Au@ZnO hybrid nanostructures: Correlation between morphology and optical response

Autores
Encina, Ezequiel Roberto; Perez, Manuel Alejo; Coronado, Eduardo A.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Au@ZnO hybrid nanostructures (HNs) have been synthesized in aqueous media by implementing a simple chemical methodology. These HNs consist of 40 nm mean size almost spherical Au cores, over which the heterogeneous formation of ZnO is observed. By increasing the concentration of ZnO precursors in the system, it is possible to change the morphology of the material formed over the Au core from branched to shell like structures, which, in turn, significantly modifies the extinction properties of the naked Au core nanoparticles. This effect has been rationalized by means of electrodynamics simulations based on two different approaches: the Mie theory for coated spheres and the Discrete Dipole Approximation (DDA). The changes measured in the extinction spectra as the amount of ZnO formed around the Au cores increases are properly described by both methodologies, while the good correlation between experimental and theoretical spectra suggest that the ZnO material includes a significant amount of water. Furthermore, based on the Mie theory results, a graphical method was implemented which allows us to predict the main morphological parameters of the Au@ZnO HNs. In addition, the combination of optical measurements, morphological characterization and DDA modeling allowed us to estimate that the water content of the shell surrounding the metallic core is 65%. The methodology presented in this work provides a useful tool to characterize the structural properties of HNs and can be straightforwardly generalized to other systems.
Fil: Encina, Ezequiel Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Perez, Manuel Alejo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Coronado, Eduardo A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Materia
Hybrid nanostructures
Plasmonics
Synthesis and characterization
Electrodynamics modelling
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:11336/185724
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Au@ZnO hybrid nanostructures: Correlation between morphology and optical responseEncina, Ezequiel RobertoPerez, Manuel AlejoCoronado, Eduardo A.Hybrid nanostructuresPlasmonicsSynthesis and characterizationElectrodynamics modellinghttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2Au@ZnO hybrid nanostructures (HNs) have been synthesized in aqueous media by implementing a simple chemical methodology. These HNs consist of 40 nm mean size almost spherical Au cores, over which the heterogeneous formation of ZnO is observed. By increasing the concentration of ZnO precursors in the system, it is possible to change the morphology of the material formed over the Au core from branched to shell like structures, which, in turn, significantly modifies the extinction properties of the naked Au core nanoparticles. This effect has been rationalized by means of electrodynamics simulations based on two different approaches: the Mie theory for coated spheres and the Discrete Dipole Approximation (DDA). The changes measured in the extinction spectra as the amount of ZnO formed around the Au cores increases are properly described by both methodologies, while the good correlation between experimental and theoretical spectra suggest that the ZnO material includes a significant amount of water. Furthermore, based on the Mie theory results, a graphical method was implemented which allows us to predict the main morphological parameters of the Au@ZnO HNs. In addition, the combination of optical measurements, morphological characterization and DDA modeling allowed us to estimate that the water content of the shell surrounding the metallic core is 65%. The methodology presented in this work provides a useful tool to characterize the structural properties of HNs and can be straightforwardly generalized to other systems.Fil: Encina, Ezequiel Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Perez, Manuel Alejo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Coronado, Eduardo A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaRoyal Society of Chemistry2015-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/185724Encina, Ezequiel Roberto; Perez, Manuel Alejo; Coronado, Eduardo A.; Au@ZnO hybrid nanostructures: Correlation between morphology and optical response; Royal Society of Chemistry; RSC Advances; 5; 69; 6-2015; 56210-562182046-2069CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra05834ainfo:eu-repo/semantics/altIdentifier/doi/10.1039/c5ra05834ainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:21:06Zoai:ri.conicet.gov.ar:11336/185724instacron: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:34982025-09-10 13:21:06.644CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
title Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
spellingShingle Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
Encina, Ezequiel Roberto
Hybrid nanostructures
Plasmonics
Synthesis and characterization
Electrodynamics modelling
title_short Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
title_full Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
title_fullStr Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
title_full_unstemmed Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
title_sort Au@ZnO hybrid nanostructures: Correlation between morphology and optical response
dc.creator.none.fl_str_mv Encina, Ezequiel Roberto
Perez, Manuel Alejo
Coronado, Eduardo A.
author Encina, Ezequiel Roberto
author_facet Encina, Ezequiel Roberto
Perez, Manuel Alejo
Coronado, Eduardo A.
author_role author
author2 Perez, Manuel Alejo
Coronado, Eduardo A.
author2_role author
author
dc.subject.none.fl_str_mv Hybrid nanostructures
Plasmonics
Synthesis and characterization
Electrodynamics modelling
topic Hybrid nanostructures
Plasmonics
Synthesis and characterization
Electrodynamics modelling
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Au@ZnO hybrid nanostructures (HNs) have been synthesized in aqueous media by implementing a simple chemical methodology. These HNs consist of 40 nm mean size almost spherical Au cores, over which the heterogeneous formation of ZnO is observed. By increasing the concentration of ZnO precursors in the system, it is possible to change the morphology of the material formed over the Au core from branched to shell like structures, which, in turn, significantly modifies the extinction properties of the naked Au core nanoparticles. This effect has been rationalized by means of electrodynamics simulations based on two different approaches: the Mie theory for coated spheres and the Discrete Dipole Approximation (DDA). The changes measured in the extinction spectra as the amount of ZnO formed around the Au cores increases are properly described by both methodologies, while the good correlation between experimental and theoretical spectra suggest that the ZnO material includes a significant amount of water. Furthermore, based on the Mie theory results, a graphical method was implemented which allows us to predict the main morphological parameters of the Au@ZnO HNs. In addition, the combination of optical measurements, morphological characterization and DDA modeling allowed us to estimate that the water content of the shell surrounding the metallic core is 65%. The methodology presented in this work provides a useful tool to characterize the structural properties of HNs and can be straightforwardly generalized to other systems.
Fil: Encina, Ezequiel Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Perez, Manuel Alejo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Coronado, Eduardo A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
description Au@ZnO hybrid nanostructures (HNs) have been synthesized in aqueous media by implementing a simple chemical methodology. These HNs consist of 40 nm mean size almost spherical Au cores, over which the heterogeneous formation of ZnO is observed. By increasing the concentration of ZnO precursors in the system, it is possible to change the morphology of the material formed over the Au core from branched to shell like structures, which, in turn, significantly modifies the extinction properties of the naked Au core nanoparticles. This effect has been rationalized by means of electrodynamics simulations based on two different approaches: the Mie theory for coated spheres and the Discrete Dipole Approximation (DDA). The changes measured in the extinction spectra as the amount of ZnO formed around the Au cores increases are properly described by both methodologies, while the good correlation between experimental and theoretical spectra suggest that the ZnO material includes a significant amount of water. Furthermore, based on the Mie theory results, a graphical method was implemented which allows us to predict the main morphological parameters of the Au@ZnO HNs. In addition, the combination of optical measurements, morphological characterization and DDA modeling allowed us to estimate that the water content of the shell surrounding the metallic core is 65%. The methodology presented in this work provides a useful tool to characterize the structural properties of HNs and can be straightforwardly generalized to other systems.
publishDate 2015
dc.date.none.fl_str_mv 2015-06
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/11336/185724
Encina, Ezequiel Roberto; Perez, Manuel Alejo; Coronado, Eduardo A.; Au@ZnO hybrid nanostructures: Correlation between morphology and optical response; Royal Society of Chemistry; RSC Advances; 5; 69; 6-2015; 56210-56218
2046-2069
CONICET Digital
CONICET
url http://hdl.handle.net/11336/185724
identifier_str_mv Encina, Ezequiel Roberto; Perez, Manuel Alejo; Coronado, Eduardo A.; Au@ZnO hybrid nanostructures: Correlation between morphology and optical response; Royal Society of Chemistry; RSC Advances; 5; 69; 6-2015; 56210-56218
2046-2069
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra05834a
info:eu-repo/semantics/altIdentifier/doi/10.1039/c5ra05834a
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
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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score 12.48226

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