Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 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://hdl.handle.net/11449/197453 |
Resumo: | In this work, (Ca1-xCux)TiO3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140 degrees 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 [CaO12] 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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Repositório Institucional da UNESP |
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Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal methodOptical materialsChemical synthesisXANESLuminescencemicrocrystalsIn this work, (Ca1-xCux)TiO3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140 degrees 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 [CaO12] 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.Univ Fed Sao Carlos, Sao Carlos, SP, BrazilUNESP, Inst Quim, Araraquara, SP, BrazilUNESP, Inst Quim, Araraquara, SP, BrazilCrc Press-taylor & Francis GroupUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Oliveira, Larissa H.Moura, Ana P. de [UNESP]Cavalcante, Laecio S. [UNESP]Antonio, Selma G. [UNESP]Longo, Elson [UNESP]Varela, Jose A.Laudon, M.Romanowicz, B.2020-12-10T22:32:02Z2020-12-10T22:32:02Z2012-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject394-397Nanotechnology 2012, Vol 1: Advanced Materials, Cnts, Particles, Films And Composites. Boca Raton: Crc Press-taylor & Francis Group, p. 394-397, 2012.http://hdl.handle.net/11449/197453WOS:000391247800104Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNanotechnology 2012, Vol 1: Advanced Materials, Cnts, Particles, Films And Compositesinfo:eu-repo/semantics/openAccess2021-10-23T14:47:59Zoai:repositorio.unesp.br:11449/197453Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T14:47:59Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
title |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
spellingShingle |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method Oliveira, Larissa H. Optical materials Chemical synthesis XANES Luminescence microcrystals |
title_short |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
title_full |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
title_fullStr |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
title_full_unstemmed |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
title_sort |
Structural refinement and photoluminescence properties of cube-like (Ca1-xCux)TiO3 crystals synthesized by the microwave-hydrothermal method |
author |
Oliveira, Larissa H. |
author_facet |
Oliveira, Larissa H. Moura, Ana P. de [UNESP] Cavalcante, Laecio S. [UNESP] Antonio, Selma G. [UNESP] Longo, Elson [UNESP] Varela, Jose A. Laudon, M. Romanowicz, B. |
author_role |
author |
author2 |
Moura, Ana P. de [UNESP] Cavalcante, Laecio S. [UNESP] Antonio, Selma G. [UNESP] Longo, Elson [UNESP] Varela, Jose A. Laudon, M. Romanowicz, B. |
author2_role |
author author 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. Moura, Ana P. de [UNESP] Cavalcante, Laecio S. [UNESP] Antonio, Selma G. [UNESP] Longo, Elson [UNESP] Varela, Jose A. Laudon, M. Romanowicz, B. |
dc.subject.por.fl_str_mv |
Optical materials Chemical synthesis XANES Luminescence microcrystals |
topic |
Optical materials Chemical synthesis XANES Luminescence microcrystals |
description |
In this work, (Ca1-xCux)TiO3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140 degrees 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 [CaO12] 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 |
2012-01-01 2020-12-10T22:32:02Z 2020-12-10T22:32:02Z |
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 |
Nanotechnology 2012, Vol 1: Advanced Materials, Cnts, Particles, Films And Composites. Boca Raton: Crc Press-taylor & Francis Group, p. 394-397, 2012. http://hdl.handle.net/11449/197453 WOS:000391247800104 |
identifier_str_mv |
Nanotechnology 2012, Vol 1: Advanced Materials, Cnts, Particles, Films And Composites. Boca Raton: Crc Press-taylor & Francis Group, p. 394-397, 2012. WOS:000391247800104 |
url |
http://hdl.handle.net/11449/197453 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Nanotechnology 2012, Vol 1: Advanced Materials, Cnts, Particles, Films And Composites |
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.publisher.none.fl_str_mv |
Crc Press-taylor & Francis Group |
publisher.none.fl_str_mv |
Crc Press-taylor & Francis Group |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1797789682436669440 |