Solution Processed, Versatile Multilayered Structures
for the Generation of Metal-Enhanced Fluorescence
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Abstract
We present an all-solution processed
multilayered structure completely
obtained via spin-coating, which can be used to study and optimize
the phenomenon of metal-enhanced fluorescence. Indeed, the electromagnetic
interactions occurring between fluorescent probes and localized surface
plasmons typical of metal nanoparticles (NPs), which influence the
fluorescence quantum yield, are strongly dependent on the nanoparticle/molecule
distance. The platform proposed here offers unique advantages in terms
of processability, allowing a fine-tuning of such a distance in a
single deposition step. Fluorescence versus fluorophore/AuNP spacing
curves are shown for two organic systems, namely, a perylene-based
dye dispersed in a polymer matrix and a polyconjugated polymer (poly(3-hexylthiophene)),
interacting with a nanostructured gold thin film. In both cases, optimal
distances and enhancement factors have been measured