Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.techconnectworld.com/Nanotech2012/a.html?i=1531 http://hdl.handle.net/11449/73504 |
Resumo: | In this work, (Ca 1-xCu x)TiO 3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140°C for 32 min. XRD patterns (Fig. 1), Rietveld refinement and FT-Raman spectroscopy indicated that these crystals present orthorhombic structure Pbnm. Micro-Raman and XANES spectra suggested that the substitution of Ca by Cu in A-site promoted a displacement of the [TiO6]-[TiO6] clusters adjacent from its symmetric center, which leads distortions on the [CaO 12] clusters neighboring and consequently cause the strains into the CaTiO3 lattice. FE-SEM images showed that these crystals have an irregular shape as cube like probably indicating an Ostwald-ripening and self-assemble as dominant mechanisms to crystals growth. The powders presented an intense PL blue-emission. |
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Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal methodChemical synthesisLuminescenceMicrocrystalsOptical materialsXANESBlue-emissionDominant mechanismFT- Raman spectroscopyIrregular shapeMicro-RamanMicrowave-hydrothermal methodsOrthorhombic structuresPhotoluminescence propertiesSelf-assembleStructural refinementTiOXANES spectraXRD patternsCalciumCrystal growthCrystal structureExhibitionsFilmsNanotechnologyOstwald ripeningPerovskiteRaman spectroscopyRietveld refinementNanocomposite filmsIn this work, (Ca 1-xCu x)TiO 3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140°C for 32 min. XRD patterns (Fig. 1), Rietveld refinement and FT-Raman spectroscopy indicated that these crystals present orthorhombic structure Pbnm. Micro-Raman and XANES spectra suggested that the substitution of Ca by Cu in A-site promoted a displacement of the [TiO6]-[TiO6] clusters adjacent from its symmetric center, which leads distortions on the [CaO 12] clusters neighboring and consequently cause the strains into the CaTiO3 lattice. FE-SEM images showed that these crystals have an irregular shape as cube like probably indicating an Ostwald-ripening and self-assemble as dominant mechanisms to crystals growth. The powders presented an intense PL blue-emission.UFSCar, São Carlos, SPInstituto de Química UNESP, Araraquara, SPInstituto de Química UNESP, Araraquara, SPUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Oliveira, Larissa H.De Moura, Ana P. [UNESP]Cavalcante, Laécio S. [UNESP]Antonio, Selma G. [UNESP]Longo, Elson [UNESP]Varela, José Arana [UNESP]2014-05-27T11:26:56Z2014-05-27T11:26:56Z2012-08-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject394-397http://www.techconnectworld.com/Nanotech2012/a.html?i=1531Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012, p. 394-397.http://hdl.handle.net/11449/735042-s2.0-84865015432Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012info:eu-repo/semantics/openAccess2021-10-23T09:13:35Zoai:repositorio.unesp.br:11449/73504Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T09:13:35Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
title |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
spellingShingle |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method Oliveira, Larissa H. Chemical synthesis Luminescence Microcrystals Optical materials XANES Blue-emission Dominant mechanism FT- Raman spectroscopy Irregular shape Micro-Raman Microwave-hydrothermal methods Orthorhombic structures Photoluminescence properties Self-assemble Structural refinement TiO XANES spectra XRD patterns Calcium Crystal growth Crystal structure Exhibitions Films Nanotechnology Ostwald ripening Perovskite Raman spectroscopy Rietveld refinement Nanocomposite films |
title_short |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
title_full |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
title_fullStr |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
title_full_unstemmed |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
title_sort |
Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method |
author |
Oliveira, Larissa H. |
author_facet |
Oliveira, Larissa H. De Moura, Ana P. [UNESP] Cavalcante, Laécio S. [UNESP] Antonio, Selma G. [UNESP] Longo, Elson [UNESP] Varela, José Arana [UNESP] |
author_role |
author |
author2 |
De Moura, Ana P. [UNESP] Cavalcante, Laécio S. [UNESP] Antonio, Selma G. [UNESP] Longo, Elson [UNESP] Varela, José Arana [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Oliveira, Larissa H. De Moura, Ana P. [UNESP] Cavalcante, Laécio S. [UNESP] Antonio, Selma G. [UNESP] Longo, Elson [UNESP] Varela, José Arana [UNESP] |
dc.subject.por.fl_str_mv |
Chemical synthesis Luminescence Microcrystals Optical materials XANES Blue-emission Dominant mechanism FT- Raman spectroscopy Irregular shape Micro-Raman Microwave-hydrothermal methods Orthorhombic structures Photoluminescence properties Self-assemble Structural refinement TiO XANES spectra XRD patterns Calcium Crystal growth Crystal structure Exhibitions Films Nanotechnology Ostwald ripening Perovskite Raman spectroscopy Rietveld refinement Nanocomposite films |
topic |
Chemical synthesis Luminescence Microcrystals Optical materials XANES Blue-emission Dominant mechanism FT- Raman spectroscopy Irregular shape Micro-Raman Microwave-hydrothermal methods Orthorhombic structures Photoluminescence properties Self-assemble Structural refinement TiO XANES spectra XRD patterns Calcium Crystal growth Crystal structure Exhibitions Films Nanotechnology Ostwald ripening Perovskite Raman spectroscopy Rietveld refinement Nanocomposite films |
description |
In this work, (Ca 1-xCu x)TiO 3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140°C for 32 min. XRD patterns (Fig. 1), Rietveld refinement and FT-Raman spectroscopy indicated that these crystals present orthorhombic structure Pbnm. Micro-Raman and XANES spectra suggested that the substitution of Ca by Cu in A-site promoted a displacement of the [TiO6]-[TiO6] clusters adjacent from its symmetric center, which leads distortions on the [CaO 12] clusters neighboring and consequently cause the strains into the CaTiO3 lattice. FE-SEM images showed that these crystals have an irregular shape as cube like probably indicating an Ostwald-ripening and self-assemble as dominant mechanisms to crystals growth. The powders presented an intense PL blue-emission. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-08-20 2014-05-27T11:26:56Z 2014-05-27T11:26:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.techconnectworld.com/Nanotech2012/a.html?i=1531 Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012, p. 394-397. http://hdl.handle.net/11449/73504 2-s2.0-84865015432 |
url |
http://www.techconnectworld.com/Nanotech2012/a.html?i=1531 http://hdl.handle.net/11449/73504 |
identifier_str_mv |
Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012, p. 394-397. 2-s2.0-84865015432 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
394-397 |
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 |
|
_version_ |
1799964464775168000 |