Abstract
A strong enhancement in fluorescence of Rhodamine B dye in the vicinity of silver monodisperse nanoparticles is presented. The fluorescence of the dye increased as much as by 23 times in the presence of monodispersed silver nanoparticles. The fluorescence enhancement due to monodispersed silver nanoparticles was about 2–3 times larger than in the presence of polydispersed silver nanoparticles. The additional enhancement is explained in terms of emergence of uniform and large local electromagnetic field induced by surface plasmon resonance around an ensemble of monodispersed silver nanoparticles.
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