Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal
Main Author: | |
---|---|
Publication Date: | 2009 |
Other Authors: | , , , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://dx.doi.org/10.1007/s11671-009-9407-6 http://hdl.handle.net/11449/42403 |
Summary: | In this letter, we report on the obtention of hafnium oxide (HfO2) nanostructures by the microwave-hydrothermal method. These nanostructures were analyzed by X-ray diffraction (XRD), field-emission gum scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDXS), ultraviolet-visible (UV-vis) spectroscopy, and photoluminescence (PL) measurements. XRD patterns confirmed that this material crystallizes in a monoclinic structure. FEG-SEM and TEM micrographs indicated that the rice-like morphologies were formed due to an increase in the effective collisions between the nanoparticles during the MH processing. The EDXS spectrum was used to verify the chemical compositional of this oxide. UV-vis spectrum revealed that this material have an indirect optical band gap. When excited with 488 nm wavelength at room temperature, the HfO2 nanostructures exhibited only one broad PL band with a maximum at around 548 nm (green emission). |
id |
UNSP_df86ca07a25482f2eb84957cb8dee844 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/42403 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-HydrothermalHfO2NanoparticlesMorphologyOptical band gapPhotoluminescenceIn this letter, we report on the obtention of hafnium oxide (HfO2) nanostructures by the microwave-hydrothermal method. These nanostructures were analyzed by X-ray diffraction (XRD), field-emission gum scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDXS), ultraviolet-visible (UV-vis) spectroscopy, and photoluminescence (PL) measurements. XRD patterns confirmed that this material crystallizes in a monoclinic structure. FEG-SEM and TEM micrographs indicated that the rice-like morphologies were formed due to an increase in the effective collisions between the nanoparticles during the MH processing. The EDXS spectrum was used to verify the chemical compositional of this oxide. UV-vis spectrum revealed that this material have an indirect optical band gap. When excited with 488 nm wavelength at room temperature, the HfO2 nanostructures exhibited only one broad PL band with a maximum at around 548 nm (green emission).Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Fed Sao Carlos, Dept Quim & Fis, LIEC, BR-13565905 Sao Carlos, SP, BrazilUniv Estadual Paulista, IQ LIEC, BR-14801907 Araraquara, SP, BrazilUniv Estadual Paulista, IQ LIEC, BR-14801907 Araraquara, SP, BrazilSpringerUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Eliziario, S. A. [UNESP]Cavalcante, L. S.Sczancoski, J. C.Pizani, P. S.Varela, José Arana [UNESP]Espinosa, J. W. M. [UNESP]Longo, Elson [UNESP]2014-05-20T15:34:03Z2014-05-20T15:34:03Z2009-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1371-1379application/pdfhttp://dx.doi.org/10.1007/s11671-009-9407-6Nanoscale Research Letters. New York: Springer, v. 4, n. 11, p. 1371-1379, 2009.1931-7573http://hdl.handle.net/11449/4240310.1007/s11671-009-9407-6WOS:000270883000019WOS000270883000019.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNanoscale Research Letters0,713info:eu-repo/semantics/openAccess2023-10-25T06:10:33Zoai:repositorio.unesp.br:11449/42403Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-25T06:10:33Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
title |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
spellingShingle |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal Eliziario, S. A. [UNESP] HfO2 Nanoparticles Morphology Optical band gap Photoluminescence |
title_short |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
title_full |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
title_fullStr |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
title_full_unstemmed |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
title_sort |
Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal |
author |
Eliziario, S. A. [UNESP] |
author_facet |
Eliziario, S. A. [UNESP] Cavalcante, L. S. Sczancoski, J. C. Pizani, P. S. Varela, José Arana [UNESP] Espinosa, J. W. M. [UNESP] Longo, Elson [UNESP] |
author_role |
author |
author2 |
Cavalcante, L. S. Sczancoski, J. C. Pizani, P. S. Varela, José Arana [UNESP] Espinosa, J. W. M. [UNESP] Longo, Elson [UNESP] |
author2_role |
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 |
Eliziario, S. A. [UNESP] Cavalcante, L. S. Sczancoski, J. C. Pizani, P. S. Varela, José Arana [UNESP] Espinosa, J. W. M. [UNESP] Longo, Elson [UNESP] |
dc.subject.por.fl_str_mv |
HfO2 Nanoparticles Morphology Optical band gap Photoluminescence |
topic |
HfO2 Nanoparticles Morphology Optical band gap Photoluminescence |
description |
In this letter, we report on the obtention of hafnium oxide (HfO2) nanostructures by the microwave-hydrothermal method. These nanostructures were analyzed by X-ray diffraction (XRD), field-emission gum scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDXS), ultraviolet-visible (UV-vis) spectroscopy, and photoluminescence (PL) measurements. XRD patterns confirmed that this material crystallizes in a monoclinic structure. FEG-SEM and TEM micrographs indicated that the rice-like morphologies were formed due to an increase in the effective collisions between the nanoparticles during the MH processing. The EDXS spectrum was used to verify the chemical compositional of this oxide. UV-vis spectrum revealed that this material have an indirect optical band gap. When excited with 488 nm wavelength at room temperature, the HfO2 nanostructures exhibited only one broad PL band with a maximum at around 548 nm (green emission). |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-11-01 2014-05-20T15:34:03Z 2014-05-20T15:34:03Z |
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/10.1007/s11671-009-9407-6 Nanoscale Research Letters. New York: Springer, v. 4, n. 11, p. 1371-1379, 2009. 1931-7573 http://hdl.handle.net/11449/42403 10.1007/s11671-009-9407-6 WOS:000270883000019 WOS000270883000019.pdf |
url |
http://dx.doi.org/10.1007/s11671-009-9407-6 http://hdl.handle.net/11449/42403 |
identifier_str_mv |
Nanoscale Research Letters. New York: Springer, v. 4, n. 11, p. 1371-1379, 2009. 1931-7573 10.1007/s11671-009-9407-6 WOS:000270883000019 WOS000270883000019.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Nanoscale Research Letters 0,713 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1371-1379 application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
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_ |
1797789508255612928 |