Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties

Autores
Encina, Ezequiel Roberto; Coronado, Eduardo A.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Photoactive hybrid nanostructures composed of metal oxides and plasmonic metals are able to perform the conversion of radiant (solar) energy into electrical or chemical energy. However, their use in large-scale practical applications still requires their photoconversion efficiency to be improved. In this work, the light-harvesting properties of hematite/plasmonic metal rodlike hybrid nanostructures are investigated on the basis of discrete dipole approximation simulations. The effects of the length and nature of the metallic counterpart on the far- and near-field optical properties of the hybrid nanostructure are analyzed in detail. The implemented methodology allowed us to assess the contribution of each component of the hybrid nanostructure to the absorption efficiency, Qabs, separately. In turn, the Qabs values obtained were employed to determine the absorbed photon flux, ø, within the α-Fe2O3 component, a relevant quantity directly related to the photoconversion efficiency. It was found that both absorption efficiency Qabs and absorbed photon flux ø can be largely enhanced through a proper selection of the length and nature of the metallic counterpart of the nanostructure, evidencing plasmon-enhanced light absorption in the α-Fe2O3 component, which is attributed to a plasmon-induced energy transfer mechanism based on near-field enhancements. Importantly, it was found that the highest ø values achieved for nanostructures composed of Ag and Al (∼11 × 1016 photons cm-2 s-1) are nearly 3 times larger than those corresponding to nanostructures composed of Au (∼4 × 1016 photons cm-2 s-1). In addition, a direct relationship between the absorbed photon flux, ø, and optical characteristics of the nanostructures, that is, the bandgap energy of α-Fe2O3 and the energy and radiative line width of the localized surface plasmon resonance, was empirically obtained. Such a relationship not only complements but also overcomes the limitations of the reported useful criteria and provides helpful guidelines for the optimum design of hybrid nanostructures with enhanced photoactive properties.
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: 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
Optical properties
Near field
Absorption enhancement
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:11336/135491
Acceder
id CONICETDig_49447b33128d2306e18a9e6558ce067d
oai_identifier_str oai:ri.conicet.gov.ar:11336/135491
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive propertiesEncina, Ezequiel RobertoCoronado, Eduardo A.Hybrid nanostructuresOptical propertiesNear fieldAbsorption enhancementhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Photoactive hybrid nanostructures composed of metal oxides and plasmonic metals are able to perform the conversion of radiant (solar) energy into electrical or chemical energy. However, their use in large-scale practical applications still requires their photoconversion efficiency to be improved. In this work, the light-harvesting properties of hematite/plasmonic metal rodlike hybrid nanostructures are investigated on the basis of discrete dipole approximation simulations. The effects of the length and nature of the metallic counterpart on the far- and near-field optical properties of the hybrid nanostructure are analyzed in detail. The implemented methodology allowed us to assess the contribution of each component of the hybrid nanostructure to the absorption efficiency, Qabs, separately. In turn, the Qabs values obtained were employed to determine the absorbed photon flux, ø, within the α-Fe2O3 component, a relevant quantity directly related to the photoconversion efficiency. It was found that both absorption efficiency Qabs and absorbed photon flux ø can be largely enhanced through a proper selection of the length and nature of the metallic counterpart of the nanostructure, evidencing plasmon-enhanced light absorption in the α-Fe2O3 component, which is attributed to a plasmon-induced energy transfer mechanism based on near-field enhancements. Importantly, it was found that the highest ø values achieved for nanostructures composed of Ag and Al (∼11 × 1016 photons cm-2 s-1) are nearly 3 times larger than those corresponding to nanostructures composed of Au (∼4 × 1016 photons cm-2 s-1). In addition, a direct relationship between the absorbed photon flux, ø, and optical characteristics of the nanostructures, that is, the bandgap energy of α-Fe2O3 and the energy and radiative line width of the localized surface plasmon resonance, was empirically obtained. Such a relationship not only complements but also overcomes the limitations of the reported useful criteria and provides helpful guidelines for the optimum design of hybrid nanostructures with enhanced photoactive properties.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: 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; ArgentinaAmerican Chemical Society2018-03info: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/11336/135491Encina, Ezequiel Roberto; Coronado, Eduardo A.; Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties; American Chemical Society; Journal of Physical Chemistry C; 122; 8; 3-2018; 4589-45991932-74471932-7455CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/acs.jpcc.7b12486info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.7b12486info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T13:12:17Zoai:ri.conicet.gov.ar:11336/135491instacron: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:34982025-12-23 13:12:17.414CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
title Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
spellingShingle Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
Encina, Ezequiel Roberto
Hybrid nanostructures
Optical properties
Near field
Absorption enhancement
title_short Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
title_full Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
title_fullStr Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
title_full_unstemmed Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
title_sort Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties
dc.creator.none.fl_str_mv Encina, Ezequiel Roberto
Coronado, Eduardo A.
author Encina, Ezequiel Roberto
author_facet Encina, Ezequiel Roberto
Coronado, Eduardo A.
author_role author
author2 Coronado, Eduardo A.
author2_role author
dc.subject.none.fl_str_mv Hybrid nanostructures
Optical properties
Near field
Absorption enhancement
topic Hybrid nanostructures
Optical properties
Near field
Absorption enhancement
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Photoactive hybrid nanostructures composed of metal oxides and plasmonic metals are able to perform the conversion of radiant (solar) energy into electrical or chemical energy. However, their use in large-scale practical applications still requires their photoconversion efficiency to be improved. In this work, the light-harvesting properties of hematite/plasmonic metal rodlike hybrid nanostructures are investigated on the basis of discrete dipole approximation simulations. The effects of the length and nature of the metallic counterpart on the far- and near-field optical properties of the hybrid nanostructure are analyzed in detail. The implemented methodology allowed us to assess the contribution of each component of the hybrid nanostructure to the absorption efficiency, Qabs, separately. In turn, the Qabs values obtained were employed to determine the absorbed photon flux, ø, within the α-Fe2O3 component, a relevant quantity directly related to the photoconversion efficiency. It was found that both absorption efficiency Qabs and absorbed photon flux ø can be largely enhanced through a proper selection of the length and nature of the metallic counterpart of the nanostructure, evidencing plasmon-enhanced light absorption in the α-Fe2O3 component, which is attributed to a plasmon-induced energy transfer mechanism based on near-field enhancements. Importantly, it was found that the highest ø values achieved for nanostructures composed of Ag and Al (∼11 × 1016 photons cm-2 s-1) are nearly 3 times larger than those corresponding to nanostructures composed of Au (∼4 × 1016 photons cm-2 s-1). In addition, a direct relationship between the absorbed photon flux, ø, and optical characteristics of the nanostructures, that is, the bandgap energy of α-Fe2O3 and the energy and radiative line width of the localized surface plasmon resonance, was empirically obtained. Such a relationship not only complements but also overcomes the limitations of the reported useful criteria and provides helpful guidelines for the optimum design of hybrid nanostructures with enhanced photoactive properties.
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: 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 Photoactive hybrid nanostructures composed of metal oxides and plasmonic metals are able to perform the conversion of radiant (solar) energy into electrical or chemical energy. However, their use in large-scale practical applications still requires their photoconversion efficiency to be improved. In this work, the light-harvesting properties of hematite/plasmonic metal rodlike hybrid nanostructures are investigated on the basis of discrete dipole approximation simulations. The effects of the length and nature of the metallic counterpart on the far- and near-field optical properties of the hybrid nanostructure are analyzed in detail. The implemented methodology allowed us to assess the contribution of each component of the hybrid nanostructure to the absorption efficiency, Qabs, separately. In turn, the Qabs values obtained were employed to determine the absorbed photon flux, ø, within the α-Fe2O3 component, a relevant quantity directly related to the photoconversion efficiency. It was found that both absorption efficiency Qabs and absorbed photon flux ø can be largely enhanced through a proper selection of the length and nature of the metallic counterpart of the nanostructure, evidencing plasmon-enhanced light absorption in the α-Fe2O3 component, which is attributed to a plasmon-induced energy transfer mechanism based on near-field enhancements. Importantly, it was found that the highest ø values achieved for nanostructures composed of Ag and Al (∼11 × 1016 photons cm-2 s-1) are nearly 3 times larger than those corresponding to nanostructures composed of Au (∼4 × 1016 photons cm-2 s-1). In addition, a direct relationship between the absorbed photon flux, ø, and optical characteristics of the nanostructures, that is, the bandgap energy of α-Fe2O3 and the energy and radiative line width of the localized surface plasmon resonance, was empirically obtained. Such a relationship not only complements but also overcomes the limitations of the reported useful criteria and provides helpful guidelines for the optimum design of hybrid nanostructures with enhanced photoactive properties.
publishDate 2018
dc.date.none.fl_str_mv 2018-03
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/11336/135491
Encina, Ezequiel Roberto; Coronado, Eduardo A.; Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties; American Chemical Society; Journal of Physical Chemistry C; 122; 8; 3-2018; 4589-4599
1932-7447
1932-7455
CONICET Digital
CONICET
url http://hdl.handle.net/11336/135491
identifier_str_mv Encina, Ezequiel Roberto; Coronado, Eduardo A.; Keys for designing hematite/plasmonic metal hybrid nanostructures with enhanced photoactive properties; American Chemical Society; Journal of Physical Chemistry C; 122; 8; 3-2018; 4589-4599
1932-7447
1932-7455
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.acs.org/doi/10.1021/acs.jpcc.7b12486
info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.7b12486
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 American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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 12.441415

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