Ag2SO4 decorated with fluorescent Agn nanoclusters

Cheng Fang, Joseph Shapter, Nicolas Voelcker, Amanda Ellis

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)


    Here we report on the production of an Ag 2 SO 4 /Ag 2 O mixed-grain powder during the anodization of Ag foil in a HF-H 2 SO 4 electrolyte. We propose that there are three competing reactions during the anodization process: (i) the production of Ag 2 O at the Ag foil anode surface from the presence of water in the electrolyte, (ii) the dissolution of the Ag 2 O in the presence of HF releasing Ag + ions, (iii) the precipitation of Ag + and SO 4 2- ions, as Ag 2 SO 4 on the Ag foil anode surface. This co-precipitation/dissolution process ultimately results in a mixed-grain powder. We then show that the Ag 2 O embedded within the mixed-grain is photo-decomposed to produce highly fluorescent silver nanoclusters (Ag n ) which decorate the Ag 2 SO 4 crystals. The Ag 2 SO 4 salt offers a stable matrix for the photo-decomposed Ag n nanoclusters to emit their strong fluorescence.

    Original languageEnglish
    Pages (from-to)77-81
    Number of pages5
    JournalApplied Surface Science
    Publication statusPublished - 1 Apr 2013


    • Electrochemistry
    • Fluorescence
    • Silver nanoclusters
    • Silver sulphate/silver oxide mixed-grain powder


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