Structure and properties of Ti4+-Ureasil organic-inorganic hybrids

Detalhes bibliográficos
Autor(a) principal: Molina, Celso [UNESP]
Data de Publicação: 2006
Outros Autores: Dahmouche, Karim [UNESP], Hammer, Peter [UNESP], Bermudez, Verónica de Zea, Carlos, Luís D., Ferrari, Maurizio, Montagna, Maurizio, Gonçalves, Rogéria R., De Oliveira, Luiz F. C., Edwards, Howell G. M., Messaddeqa, Younes [UNESP], Ribeiro, Sidney José Lima [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S0103-50532006000300003
http://hdl.handle.net/11449/68918
Resumo: Hybrid planar waveguides were prepared from Ti4+-acetylacetone (acac)-Ureasil sols deposited on glass substrates. Structural features have been investigated by spectroscopic measurements (Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS) and Raman scattering) and Small Angle X-ray Scattering (SAXS). Addition of Ti 4+-acac to the ureasil (Ti:Si molar ratio 1:1) leads to the formation of bonds between the Ti complex and the siloxane groups, whereas further addition of Ti4+ (Ti:Si molar ratio 5:1) leads to the additional formation of titanium-rich nanoclusters. The optical parameters of the waveguides such as refractive index, thickness, propagating modes and attenuation coefficient were measured at 632.8, 543.5 and 1550 nm by the prism coupling technique. The refractive index can be tuned by the Ti4+ relative content. The few microns thick planar waveguides support well confined propagating modes with low attenuation loss for all compositions. ©2006 Sociedade Brasileira de Química.
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spelling Structure and properties of Ti4+-Ureasil organic-inorganic hybridsHybrid materialsPlanar waveguidesSol-gelUreasilHybrid planar waveguides were prepared from Ti4+-acetylacetone (acac)-Ureasil sols deposited on glass substrates. Structural features have been investigated by spectroscopic measurements (Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS) and Raman scattering) and Small Angle X-ray Scattering (SAXS). Addition of Ti 4+-acac to the ureasil (Ti:Si molar ratio 1:1) leads to the formation of bonds between the Ti complex and the siloxane groups, whereas further addition of Ti4+ (Ti:Si molar ratio 5:1) leads to the additional formation of titanium-rich nanoclusters. The optical parameters of the waveguides such as refractive index, thickness, propagating modes and attenuation coefficient were measured at 632.8, 543.5 and 1550 nm by the prism coupling technique. The refractive index can be tuned by the Ti4+ relative content. The few microns thick planar waveguides support well confined propagating modes with low attenuation loss for all compositions. ©2006 Sociedade Brasileira de Química.Instituto de Química Universidade Estadual Paulista, CP 355, 14801- 970 Araraquara - SPDepartamento de Química Universidade de Trás-os-Montes e Alto Douro, 5001 Vila Real CodexDepartamento de Física Universidade de Aveiro, 3810 AveiroCNR-INF Instituto di Fotonica I Nanotecnologie CSMFO Group, via Sommarive 14, 38050, Povo (TN)IDipartimento di Fisica Università di Trento CSMFO Group, via Sommarive 14, 38050 Povo, (TN)Departamento de Química Universidade de São Paulo, 14040-901 Ribeirão Preto - SPDepartamento de Quimica Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora - MGDepartment of Chemical and Forensic Sciences University of Bradford, Bradford, BD7 1 DPInstituto de Química Universidade Estadual Paulista, CP 355, 14801- 970 Araraquara - SPUniversidade Estadual Paulista (Unesp)Universidade de Trás-os-Montes e Alto DouroUniversidade de AveiroCSMFO GroupUniversidade de São Paulo (USP)Universidade Federal de Juiz de Fora (UFJF)University of BradfordMolina, Celso [UNESP]Dahmouche, Karim [UNESP]Hammer, Peter [UNESP]Bermudez, Verónica de ZeaCarlos, Luís D.Ferrari, MaurizioMontagna, MaurizioGonçalves, Rogéria R.De Oliveira, Luiz F. C.Edwards, Howell G. M.Messaddeqa, Younes [UNESP]Ribeiro, Sidney José Lima [UNESP]2014-05-27T11:21:53Z2014-05-27T11:21:53Z2006-06-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article443-452application/pdfhttp://dx.doi.org/10.1590/S0103-50532006000300003Journal of the Brazilian Chemical Society, v. 17, n. 3, p. 443-452, 2006.0103-5053http://hdl.handle.net/11449/6891810.1590/S0103-50532006000300003S0103-50532006000300003WOS:0002377384000032-s2.0-337447197132-s2.0-33744719713.pdf646684102350613164460474630346540000-0003-3286-94400000-0002-3823-0050Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,357info:eu-repo/semantics/openAccess2024-01-11T06:30:12Zoai:repositorio.unesp.br:11449/68918Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:42:50.801610Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
title Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
spellingShingle Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
Molina, Celso [UNESP]
Hybrid materials
Planar waveguides
Sol-gel
Ureasil
title_short Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
title_full Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
title_fullStr Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
title_full_unstemmed Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
title_sort Structure and properties of Ti4+-Ureasil organic-inorganic hybrids
author Molina, Celso [UNESP]
author_facet Molina, Celso [UNESP]
Dahmouche, Karim [UNESP]
Hammer, Peter [UNESP]
Bermudez, Verónica de Zea
Carlos, Luís D.
Ferrari, Maurizio
Montagna, Maurizio
Gonçalves, Rogéria R.
De Oliveira, Luiz F. C.
Edwards, Howell G. M.
Messaddeqa, Younes [UNESP]
Ribeiro, Sidney José Lima [UNESP]
author_role author
author2 Dahmouche, Karim [UNESP]
Hammer, Peter [UNESP]
Bermudez, Verónica de Zea
Carlos, Luís D.
Ferrari, Maurizio
Montagna, Maurizio
Gonçalves, Rogéria R.
De Oliveira, Luiz F. C.
Edwards, Howell G. M.
Messaddeqa, Younes [UNESP]
Ribeiro, Sidney José Lima [UNESP]
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade de Trás-os-Montes e Alto Douro
Universidade de Aveiro
CSMFO Group
Universidade de São Paulo (USP)
Universidade Federal de Juiz de Fora (UFJF)
University of Bradford
dc.contributor.author.fl_str_mv Molina, Celso [UNESP]
Dahmouche, Karim [UNESP]
Hammer, Peter [UNESP]
Bermudez, Verónica de Zea
Carlos, Luís D.
Ferrari, Maurizio
Montagna, Maurizio
Gonçalves, Rogéria R.
De Oliveira, Luiz F. C.
Edwards, Howell G. M.
Messaddeqa, Younes [UNESP]
Ribeiro, Sidney José Lima [UNESP]
dc.subject.por.fl_str_mv Hybrid materials
Planar waveguides
Sol-gel
Ureasil
topic Hybrid materials
Planar waveguides
Sol-gel
Ureasil
description Hybrid planar waveguides were prepared from Ti4+-acetylacetone (acac)-Ureasil sols deposited on glass substrates. Structural features have been investigated by spectroscopic measurements (Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS) and Raman scattering) and Small Angle X-ray Scattering (SAXS). Addition of Ti 4+-acac to the ureasil (Ti:Si molar ratio 1:1) leads to the formation of bonds between the Ti complex and the siloxane groups, whereas further addition of Ti4+ (Ti:Si molar ratio 5:1) leads to the additional formation of titanium-rich nanoclusters. The optical parameters of the waveguides such as refractive index, thickness, propagating modes and attenuation coefficient were measured at 632.8, 543.5 and 1550 nm by the prism coupling technique. The refractive index can be tuned by the Ti4+ relative content. The few microns thick planar waveguides support well confined propagating modes with low attenuation loss for all compositions. ©2006 Sociedade Brasileira de Química.
publishDate 2006
dc.date.none.fl_str_mv 2006-06-08
2014-05-27T11:21:53Z
2014-05-27T11:21:53Z
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/10.1590/S0103-50532006000300003
Journal of the Brazilian Chemical Society, v. 17, n. 3, p. 443-452, 2006.
0103-5053
http://hdl.handle.net/11449/68918
10.1590/S0103-50532006000300003
S0103-50532006000300003
WOS:000237738400003
2-s2.0-33744719713
2-s2.0-33744719713.pdf
6466841023506131
6446047463034654
0000-0003-3286-9440
0000-0002-3823-0050
url http://dx.doi.org/10.1590/S0103-50532006000300003
http://hdl.handle.net/11449/68918
identifier_str_mv Journal of the Brazilian Chemical Society, v. 17, n. 3, p. 443-452, 2006.
0103-5053
10.1590/S0103-50532006000300003
S0103-50532006000300003
WOS:000237738400003
2-s2.0-33744719713
2-s2.0-33744719713.pdf
6466841023506131
6446047463034654
0000-0003-3286-9440
0000-0002-3823-0050
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of the Brazilian Chemical Society
1.444
0,357
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 443-452
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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