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Fluorescent silver oligomeric clusters and colloidal particles

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRÉGUER-DELAPIERRE, Mona
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROCCO, Frédéric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLELONG, Gérald
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLE NESTOUR, Anne
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCARDINAL, Thierry
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorMAALI, Abdelhamid
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorLOUNIS, Brahim
dc.date.issued2005
dc.identifier.issn1293-2558
dc.description.abstractEnHighly luminescent single colloidal silver nanoparticles under blue excitation were detected. The intense luminescence observed from the single particles is attributed to different emissive centers. Picosecond lifetimes of those single nano-objects have been measured. Comparison with colloidal particles emission formed in aqueous solution, using polyacrylate polyanion as stabilizer is drawn. The optical properties of silver colloidal particles in solution are observed while their surface is changed by deposition of silver ion. A large visible emission under UV or surface plasmon region excitations is observed for Agn@Ag+, while no fluorescence emission was found for Agn or Ag+ systems. The intense visible light emission changes should primarily come from chemical surface active sites. It was observed that the oligomeric clusters, composed of only few atoms Ag4+x x+ and Ag7 3+, have a substantial emission in the same visible region. A model which ascribes the photoemission of the chemically modified silver colloidal particle to oligomeric clusters on the Ag particle surface is proposed. Those emissive water soluble silver clusters have potential for biological labelling, and light emitting sources in nanoscale optoelectronics applications.
dc.language.isoen
dc.publisherElsevier
dc.subject.enLuminescence
dc.subject.enSpectroscopy
dc.subject.enSilver nanoparticles
dc.subject.enCluster
dc.subject.enOptical microscopy
dc.subject.enPhotoactivation
dc.typeArticle de revue
dc.identifier.doi10.1016/j.solidstatesciences.2005.01.017
dc.subject.halChimie/Matériaux
bordeaux.journalSolid State Sciences
bordeaux.page812-818
bordeaux.volume7
bordeaux.issue7
bordeaux.peerReviewedoui
hal.identifierhal-00015003
hal.version1
hal.popularnon
hal.audienceInternationale
dc.title.itFluorescent silver oligomeric clusters and colloidal particles
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00015003v1
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