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Publicação:
Local Structure and Surface Properties of CoxZn1-xO Thin Films for Ozone Gas Sensing

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dc.contributor.authorCatto, Ariadne C.
dc.contributor.authorSilva, Luis F. da [UNESP]
dc.contributor.authorBernardi, Maria Ines B.
dc.contributor.authorBernardini, Sandrine
dc.contributor.authorAguir, Khalifa
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorMastelaro, Valmor R.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAix Marseille Univ
dc.date.accessioned2018-11-27T21:47:43Z
dc.date.available2018-11-27T21:47:43Z
dc.date.issued2016-10-05
dc.description.abstractA detailed study of the structural, surface, and gas-sensing properties of nanostructured CoxZn1-xO films is presented. X-ray diffraction (XRD) analysis revealed a decrease in the crystallization degree with increasing Co content. The X-ray absorption near-edge structure (XANES) and X-ray photoelectron spectroscopies (XPS) revealed that the Co2+ ions preferentially occupied the Zn2+ sites and that the oxygen vacancy concentration increased as the amount of cobalt increased. Electrical measurements showed that the Co dopants not only enhanced the sensor response at low ozone levels (ca. 42 ppb) but also led to a decrease in the operating temperature and improved selectivity. The enhancement in the gas-sensing properties was attributed to the presence of oxygen vacancies, which facilitated ozone adsorption.en
dc.description.affiliationUniv Sao Paulo, Inst Phys Sao Carlos, Ave Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP, Brazil
dc.description.affiliationSao Paulo State Univ, Inst Chem, POB 355, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationAix Marseille Univ, CNRS, IM2NP 7334, Ave EN Neimen, F-13397 Marseille, France
dc.description.affiliationUnespSao Paulo State Univ, Inst Chem, POB 355, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipBrazilian Nanotechnology National Laboratory, LNNano, Campinas, SP, Brazil
dc.description.sponsorshipIdFAPESP: 12/15170-6
dc.description.sponsorshipIdFAPESP: 13/09573-3
dc.description.sponsorshipIdFAPESP: 13/07296-2
dc.description.sponsorshipIdFAPESP: 15/ 20124-1
dc.description.sponsorshipIdBrazilian Nanotechnology National Laboratory, LNNano, Campinas, SP, Brazil: XPS-18304
dc.description.sponsorshipIdBrazilian Nanotechnology National Laboratory, LNNano, Campinas, SP, Brazil: LMF-18580
dc.format.extent26066-26072
dc.identifierhttp://dx.doi.org/10.1021/acsami.6b08589
dc.identifier.citationAcs Applied Materials & Interfaces. Washington: Amer Chemical Soc, v. 8, n. 39, p. 26066-26072, 2016.
dc.identifier.doi10.1021/acsami.6b08589
dc.identifier.issn1944-8244
dc.identifier.urihttp://hdl.handle.net/11449/165332
dc.identifier.wosWOS:000384951800049
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofAcs Applied Materials & Interfaces
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectzinc oxide
dc.subjectcobalt
dc.subjectXANES spectroscopy
dc.subjectXPS
dc.subjectgas sensor
dc.subjectozone
dc.titleLocal Structure and Surface Properties of CoxZn1-xO Thin Films for Ozone Gas Sensingen
dc.typeArtigo
dcterms.rightsHolderAmer Chemical Soc
dspace.entity.typePublication
unesp.author.orcid0000-0001-8062-7791[6]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentBioquímica e Tecnologia - IQpt

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Araraquara - IQAR - Instituto de Química