Modulation of the electron transfer processes in Au-ZnO nanostructures

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dc.identifier.uri Aguirre, Matias E. Armanelli, A. Perelstein, Gonzalo Feldhoff, Armin Tolley, Alfredo J. Grela, Maria A. 2015-12-08T13:08:06Z 2016-03-12T23:05:43Z 2015-03-12
dc.identifier.citation Aguirre, M. E.; Armanelli, A.; Perelstein, G.; Feldhoff, A.; Tolley, A. J.; Grela, M. A.: Modulation of the electron transfer processes in Au-ZnO nanostructures. In: Nanoscale 7 (2015), Nr. 15, S. 6667-6674. DOI:
dc.description.abstract 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. eng
dc.description.sponsorship CONICET
dc.description.sponsorship ANPCyT PICT-2013-1456
dc.language.iso eng eng
dc.publisher Cambridge : Royal Society of Chemistry
dc.relation.ispartofseries Nanoscale 7 (2015), Nr. 15
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject surface-plasmon resonance eng
dc.subject induced charge separation eng
dc.subject visible-light activity eng
dc.subject metal nanoparticles eng
dc.subject gold nanoparticles eng
dc.subject chemistry determines eng
dc.subject relaxation dynamics eng
dc.subject hot-electrons eng
dc.subject tio2 films eng
dc.subject zinc-oxide eng
dc.subject.ddc 530 | Physik ger
dc.subject.ddc 540 | Chemie ger
dc.title Modulation of the electron transfer processes in Au-ZnO nanostructures eng
dc.type Article
dc.type Text
dc.relation.essn 2040-3372
dc.relation.issn 2040-3364
dc.bibliographicCitation.issue 15
dc.bibliographicCitation.volume 7
dc.bibliographicCitation.firstPage 6667
dc.bibliographicCitation.lastPage 6674
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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