Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.materresbull.2017.04.037 http://hdl.handle.net/11449/169692 |
Resumo: | Combined experimental and theoretical investigations were conducted on the electronic structure, as well as the optical and gas-sensing properties of mixed-phase CaCu3Ti4O12/CaTiO3 (CCTO/CTO) composites, which were synthesized by a solid-state reaction using various milling durations. Our results revealed that these CCTO/CTO composites have a broad photoluminescence (PL) emission band located at 450 nm, which is strongly influenced by the milling process duration. Scanning electron microscopy images confirmed that the use of longer milling durations favored the formation of pores and increased the active surface area of the CCTO/CTO thick films. The thick films were prepared using the screen-printing technique, and hence, could be structured for gas-sensing applications. Our theoretical findings may further elucidate the electronic structure associated with the interfacial band alignment (type I-straddling gap) of the CCTO/CTO composite systems. |
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Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 compositesCCTO/CTO compositesDFTGas sensingPhotoluminescenceScreen-printing techniqueCombined experimental and theoretical investigations were conducted on the electronic structure, as well as the optical and gas-sensing properties of mixed-phase CaCu3Ti4O12/CaTiO3 (CCTO/CTO) composites, which were synthesized by a solid-state reaction using various milling durations. Our results revealed that these CCTO/CTO composites have a broad photoluminescence (PL) emission band located at 450 nm, which is strongly influenced by the milling process duration. Scanning electron microscopy images confirmed that the use of longer milling durations favored the formation of pores and increased the active surface area of the CCTO/CTO thick films. The thick films were prepared using the screen-printing technique, and hence, could be structured for gas-sensing applications. Our theoretical findings may further elucidate the electronic structure associated with the interfacial band alignment (type I-straddling gap) of the CCTO/CTO composite systems.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)State University of São Paulo Chemistry Institute, rua Prof. Francisco Degni 55State University of São Paulo Engeenering Collegue of Guaratinguetá, rua Ariberto Pereira da CunhaUniversity of Mar del Plata Institute of Materials Science and Technology, J.B. Justo 4302, Mar del PlataFederal Institute of Education Science and Technology of Sertão PernambucanoModeling and Molecular Simulations Group São Paulo State University UNESPFederal Technological University of Paraná Laboratory of Nanotechnology and Computational Chemistry, avenida dos Pioneiros 3131Modeling and Molecular Simulations Group São Paulo State University UNESPCNPq: 573636/2008-7Universidade de São Paulo (USP)Institute of Materials Science and TechnologyScience and Technology of Sertão PernambucanoUniversidade Estadual Paulista (Unesp)Laboratory of Nanotechnology and Computational ChemistryOliveira, L. H.Ramírez, M. A.Ponce, M. A.Ramajo, L. A.Albuquerque, A. R.Sambrano, J. R. [UNESP]Longo, E.Castro, M. S.La Porta, F. A.2018-12-11T16:47:11Z2018-12-11T16:47:11Z2017-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article47-55application/pdfhttp://dx.doi.org/10.1016/j.materresbull.2017.04.037Materials Research Bulletin, v. 93, p. 47-55.0025-5408http://hdl.handle.net/11449/16969210.1016/j.materresbull.2017.04.0372-s2.0-850188264402-s2.0-85018826440.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Research Bulletin0,746info:eu-repo/semantics/openAccess2023-11-18T06:16:00Zoai:repositorio.unesp.br:11449/169692Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:05:10.441444Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
title |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
spellingShingle |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites Oliveira, L. H. CCTO/CTO composites DFT Gas sensing Photoluminescence Screen-printing technique |
title_short |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
title_full |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
title_fullStr |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
title_full_unstemmed |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
title_sort |
Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites |
author |
Oliveira, L. H. |
author_facet |
Oliveira, L. H. Ramírez, M. A. Ponce, M. A. Ramajo, L. A. Albuquerque, A. R. Sambrano, J. R. [UNESP] Longo, E. Castro, M. S. La Porta, F. A. |
author_role |
author |
author2 |
Ramírez, M. A. Ponce, M. A. Ramajo, L. A. Albuquerque, A. R. Sambrano, J. R. [UNESP] Longo, E. Castro, M. S. La Porta, F. A. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Institute of Materials Science and Technology Science and Technology of Sertão Pernambucano Universidade Estadual Paulista (Unesp) Laboratory of Nanotechnology and Computational Chemistry |
dc.contributor.author.fl_str_mv |
Oliveira, L. H. Ramírez, M. A. Ponce, M. A. Ramajo, L. A. Albuquerque, A. R. Sambrano, J. R. [UNESP] Longo, E. Castro, M. S. La Porta, F. A. |
dc.subject.por.fl_str_mv |
CCTO/CTO composites DFT Gas sensing Photoluminescence Screen-printing technique |
topic |
CCTO/CTO composites DFT Gas sensing Photoluminescence Screen-printing technique |
description |
Combined experimental and theoretical investigations were conducted on the electronic structure, as well as the optical and gas-sensing properties of mixed-phase CaCu3Ti4O12/CaTiO3 (CCTO/CTO) composites, which were synthesized by a solid-state reaction using various milling durations. Our results revealed that these CCTO/CTO composites have a broad photoluminescence (PL) emission band located at 450 nm, which is strongly influenced by the milling process duration. Scanning electron microscopy images confirmed that the use of longer milling durations favored the formation of pores and increased the active surface area of the CCTO/CTO thick films. The thick films were prepared using the screen-printing technique, and hence, could be structured for gas-sensing applications. Our theoretical findings may further elucidate the electronic structure associated with the interfacial band alignment (type I-straddling gap) of the CCTO/CTO composite systems. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-09-01 2018-12-11T16:47:11Z 2018-12-11T16:47:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.materresbull.2017.04.037 Materials Research Bulletin, v. 93, p. 47-55. 0025-5408 http://hdl.handle.net/11449/169692 10.1016/j.materresbull.2017.04.037 2-s2.0-85018826440 2-s2.0-85018826440.pdf |
url |
http://dx.doi.org/10.1016/j.materresbull.2017.04.037 http://hdl.handle.net/11449/169692 |
identifier_str_mv |
Materials Research Bulletin, v. 93, p. 47-55. 0025-5408 10.1016/j.materresbull.2017.04.037 2-s2.0-85018826440 2-s2.0-85018826440.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Research Bulletin 0,746 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
47-55 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808128892315107328 |