Anticorrelation of Photoluminescence from Gold Nanoparticle Dimers with Hot-Spot Intensity.

ABSTRACT: Bulk gold shows photoluminescence (PL) with a negligible quantum yield of ∼10^-10, which can be increased by orders of magnitude in the case of gold nanoparticles. This bears huge potential to use noble metal nanoparticles as fluorescent and unbleachable stains in bioimaging or for optical data storage. Commonly, the enhancement of the PL yield is attributed to nanoparticle plasmons, specifically to the enhancements of scattering or absorption cross sections. Tuning the shape or geometry of gold nanostructures (e.g., via reducing the distance between two nanoparticles) allows for redshifting both the scattering and the PL spectra. However, while the scattering cross section increases with a plasmonic redshift, the PL yield decreases, indicating that the common simple picture of a

SUBMITTER: Sivun D 

PROVIDER: S-EPMC5108029 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature