Plasmon enhanced silver quantum cluster fluorescence for biochemical applications

S. Bernard, J.P. Kutter, Klaus Bo Mogensen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    Fluorescence microscopy of individual silver quantum clusters on the surface of silver nanoparticles reveals strong photoactivated emission under blue light excitation [1-4]. In this work, silver nanoparticles are produced by annealing silver thin films deposited on a glass substrate and silver quantum clusters are subsequently synthesized at the surface of the nanoparticles by photoactivation in presence of Ag+ cations in solution. The photogeneration of these silver quantum clusters leads to a great increase in the fluorescent signal.
    This photoactivated surface can then be used for sensing purposes. It was found, that in presence of a strong nucleophile (such as CN-), silver quantum clusters are dissolved into non-fluorescing AgCN complexes, resulting in a fast and observable decrease of the fluorescent signal.
    Original languageEnglish
    Title of host publicationProceedings of Nanotech 2014
    Number of pages4
    Publication date2014
    Publication statusPublished - 2014
    EventNanotech 2014: Nanotechnology Conference and Expo - Gaylord National Hotel and Convention Center, Washington DC, United States
    Duration: 15 Jun 201418 Jun 2014


    ConferenceNanotech 2014
    LocationGaylord National Hotel and Convention Center
    Country/TerritoryUnited States
    CityWashington DC


    • Silver quantum clusters
    • Silver nanoparticles
    • Plasmon enhanced fluorescence
    • Optical cyanide detection


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