Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study

Autores
Sanchez, Veronica Muriel; Martínez, Eduardo David; Martinez Ricci, Maria Luz; Troiani, Horacio Esteban; Soler Illia, Galo Juan de Avila Arturo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Gold nanoparticles (NP) were synthesized inside ordered mesoporous TiO2 thin films (MTTF) by stepwise reduction of AuCl4 − with NaBH4. This leads to an optical material (Au@TiO2) of interest for plasmonic applications. The films (pure titania or gold-titania nanocomposites) were thoroughly characterized by UV−visible and ellipsometry spectroscopies. The dielectric function of the MTTF, considered as the dielectric environment in which the NP are embedded, was acquired by ellipsometry and rationalized by the asymmetric Bruggeman model as an effective medium formed by the mixture of dense TiO2 and air. Nanocomposite Au@TiO2 systems present an isotropic dispersion of Au NP in the 5−8 nm range. The UV−visible spectra obtained with a low nanoparticle filling fraction of the pore volume (f NP < 2%) are accurately reproduced by both Maxwell−Garnett (MG) and Mie theories. Accurate and coincident values of f NP and NP size are obtained by this method. The dielectric function of Au NP used in this work was studied in detail; in particular, the interface damping parameter related to the NP/MTTF interface was determined by comparison with TEM microscopy. The potential of the ellipsometry technique to determine the material plasmonic response, and its correspondence with the UV−visible spectra, are discussed. This spectroscopy technique opens the possibility to study the plasmon response of the material to changes in the environment due to the presence of vapors, and other in situ experiments, as well as to provide nanostructural information of metallic nanoparticles (NP size, interparticle distance, number of NP) with well-defined spatial localization in a multilayered system.
Fil: Sanchez, Veronica Muriel. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Martínez, Eduardo David. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Martinez Ricci, Maria Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Soler Illia, Galo Juan de Avila Arturo. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Plasmon
Effective Medium Theory
Mesoporous Thin Films
Metal Nanoparticles
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/26369

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spelling Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling studySanchez, Veronica MurielMartínez, Eduardo DavidMartinez Ricci, Maria LuzTroiani, Horacio EstebanSoler Illia, Galo Juan de Avila ArturoPlasmonEffective Medium TheoryMesoporous Thin FilmsMetal Nanoparticleshttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2Gold nanoparticles (NP) were synthesized inside ordered mesoporous TiO2 thin films (MTTF) by stepwise reduction of AuCl4 − with NaBH4. This leads to an optical material (Au@TiO2) of interest for plasmonic applications. The films (pure titania or gold-titania nanocomposites) were thoroughly characterized by UV−visible and ellipsometry spectroscopies. The dielectric function of the MTTF, considered as the dielectric environment in which the NP are embedded, was acquired by ellipsometry and rationalized by the asymmetric Bruggeman model as an effective medium formed by the mixture of dense TiO2 and air. Nanocomposite Au@TiO2 systems present an isotropic dispersion of Au NP in the 5−8 nm range. The UV−visible spectra obtained with a low nanoparticle filling fraction of the pore volume (f NP < 2%) are accurately reproduced by both Maxwell−Garnett (MG) and Mie theories. Accurate and coincident values of f NP and NP size are obtained by this method. The dielectric function of Au NP used in this work was studied in detail; in particular, the interface damping parameter related to the NP/MTTF interface was determined by comparison with TEM microscopy. The potential of the ellipsometry technique to determine the material plasmonic response, and its correspondence with the UV−visible spectra, are discussed. This spectroscopy technique opens the possibility to study the plasmon response of the material to changes in the environment due to the presence of vapors, and other in situ experiments, as well as to provide nanostructural information of metallic nanoparticles (NP size, interparticle distance, number of NP) with well-defined spatial localization in a multilayered system.Fil: Sanchez, Veronica Muriel. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Martínez, Eduardo David. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Martinez Ricci, Maria Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Soler Illia, Galo Juan de Avila Arturo. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Chemical Society2013-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/26369Sanchez, Veronica Muriel; Martínez, Eduardo David; Martinez Ricci, Maria Luz; Troiani, Horacio Esteban; Soler Illia, Galo Juan de Avila Arturo; Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study; American Chemical Society; Journal of Physical Chemistry C; 117; 14; 3-2013; 7246-72591932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp3127847info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/jp3127847info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:37:55Zoai:ri.conicet.gov.ar:11336/26369instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:37:55.615CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
title Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
spellingShingle Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
Sanchez, Veronica Muriel
Plasmon
Effective Medium Theory
Mesoporous Thin Films
Metal Nanoparticles
title_short Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
title_full Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
title_fullStr Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
title_full_unstemmed Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
title_sort Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study
dc.creator.none.fl_str_mv Sanchez, Veronica Muriel
Martínez, Eduardo David
Martinez Ricci, Maria Luz
Troiani, Horacio Esteban
Soler Illia, Galo Juan de Avila Arturo
author Sanchez, Veronica Muriel
author_facet Sanchez, Veronica Muriel
Martínez, Eduardo David
Martinez Ricci, Maria Luz
Troiani, Horacio Esteban
Soler Illia, Galo Juan de Avila Arturo
author_role author
author2 Martínez, Eduardo David
Martinez Ricci, Maria Luz
Troiani, Horacio Esteban
Soler Illia, Galo Juan de Avila Arturo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Plasmon
Effective Medium Theory
Mesoporous Thin Films
Metal Nanoparticles
topic Plasmon
Effective Medium Theory
Mesoporous Thin Films
Metal Nanoparticles
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Gold nanoparticles (NP) were synthesized inside ordered mesoporous TiO2 thin films (MTTF) by stepwise reduction of AuCl4 − with NaBH4. This leads to an optical material (Au@TiO2) of interest for plasmonic applications. The films (pure titania or gold-titania nanocomposites) were thoroughly characterized by UV−visible and ellipsometry spectroscopies. The dielectric function of the MTTF, considered as the dielectric environment in which the NP are embedded, was acquired by ellipsometry and rationalized by the asymmetric Bruggeman model as an effective medium formed by the mixture of dense TiO2 and air. Nanocomposite Au@TiO2 systems present an isotropic dispersion of Au NP in the 5−8 nm range. The UV−visible spectra obtained with a low nanoparticle filling fraction of the pore volume (f NP < 2%) are accurately reproduced by both Maxwell−Garnett (MG) and Mie theories. Accurate and coincident values of f NP and NP size are obtained by this method. The dielectric function of Au NP used in this work was studied in detail; in particular, the interface damping parameter related to the NP/MTTF interface was determined by comparison with TEM microscopy. The potential of the ellipsometry technique to determine the material plasmonic response, and its correspondence with the UV−visible spectra, are discussed. This spectroscopy technique opens the possibility to study the plasmon response of the material to changes in the environment due to the presence of vapors, and other in situ experiments, as well as to provide nanostructural information of metallic nanoparticles (NP size, interparticle distance, number of NP) with well-defined spatial localization in a multilayered system.
Fil: Sanchez, Veronica Muriel. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Martínez, Eduardo David. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Martinez Ricci, Maria Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Soler Illia, Galo Juan de Avila Arturo. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Gold nanoparticles (NP) were synthesized inside ordered mesoporous TiO2 thin films (MTTF) by stepwise reduction of AuCl4 − with NaBH4. This leads to an optical material (Au@TiO2) of interest for plasmonic applications. The films (pure titania or gold-titania nanocomposites) were thoroughly characterized by UV−visible and ellipsometry spectroscopies. The dielectric function of the MTTF, considered as the dielectric environment in which the NP are embedded, was acquired by ellipsometry and rationalized by the asymmetric Bruggeman model as an effective medium formed by the mixture of dense TiO2 and air. Nanocomposite Au@TiO2 systems present an isotropic dispersion of Au NP in the 5−8 nm range. The UV−visible spectra obtained with a low nanoparticle filling fraction of the pore volume (f NP < 2%) are accurately reproduced by both Maxwell−Garnett (MG) and Mie theories. Accurate and coincident values of f NP and NP size are obtained by this method. The dielectric function of Au NP used in this work was studied in detail; in particular, the interface damping parameter related to the NP/MTTF interface was determined by comparison with TEM microscopy. The potential of the ellipsometry technique to determine the material plasmonic response, and its correspondence with the UV−visible spectra, are discussed. This spectroscopy technique opens the possibility to study the plasmon response of the material to changes in the environment due to the presence of vapors, and other in situ experiments, as well as to provide nanostructural information of metallic nanoparticles (NP size, interparticle distance, number of NP) with well-defined spatial localization in a multilayered system.
publishDate 2013
dc.date.none.fl_str_mv 2013-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/26369
Sanchez, Veronica Muriel; Martínez, Eduardo David; Martinez Ricci, Maria Luz; Troiani, Horacio Esteban; Soler Illia, Galo Juan de Avila Arturo; Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study; American Chemical Society; Journal of Physical Chemistry C; 117; 14; 3-2013; 7246-7259
1932-7447
CONICET Digital
CONICET
url http://hdl.handle.net/11336/26369
identifier_str_mv Sanchez, Veronica Muriel; Martínez, Eduardo David; Martinez Ricci, Maria Luz; Troiani, Horacio Esteban; Soler Illia, Galo Juan de Avila Arturo; Optical properties of Au nanoparticles included in Mesoporous TiO2 thin films: a dual experimental and modeling study; American Chemical Society; Journal of Physical Chemistry C; 117; 14; 3-2013; 7246-7259
1932-7447
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/jp3127847
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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