Nanostructured Eu-doped Ceria for humidity sensing: A morphological perspective

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorUniversity of Ferrara (UNIFE)-
Autor(es): dc.contributorUniversity of Mar del Plata and National Research Council (CONICET)-
Autor(es): dc.contributorPhysics and Engineering Research Center CIFICEN (UNCPBA-CICPBA-CONICET)-
Autor(es): dc.creatorOrtega, P. P.-
Autor(es): dc.creatorGherardi, S.-
Autor(es): dc.creatorSpagnoli, E.-
Autor(es): dc.creatorFabbri, B.-
Autor(es): dc.creatorAstolfi, M.-
Autor(es): dc.creatorZonta, G.-
Autor(es): dc.creatorLandini, N.-
Autor(es): dc.creatorMalagù, C.-
Autor(es): dc.creatorAldao, C. M.-
Autor(es): dc.creatorPonce, M. A.-
Autor(es): dc.creatorSimões, A. Z.-
Autor(es): dc.creatorLongo, E.-
Data de aceite: dc.date.accessioned2025-08-21T16:13:37Z-
Data de disponibilização: dc.date.available2025-08-21T16:13:37Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-07-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2024.160047-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/304330-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/304330-
Descrição: dc.descriptionHumidity is a ubiquitous variable with severe impacts on physical and chemical processes, thus demanding precise measuring and monitoring. As an alternative to bulky analytical instrumentations, chemoresistive gas sensors are promising candidates for humidity sensing devices. Herein, we investigated how the morphology of Eu-doped CeO2 nanostructures influenced their humidity detection. Nanostructures with spherical, rod, polyhedron, and cube morphologies were synthesized using the microwave-assisted hydrothermal method. XRD and Raman spectroscopy analyses revealed that the samples were crystalline and without secondary phases, displaying the highest level of structural disorders for nanorods. HRTEM analysis showed that the exposed facets depended on the morphology and that the most reactive surface (composed of (2 0 0) planes) was predominant in the nanorods and nanocubes. Thick films based on the nanostructures were prepared via the screen-printing technique, obtaining porous layers without discontinuities. At 55% RH, the response of the sensor based on Eu-doped Ceria nanorods was about 150% and 60% higher than of the Eu-doped nanopolyhedra and undoped nanoparticles, respectively, which was assigned to their reactive facets, higher specific surface area, and higher level of structural defects. The sensing mechanism was attributed to electronic conduction resulting from the adsorption of water molecules on the surface of the nanostructures.-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Engineering of Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha 333, São Paulo-
Descrição: dc.descriptionFederal University of São Carlos (UFSCar), São Paulo-
Descrição: dc.descriptionUniversity of Ferrara (UNIFE) Department of Physics and Earth Sciences, Via Saragat 1-
Descrição: dc.descriptionInstitute of Scientific and Technological Research in Electronics (ICYTE) University of Mar del Plata and National Research Council (CONICET), Juan B. Justo 4302-
Descrição: dc.descriptionPhysics and Engineering Research Center CIFICEN (UNCPBA-CICPBA-CONICET), Tandil B7000GHG, and UNMDP Mar del Plata-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Engineering of Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha 333, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationApplied Surface Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCerium dioxide-
Palavras-chave: dc.subjectGas sensors-
Palavras-chave: dc.subjectHumidity-
Palavras-chave: dc.subjectMorphology-
Palavras-chave: dc.subjectNanostructures-
Título: dc.titleNanostructured Eu-doped Ceria for humidity sensing: A morphological perspective-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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