Novel gas sensor with dual response under CO(g) exposure: Optical and electrical stimuli

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dc.contributor.authorRocha, L. S. R. [UNESP]
dc.contributor.authorCilense, M. [UNESP]
dc.contributor.authorPonce, M. A.
dc.contributor.authorAldao, C. M.
dc.contributor.authorOliveira, L. L. [UNESP]
dc.contributor.authorLongo, E. [UNESP]
dc.contributor.authorSimoes, A. Z. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInst Mat Sci & Technol Invest INTEMA
dc.date.accessioned2018-11-29T13:28:30Z
dc.date.available2018-11-29T13:28:30Z
dc.date.issued2018-05-01
dc.description.abstractIn this work, a lanthanum (La) doped ceria (CeO2) film, which depicted a dual gas sensing response (electric and optical) for CO(g) detection, was obtained by the microwave-assisted hydrothermal (HAM) synthesis and deposited by the screen-printing technique, in order to prevent deaths by intoxication with this life-threatening gas. An electric response under CO(g) exposure was obtained, along with an extremely fast optical response for a temperature of 380 degrees C, associated with Ce+4 reduction and vacancy generation. A direct optical gap was found to be around 2.31 eV from UV-Vis results, which corresponds to a transition from valence band to 4f states. Due to the anomalous electron configuration of cerium atoms with 4f electrons in its reduced state, they are likely to present an electric conduction based on the small polaron theory with a hopping mechanism responsible for its dual sensing response with a complete reversible behaviour. (C) 2017 Elsevier B.V. All rights reserved.en
dc.description.affiliationSao Paulo State Univ UNESP, Sch Engn, Ave Dr Ariberto Pereira da Cunha 333, BR-12516410 Sao Paulo, Brazil
dc.description.affiliationSao Paulo State Univ UNESP, Inst Chem, BR-14801907 Sao Paulo, Brazil
dc.description.affiliationInst Mat Sci & Technol Invest INTEMA, Juan B Justo 4302, RA-7600 Mar Del Plata, Buenos Aires, Argentina
dc.description.affiliationUnespSao Paulo State Univ UNESP, Sch Engn, Ave Dr Ariberto Pereira da Cunha 333, BR-12516410 Sao Paulo, Brazil
dc.description.affiliationUnespSao Paulo State Univ UNESP, Inst Chem, BR-14801907 Sao Paulo, 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.sponsorshipIdCNPq: PVE 401503/2014-3
dc.description.sponsorshipIdFAPESP: CEPID 2013/07296-2
dc.format.extent280-288
dc.identifierhttp://dx.doi.org/10.1016/j.physh.2017.10.083
dc.identifier.citationPhysica B-condensed Matter. Amsterdam: Elsevier Science Bv, v. 536, p. 280-288, 2018.
dc.identifier.doi10.1016/j.physh.2017.10.083
dc.identifier.issn0921-4526
dc.identifier.urihttp://hdl.handle.net/11449/166117
dc.identifier.wosWOS:000431075600063
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofPhysica B-condensed Matter
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectGas sensors
dc.subjectThin films
dc.subjectCerium dioxide
dc.subjectLanthanum
dc.subjectCarbon monoxide
dc.subjectDual response
dc.titleNovel gas sensor with dual response under CO(g) exposure: Optical and electrical stimulien
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes3573363486614904[7]
unesp.author.orcid0000-0003-2535-2187[7]

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