Surfactant-mediated variation of band-edge emission in CdS nanocomposites

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dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorLavayen, Vladimir
dc.contributor.authorMirabal, Neisy
dc.contributor.authorSanta-Ana, María A.
dc.contributor.authorBenavente, Eglantina
dc.contributor.authorOrmazabal, S.
dc.contributor.authorGonzalez, Guillermo
dc.contributor.authorLopez, Z.
dc.contributor.authorSchöps, O.
dc.contributor.authorWoggon, U.
dc.contributor.authorSotomayor Torres, Clivia M.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderEuropean Commissionen
dc.contributor.funderen
dc.date.accessioned2016-07-07T13:50:53Z
dc.date.available2016-07-07T13:50:53Z
dc.date.issued2007-08-03
dc.date.updated2012-11-29T20:58:05Z
dc.description.abstractThe optical-structural characteristics of the direct optical band-gap semiconducting series of surfactant template-mediated laminar (CdS)x(CdCl2)y(CnH2n+4N)z nanocomposites are reported. X-ray diffraction measurements of the nanocomposites exhibited interlaminar distances in the range 2.9-3.6 nm with observations of eighth order {0 0 l} diffraction planes indicative of a high degree of laminarity and crystallographic order. Diffuse reflectance measurements have determined that the profile of their emission spectrum is that of a direct band-gap with absorption edges in the range 2.11-2.40 eV, depending on the CdS mole fraction in the nanocomposite. Photoluminescence (PL) excitation and time-resolved PL spectroscopies give an estimate of the maximum relative absorbance of the nanocomposites at ∼420 nm while the minimum was observed at ∼560 nm. The main emission was observed at ∼700 nm with emission from doubly ionized sulphur vacancies observed at ∼615 nm at room temperature. The CdS-containing nanocomposite is thus a surfactant-mediated modular system with variable band-gap energy emission.en
dc.description.sponsorshipEuropean Commission (Project Ph OREMOST (FP6/2003/IST/2-511616)); Science Foundation Ireland (SFI Investigator Award 02/IN.1/172); Fondo Nacional de Desarrollo Científico y Tecnológico, Chile (FONDECyT Grants 1050344, 1030102, and 7050081.)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO'Dwyer, C., Lavayen, V., Mirabal, N., Santa Ana, M. A., Benavente, E., Ormazabal, S., Gonzalez, G., Lopez, Z., Schöps, O., Woggon, U. and Sotomayor Torres, C. M. (2007) 'Surfactant-mediated variation of band-edge emission in CdS nanocomposites', Photonics and Nanostructures - Fundamentals and Applications, 5(2-3), pp. 45-52. http://www.sciencedirect.com/science/article/pii/S1569441007000284en
dc.identifier.endpage52en
dc.identifier.issued2-3en
dc.identifier.journaltitlePhotonics and Nanostructures - Fundamentals and Applicationsen
dc.identifier.startpage45en
dc.identifier.urihttps://hdl.handle.net/10468/2836
dc.identifier.volume5en
dc.language.isoenen
dc.publisherElsevieren
dc.rights© 2007 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectCadmium sulphideen
dc.subjectScanning electron microscopyen
dc.subjectPhotoluminescenceen
dc.subjectOptical propertiesen
dc.subjectNanostructuresen
dc.titleSurfactant-mediated variation of band-edge emission in CdS nanocompositesen
dc.typeArticle (peer-reviewed)en
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