Spatial imaging of modifications to fluorescence lifetime and intensity by individual Ag nanoparticles

Details Spatial imaging of modifications to fluorescence lifetime and intensity by individual Ag nanoparticles Spatial imaging of modifications to fluorescence lifetime and intensity by individual Ag nanoparticles

2007-07-11

arxiv.org/abs/0707.1680v1

Physics

Condensed Matter

Other Condensed Matter

3 pages, 2 figures, submitted Applied Physics Letters

Scientific paper

10.1063/1.2789700

Highly ordered periodic arrays of silver nanoparticles have been fabricated which exhibit surface plasmon resonances in the visible spectrum. We demonstrate the ability of these structures to alter the fluorescence properties of vicinal dye molecules by providing an additional radiative decay channel. Using fluorescence lifetime imaging microscopy (FLIM), we have created high resolution spatial maps of the molecular lifetime components; these show an order of magnitude increase in decay rate from a localized volume around the nanoparticles, resulting in a commensurate enhancement in the fluorescence emission intensity.

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