Modulation of the electron transfer processes in Au-ZnO nanostructures

Autores
Aguirre, Matías Ezequiel; Armanelli, A.; Perelstein, Gonzalo Martín; Feldhoff, A.; Tolley, Alfredo Juan; Grela, Maria Alejandra
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Plasmonic nanostructures comprising Au and ZnO nanoparticles synthesized by the spontaneous reduction of HAuCl4 in ethylene glycol were used to assess the possibility of modulating the direction of the electron transfer processes at the interface. One electron UV reduction and visible oxidation of the reversible couple TEMPOL/TEMPOL-H was confirmed by EPR spectroscopy. The apparent quantum yield for TEMPOL-H conversion under continuous wave visible excitation depends on the irradiation wavelength, being 0.57% and 0.27% at 450 ± 12 and 530 ± 12 nm, respectively. These results indicate that both the surface plasmon resonance and the interband transition from the 5d to the 6s level of Au nanoparticles contribute to the visible activity of the nanostructure. In addition, by detecting free electron conduction band electrons in ZnO, after the visible excitation of Au/ZnO nanostructures, we provide direct evidence of the photoexcited electron transfer from gold nanoparticles to ZnO.
Fil: Aguirre, Matías Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Armanelli, A.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina
Fil: Perelstein, Gonzalo Martín. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Feldhoff, A.. Leibniz Universitat Hannover; Alemania
Fil: Tolley, Alfredo Juan. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Plasmonics Photocatalyst
Metal-Semiconductor Nanocomposite
Photoinuced Electron Transfer
Au/ZnO
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:11336/127334
Acceder
id CONICETDig_403e39e8b7a830e04b72120824b92ee4
oai_identifier_str oai:ri.conicet.gov.ar:11336/127334
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Modulation of the electron transfer processes in Au-ZnO nanostructuresAguirre, Matías EzequielArmanelli, A.Perelstein, Gonzalo MartínFeldhoff, A.Tolley, Alfredo JuanGrela, Maria AlejandraPlasmonics PhotocatalystMetal-Semiconductor NanocompositePhotoinuced Electron TransferAu/ZnOhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Plasmonic nanostructures comprising Au and ZnO nanoparticles synthesized by the spontaneous reduction of HAuCl4 in ethylene glycol were used to assess the possibility of modulating the direction of the electron transfer processes at the interface. One electron UV reduction and visible oxidation of the reversible couple TEMPOL/TEMPOL-H was confirmed by EPR spectroscopy. The apparent quantum yield for TEMPOL-H conversion under continuous wave visible excitation depends on the irradiation wavelength, being 0.57% and 0.27% at 450 ± 12 and 530 ± 12 nm, respectively. These results indicate that both the surface plasmon resonance and the interband transition from the 5d to the 6s level of Au nanoparticles contribute to the visible activity of the nanostructure. In addition, by detecting free electron conduction band electrons in ZnO, after the visible excitation of Au/ZnO nanostructures, we provide direct evidence of the photoexcited electron transfer from gold nanoparticles to ZnO.Fil: Aguirre, Matías Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Armanelli, A.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; ArgentinaFil: Perelstein, Gonzalo Martín. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Feldhoff, A.. Leibniz Universitat Hannover; AlemaniaFil: Tolley, Alfredo Juan. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaRoyal Society of Chemistry2015-03-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/127334Aguirre, Matías Ezequiel; Armanelli, A.; Perelstein, Gonzalo Martín; Feldhoff, A.; Tolley, Alfredo Juan; et al.; Modulation of the electron transfer processes in Au-ZnO nanostructures; Royal Society of Chemistry; Nanoscale; 7; 15; 12-3-2015; 6667-66742040-33722040-3364CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2015/NR/C5NR00364D#!divAbstractinfo:eu-repo/semantics/altIdentifier/doi/10.1039/C5NR00364Dinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:55:34Zoai:ri.conicet.gov.ar:11336/127334instacron: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:34982025-09-03 09:55:34.773CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Modulation of the electron transfer processes in Au-ZnO nanostructures
title Modulation of the electron transfer processes in Au-ZnO nanostructures
spellingShingle Modulation of the electron transfer processes in Au-ZnO nanostructures
Aguirre, Matías Ezequiel
Plasmonics Photocatalyst
Metal-Semiconductor Nanocomposite
Photoinuced Electron Transfer
Au/ZnO
title_short Modulation of the electron transfer processes in Au-ZnO nanostructures
title_full Modulation of the electron transfer processes in Au-ZnO nanostructures
title_fullStr Modulation of the electron transfer processes in Au-ZnO nanostructures
title_full_unstemmed Modulation of the electron transfer processes in Au-ZnO nanostructures
title_sort Modulation of the electron transfer processes in Au-ZnO nanostructures
dc.creator.none.fl_str_mv Aguirre, Matías Ezequiel
Armanelli, A.
Perelstein, Gonzalo Martín
Feldhoff, A.
Tolley, Alfredo Juan
Grela, Maria Alejandra
author Aguirre, Matías Ezequiel
author_facet Aguirre, Matías Ezequiel
Armanelli, A.
Perelstein, Gonzalo Martín
Feldhoff, A.
Tolley, Alfredo Juan
Grela, Maria Alejandra
author_role author
author2 Armanelli, A.
Perelstein, Gonzalo Martín
Feldhoff, A.
Tolley, Alfredo Juan
Grela, Maria Alejandra
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Plasmonics Photocatalyst
Metal-Semiconductor Nanocomposite
Photoinuced Electron Transfer
Au/ZnO
topic Plasmonics Photocatalyst
Metal-Semiconductor Nanocomposite
Photoinuced Electron Transfer
Au/ZnO
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Plasmonic nanostructures comprising Au and ZnO nanoparticles synthesized by the spontaneous reduction of HAuCl4 in ethylene glycol were used to assess the possibility of modulating the direction of the electron transfer processes at the interface. One electron UV reduction and visible oxidation of the reversible couple TEMPOL/TEMPOL-H was confirmed by EPR spectroscopy. The apparent quantum yield for TEMPOL-H conversion under continuous wave visible excitation depends on the irradiation wavelength, being 0.57% and 0.27% at 450 ± 12 and 530 ± 12 nm, respectively. These results indicate that both the surface plasmon resonance and the interband transition from the 5d to the 6s level of Au nanoparticles contribute to the visible activity of the nanostructure. In addition, by detecting free electron conduction band electrons in ZnO, after the visible excitation of Au/ZnO nanostructures, we provide direct evidence of the photoexcited electron transfer from gold nanoparticles to ZnO.
Fil: Aguirre, Matías Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Armanelli, A.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina
Fil: Perelstein, Gonzalo Martín. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Feldhoff, A.. Leibniz Universitat Hannover; Alemania
Fil: Tolley, Alfredo Juan. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Plasmonic nanostructures comprising Au and ZnO nanoparticles synthesized by the spontaneous reduction of HAuCl4 in ethylene glycol were used to assess the possibility of modulating the direction of the electron transfer processes at the interface. One electron UV reduction and visible oxidation of the reversible couple TEMPOL/TEMPOL-H was confirmed by EPR spectroscopy. The apparent quantum yield for TEMPOL-H conversion under continuous wave visible excitation depends on the irradiation wavelength, being 0.57% and 0.27% at 450 ± 12 and 530 ± 12 nm, respectively. These results indicate that both the surface plasmon resonance and the interband transition from the 5d to the 6s level of Au nanoparticles contribute to the visible activity of the nanostructure. In addition, by detecting free electron conduction band electrons in ZnO, after the visible excitation of Au/ZnO nanostructures, we provide direct evidence of the photoexcited electron transfer from gold nanoparticles to ZnO.
publishDate 2015
dc.date.none.fl_str_mv 2015-03-12
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/11336/127334
Aguirre, Matías Ezequiel; Armanelli, A.; Perelstein, Gonzalo Martín; Feldhoff, A.; Tolley, Alfredo Juan; et al.; Modulation of the electron transfer processes in Au-ZnO nanostructures; Royal Society of Chemistry; Nanoscale; 7; 15; 12-3-2015; 6667-6674
2040-3372
2040-3364
CONICET Digital
CONICET
url http://hdl.handle.net/11336/127334
identifier_str_mv Aguirre, Matías Ezequiel; Armanelli, A.; Perelstein, Gonzalo Martín; Feldhoff, A.; Tolley, Alfredo Juan; et al.; Modulation of the electron transfer processes in Au-ZnO nanostructures; Royal Society of Chemistry; Nanoscale; 7; 15; 12-3-2015; 6667-6674
2040-3372
2040-3364
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/NR/C5NR00364D#!divAbstract
info:eu-repo/semantics/altIdentifier/doi/10.1039/C5NR00364D
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
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 13.13397

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