Abstract
Fluorescence blinking of silver nanoparticle films is observed when illuminated with redlight (635 nm). The observed power-law off-time distribution is attributed to randomsurface diffusion and subsequent agglomeration of atomic Ag leading to the formation ofphoto-active Ag nanoclusters. These nanoclusters can in turn diffuse randomly to formnon-emitting Ag clusters after aggregation with another Ag species. This is revealed in thepower-law on-time distribution. Silver oxides found on the surfaces of Ag nanostructuresare important for photoblinking to take place since nanostructures with a protective layerof polymeric citrate or cetyltrimethylammonium bromide (CTAB) against atmosphericO2 do not display obvious emission intermittency.
Published Version
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