Nanoscale manipulation of CdSe quantum dots in layer-by-layer films: influence of the host polyelectrolyte on the luminescent properties

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dc.contributor.authorZucolotto, V
dc.contributor.authorGattas-Asfura, K. M.
dc.contributor.authorTumolo, T.
dc.contributor.authorPerinotto, A. C.
dc.contributor.authorAntunes, P. A.
dc.contributor.authorConstantino, CJL
dc.contributor.authorBaptista, M. S.
dc.contributor.authorLeblanc, R. M.
dc.contributor.authorOliveira, O. N.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniv Miami
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:24:26Z
dc.date.available2014-05-20T15:24:26Z
dc.date.issued2005-06-30
dc.description.abstractThioglycolic acid-capped Use quantum dots (QDs) were assembled on glass substrates with two distinct polyelectrolytes, viz poly(allylamine hydrochloride) (PAH) and poly(amidoamine) (PAMAM), generation 4 dendrimer, via the layer-by-layer (LbL) technique. Films containing up to 30 polyelectrolyte/QD bilayers were prepared. The growth of the multilayers was monitored with UV-vis spectroscopy, which showed an almost linear increase in the absorbance of the 2.8 nm QDs at 535 nm with the number of deposited bilayers. AFM measurements estimated a film thickness of 3 nm per bilayer for the PAH/Cdse films. The adsorption process and the optical properties of the PAMAM/CdSe LbL films were further analyzed layer-by-layer using surface plasmon resonance (SPR), from which a thickness of 3.2 nm was found for a PAMAM/CdSe bilayer. Photoluminescence measurements revealed higher photooxidation of the quantum dots in PAH/CdSe than in PAMAM/CdSe films. (c) 2004 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv São Paulo, IFSC, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Miami, Dept Chem, Coral Gables, FL 33146 USA
dc.description.affiliationUniv São Paulo, IQ, BR-05513970 São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, DFQB, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, DFQB, BR-19060900 Presidente Prudente, SP, Brazil
dc.format.extent397-402
dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2004.11.044
dc.identifier.citationApplied Surface Science. Amsterdam: Elsevier B.V., v. 246, n. 4, p. 397-402, 2005.
dc.identifier.doi10.1016/j.apsusc.2004.11.044
dc.identifier.issn0169-4332
dc.identifier.urihttp://hdl.handle.net/11449/35041
dc.identifier.wosWOS:000229884900017
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofApplied Surface Science
dc.relation.ispartofjcr4.439
dc.relation.ispartofsjr1,093
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectquantum dotspt
dc.subjectpoly(allylamine hydrochloride)pt
dc.subjectpoly(amidoamine)pt
dc.subjectlayer-by-layerpt
dc.titleNanoscale manipulation of CdSe quantum dots in layer-by-layer films: influence of the host polyelectrolyte on the luminescent propertiesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0001-7079-7666[7]
unesp.author.orcid0000-0003-4307-3077[1]
unesp.author.orcid0000-0002-5399-5860[9]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept

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Artigos - Física, Química e Biologia - FCT