Hybrid layer-by-layer (LbL) films of polyaniline, graphene oxide and zinc oxide to detect ammonia

dc.contributor.authorAndre, Rafaela S.
dc.contributor.authorShimizu, Flávio M.
dc.contributor.authorMiyazaki, Celina M.
dc.contributor.authorRiul, Antonio
dc.contributor.authorManzani, Danilo [UNESP]
dc.contributor.authorRibeiro, Sidney J.L. [UNESP]
dc.contributor.authorOliveira, Osvaldo N.
dc.contributor.authorMattoso, Luiz H.C.
dc.contributor.authorCorrea, Daniel S.
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:29:48Z
dc.date.available2018-12-11T17:29:48Z
dc.date.issued2017-01-01
dc.description.abstractReliable gas sensors operating at room temperature are in demand for monitoring the environment for hazardous pollutants, such as ammonia (NH3) gas that may become toxic to humans and animals above a threshold concentration. In this paper we report on the combination of three materials, namely polyaniline (PANI), graphene oxide (GO) and zinc oxide (ZnO), to produce hybrid layer-by-layer (LbL) films used for sensing NH3 with impedance spectroscopy measurements. The deposition of tetralayered PANI/GO/PANI/ZnO LbL films was confirmed with UV–vis. absorption and Raman spectroscopies, while atomic force microscopy (AFM) served to investigate film morphology. Exposure of these LbL films to NH3 caused film roughness to vary, in an effect that depended on the number of tetralayers. Because of synergy in the materials properties, the films with 3 tetralayers were found to be the most adequate for detecting NH3 in the range from 25 ppm to 500 ppm with a response time of 30 s. These figures of merit are adequate for monitoring working environments regarding gas exposure, and highlight the usefulness of the control of film architecture provided by the LbL technique.en
dc.description.affiliationNational Laboratory for Nanotechnology in Agribusiness (LNNA) Embrapa Instrumentation
dc.description.affiliationCenter for Exact Sciences and Technology Department of Chemistry Federal University of São Carlos (UFSCar)
dc.description.affiliationSão Carlos Institute of Physics (IFSC) University of São Paulo (USP), P.O. Box 369
dc.description.affiliationCCTS Federal University of São Carlos (UFSCar)
dc.description.affiliationInstitute of Physics Gleb Wataghin Unicamp
dc.description.affiliationInstitute of Chemistry São Paulo State University (UNESP)
dc.description.affiliationUnespInstitute of Chemistry São Paulo State University (UNESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipEmpresa Brasileira de Pesquisa Agropecuária
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 141894/2013-0
dc.description.sponsorshipIdFAPESP: 2012/15543-7
dc.description.sponsorshipIdFAPESP: 2012/23880-3
dc.description.sponsorshipIdFAPESP: 2013/14262-7
dc.description.sponsorshipIdFAPESP: 2014/16789-5
dc.description.sponsorshipIdCNPq: 502391/2014-6
dc.format.extent795-801
dc.identifierhttp://dx.doi.org/10.1016/j.snb.2016.07.099
dc.identifier.citationSensors and Actuators, B: Chemical, v. 238, p. 795-801.
dc.identifier.doi10.1016/j.snb.2016.07.099
dc.identifier.file2-s2.0-84990242939.pdf
dc.identifier.issn0925-4005
dc.identifier.scopus2-s2.0-84990242939
dc.identifier.urihttp://hdl.handle.net/11449/178328
dc.language.isoeng
dc.relation.ispartofSensors and Actuators, B: Chemical
dc.relation.ispartofsjr1,406
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAmmonia sensor
dc.subjectGraphene oxide
dc.subjectImpedance spectroscopy
dc.subjectNanostructured film
dc.subjectPolyaniline
dc.titleHybrid layer-by-layer (LbL) films of polyaniline, graphene oxide and zinc oxide to detect ammoniaen
dc.typeArtigo
unesp.author.orcid0000-0002-5592-0627 0000-0002-5592-0627[9]

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