Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.vibspec.2016.10.001 http://hdl.handle.net/11449/169015 |
Resumo: | This paper reports on the thermal and optical properties of germanate glasses GeO2–PbO co-doped with silver nanoparticles and rare earth ions (Tm3+, Er3+ and Yb3+) with a focus on the thermal diffusivity (D). The presence of rare earth ions and nanoparticles is evidenced by absorption spectra and TEM images, respectively. Additionally, a structural comparison between thin films and bulk glass with the same nominal composition is given. It is found that D increases up to 20% in samples where nanoparticles are present, although their quantity corresponds only to a volume fraction of 1.7%. Therefore, such enhancement could be associated with the nanoparticles. Nevertheless, a Raman analysis revealed a structural change after the thermal treatment used for the nucleation of the nanoparticles. A decrease in the intensity of the band at 534 cm−1 in the Raman spectra is interpreted as the disruption of the 3-membered rings of the GeO4 tetrahedra. The Raman analysis also revealed the formation of small crystals of α-GeO2 type quartz and the adsorption of carbon dioxide on the surface of the silver nanoparticles inserted in the germanate thin film. |
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Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopyGermanateNanoparticlesRaman scatteringRare earthsThermal diffusivityThermal lensThis paper reports on the thermal and optical properties of germanate glasses GeO2–PbO co-doped with silver nanoparticles and rare earth ions (Tm3+, Er3+ and Yb3+) with a focus on the thermal diffusivity (D). The presence of rare earth ions and nanoparticles is evidenced by absorption spectra and TEM images, respectively. Additionally, a structural comparison between thin films and bulk glass with the same nominal composition is given. It is found that D increases up to 20% in samples where nanoparticles are present, although their quantity corresponds only to a volume fraction of 1.7%. Therefore, such enhancement could be associated with the nanoparticles. Nevertheless, a Raman analysis revealed a structural change after the thermal treatment used for the nucleation of the nanoparticles. A decrease in the intensity of the band at 534 cm−1 in the Raman spectra is interpreted as the disruption of the 3-membered rings of the GeO4 tetrahedra. The Raman analysis also revealed the formation of small crystals of α-GeO2 type quartz and the adsorption of carbon dioxide on the surface of the silver nanoparticles inserted in the germanate thin film.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Instituto Federal de Educação Ciência e Tecnologia do Sudeste de Minas Gerais Campus São João Del ReiLaboratório de Espectroscopia de Materiais Dep. de Física Universidade Federal de Juiz de ForaLaboratório de Tecnologia em Materiais Fotônicos e Optoeletrônicos Faculdade de Tecnologia de São Paulo CEETEPS/UNESPLaboratório de Tecnologia em Materiais Fotônicos e Optoeletrônicos Faculdade de Tecnologia de São Paulo CEETEPS/UNESPCiência e Tecnologia do Sudeste de Minas GeraisUniversidade Federal de Juiz de ForaUniversidade Estadual Paulista (Unesp)Carvalho, E. A.Freitas, A. M.Silva, G. H.Bell, M. J.V.Kassab, L. R.P. [UNESP]Anjos, V.2018-12-11T16:44:01Z2018-12-11T16:44:01Z2016-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article143-148application/pdfhttp://dx.doi.org/10.1016/j.vibspec.2016.10.001Vibrational Spectroscopy, v. 87, p. 143-148.0924-2031http://hdl.handle.net/11449/16901510.1016/j.vibspec.2016.10.0012-s2.0-849910792952-s2.0-84991079295.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengVibrational Spectroscopy0,453info:eu-repo/semantics/openAccess2024-01-17T06:26:52Zoai:repositorio.unesp.br:11449/169015Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-17T06:26:52Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
title |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
spellingShingle |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy Carvalho, E. A. Germanate Nanoparticles Raman scattering Rare earths Thermal diffusivity Thermal lens |
title_short |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
title_full |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
title_fullStr |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
title_full_unstemmed |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
title_sort |
Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy |
author |
Carvalho, E. A. |
author_facet |
Carvalho, E. A. Freitas, A. M. Silva, G. H. Bell, M. J.V. Kassab, L. R.P. [UNESP] Anjos, V. |
author_role |
author |
author2 |
Freitas, A. M. Silva, G. H. Bell, M. J.V. Kassab, L. R.P. [UNESP] Anjos, V. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Ciência e Tecnologia do Sudeste de Minas Gerais Universidade Federal de Juiz de Fora Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Carvalho, E. A. Freitas, A. M. Silva, G. H. Bell, M. J.V. Kassab, L. R.P. [UNESP] Anjos, V. |
dc.subject.por.fl_str_mv |
Germanate Nanoparticles Raman scattering Rare earths Thermal diffusivity Thermal lens |
topic |
Germanate Nanoparticles Raman scattering Rare earths Thermal diffusivity Thermal lens |
description |
This paper reports on the thermal and optical properties of germanate glasses GeO2–PbO co-doped with silver nanoparticles and rare earth ions (Tm3+, Er3+ and Yb3+) with a focus on the thermal diffusivity (D). The presence of rare earth ions and nanoparticles is evidenced by absorption spectra and TEM images, respectively. Additionally, a structural comparison between thin films and bulk glass with the same nominal composition is given. It is found that D increases up to 20% in samples where nanoparticles are present, although their quantity corresponds only to a volume fraction of 1.7%. Therefore, such enhancement could be associated with the nanoparticles. Nevertheless, a Raman analysis revealed a structural change after the thermal treatment used for the nucleation of the nanoparticles. A decrease in the intensity of the band at 534 cm−1 in the Raman spectra is interpreted as the disruption of the 3-membered rings of the GeO4 tetrahedra. The Raman analysis also revealed the formation of small crystals of α-GeO2 type quartz and the adsorption of carbon dioxide on the surface of the silver nanoparticles inserted in the germanate thin film. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-11-01 2018-12-11T16:44:01Z 2018-12-11T16:44:01Z |
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.vibspec.2016.10.001 Vibrational Spectroscopy, v. 87, p. 143-148. 0924-2031 http://hdl.handle.net/11449/169015 10.1016/j.vibspec.2016.10.001 2-s2.0-84991079295 2-s2.0-84991079295.pdf |
url |
http://dx.doi.org/10.1016/j.vibspec.2016.10.001 http://hdl.handle.net/11449/169015 |
identifier_str_mv |
Vibrational Spectroscopy, v. 87, p. 143-148. 0924-2031 10.1016/j.vibspec.2016.10.001 2-s2.0-84991079295 2-s2.0-84991079295.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Vibrational Spectroscopy 0,453 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
143-148 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 |
|
_version_ |
1799965647104376832 |