier B.V.
dspace.entity.typePublication
unesp.author.lattes0477045906733254[7]
unesp.author.orcid0000-0003-2827-0208[7]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentFísico-Química - IQARpt

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Araraquara - IQAR - Instituto de Química