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dc.creatorPeláez, Ramón J.es
dc.creatorEspinós Manzorro, Juan Pedroes
dc.creatorAfonso Rodríguez, Carmen Nieveses
dc.date.accessioned2018-10-18T15:00:01Z
dc.date.available2018-10-18T15:00:01Z
dc.date.issued2017
dc.identifier.citationPeláez, R.J., Espinós Manzorro, J.P. y Afonso Rodríguez, C.N. (2017). Formation of nitrile species on Ag nanostructures supported on a-Al2O3: a new corrosion route for silver exposed to the atmosphere. Nanotechnology, 28, 175709-175723.
dc.identifier.issn0957-4484es
dc.identifier.issn1361-6528es
dc.identifier.urihttps://hdl.handle.net/11441/79554
dc.description.abstractThe aging of supported Ag nanostructures upon storage in ambient conditions (air and room temperature) for 20 months has been studied. The samples are produced on glass substrates by pulsed laser deposition (PLD); first a 15 nm thick buffer layer of amorphous aluminum oxide (a-Al2O3) is deposited, followed by PLD of Ag. The amount of deposited Ag ranges from that leading to a discontinuous layer up to an almost-percolated layer with a thickness of <6 nm. Some regions of the as-grown silver layers are converted, by laser induced dewetting, into round isolated nanoparticles (NPs) with diameters of up to ∼25 nm. The plasmonic, structural and chemical properties of both as-grown and laser exposed regions upon aging have been followed using extinction spectroscopy, scanning electron microscopy and x-ray photoelectron spectroscopy, respectively. The results show that the discontinuous as-grown regions are optically and chemically unstable and that the metal becomes oxidized faster, the smaller the amount of Ag. The corrosion leads to the formation of nitrile species due to the reaction between NOx species from the atmosphere adsorbed at the surface of Ag, and hydrocarbons adsorbed in defects at the surface of the a-Al2O3 layer during the deposition of the Ag nanostructures by PLD that migrate to the surface of the metal with time. The nitrile formation thus results in the main oxidation mechanism and inhibits almost completely the formation of sulphate/sulphide. Finally, the optical changes upon aging offer an easy-to-use tool for following the aging process. They are dominated by an enhanced absorption in the UV side of the spectrum and a blue-shift of the surface plasmon resonance that are, respectively, related to the formation of a dielectric overlayer on the Ag nanostructure and changes in the dimensions/features of the nanostructures, both due to the oxidation processes
dc.description.sponsorshipMinisterio de Ciencia e Innovación MAT2013-42900-P, MAT2013-40852-Res
dc.description.sponsorshipJunta de Andalucía TEP8067es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherInstitute of Physics Publishinges
dc.relation.ispartofNanotechnology, 28, 175709-175723.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectSilveres
dc.subjectMetal nanoparticleses
dc.subjectOxidationes
dc.subjectCorrosiones
dc.subjectPulsed laser depositiones
dc.titleFormation of nitrile species on Ag nanostructures supported on a-Al2O3: a new corrosion route for silver exposed to the atmospherees
dc.typeinfo:eu-repo/semantics/articlees
dc.type.versioninfo:eu-repo/semantics/submittedVersiones
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.relation.projectIDMAT2013-42900-Pes
dc.relation.projectIDMAT2013-40852-Res
dc.relation.projectIDTEP8067es
dc.relation.publisherversionhttp://dx.doi.org/10.1088/1361-6528/aa65c0es
dc.identifier.doi10.1088/1361-6528/aa65c0es
idus.format.extent37 p.es
dc.journaltitleNanotechnologyes
dc.publication.volumen28es
dc.publication.initialPage175709es
dc.publication.endPage175723es
dc.contributor.funderMinisterio de Ciencia e Innovación (MICIN). España
dc.contributor.funderJunta de Andalucía

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