Polydimethylsiloxane Composites Containing Core-only Lanthanide-doped Oleylamine-stabilized Laf3 Nanoparticles With High Emission Lifetimes

dc.creatorRodrigues
dc.creatorEmille M.; Gaspar
dc.creatorRafael D. L.; Mazali
dc.creatorItalo O.; Sigoli
dc.creatorFernando A.
dc.date2015
dc.date2016-06-07T13:32:56Z
dc.date2016-06-07T13:32:56Z
dc.date.accessioned2018-03-29T01:48:41Z
dc.date.available2018-03-29T01:48:41Z
dc.identifier
dc.identifierPolydimethylsiloxane Composites Containing Core-only Lanthanide-doped Oleylamine-stabilized Laf3 Nanoparticles With High Emission Lifetimes. Royal Soc Chemistry, v. 3, p. 6376-6388 2015.
dc.identifier2050-7526
dc.identifierWOS:000356307800033
dc.identifier10.1039/c5tc00303b
dc.identifierhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC00303B#!divAbstract
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/243574
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1307272
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionThis work reports on the synthesis and spectroscopic characterization of oleylamine-stabilized lanthanide-doped LaF3 nanoparticles isolated or dispersed in polydimethylsiloxane (pdms). The hexagonal Eu(III)-doped LaF3 nanoparticles have the mean size of 6 nm and are stabilized by oleylamine molecules, allowing their dispersion in pdms. Surface effects modify the emission properties of the Eu(III)-doped LaF3 isolated nanoparticles implying different emission profiles. Isolated nanoparticles show higher Judd-Ofelt emission intensity parameter values than the bulk ones. Time-resolved luminescence spectroscopy and lifetime measurements indicate the presence of at least two different chemical environments for Eu(III) ions, one being at the nanoparticle surface and the other at the bulk. The upconversion emission mechanism of Er(III)/Yb(III) co-doped LaF3 nanoparticles is dependent on the relative amount of Er(III)/Yb(III) in the sample and it may be explained by 2.5 photons, instead of the traditional mechanism involving 2 photons. Oleylamine surface passivation of Eu(III)-doped LaF3 nanoparticles dispersed in pdms avoids the influence of the siloxane polymer on the luminescence properties, keeping their emission spectral profile unchanged. Er(III)/Yb(III) co-doped LaF3 nanoparticles exhibit the Er(III) 1540 nm emission with FWHM = 75 nm for isolated or pdms-dispersed nanoparticles, which may allow the application of such materials in polymer based erbium-doped planar waveguides. The modified methodology of synthesis allows obtaining lanthanide-doped LaF3 nanoparticles with high emission lifetimes with no need for the shell protecting core approach.
dc.description3
dc.description24
dc.description
dc.description6376
dc.description6388
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionElectron Microscopy Laboratory from the Cesar Lattes Nanoscience and Nanotechnology Center (C2Nano)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAPESP [2008/53868-0]
dc.descriptionFAPESP [2009/54066-7]
dc.description
dc.description
dc.description
dc.languageen
dc.publisherROYAL SOC CHEMISTRY
dc.publisher
dc.publisherCAMBRIDGE
dc.relationJOURNAL OF MATERIALS CHEMISTRY C
dc.rightsaberto
dc.sourceWOS
dc.subjectConversion Nanomaterials Synthesis
dc.subjectUp-conversion
dc.subjectLuminescent Properties
dc.subjectNanocrystals
dc.subjectErbium
dc.subjectSilica
dc.subjectFilms
dc.subjectIons
dc.subjectTransition
dc.subjectParameters
dc.titlePolydimethylsiloxane Composites Containing Core-only Lanthanide-doped Oleylamine-stabilized Laf3 Nanoparticles With High Emission Lifetimes
dc.typeArtículos de revistas


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