Intermolecular nonradiative energy transfer in clusters with plasmonic nanoparticles

Abstract

The influence of carbon (fullerenes, nanotubes) and metal (Ni, Co, Cu, Ag) nanoparticles on the nonradiative electronic excitation energy transfer between the molecules of organic dyes (acrylic orange as a donor and Nile blue as an acceptor) in alcohol solutions of polyvinylbutyral is studied. It is found that, at particular concentrations of the mixture components, plasmonic nanoparticles affect the nonradiative electronic excitation energy transfer, which is manifested in an increase in the intensity of sensitized fluorescence of acceptors with simultaneous quenching of the fluorescence of donors. A very simple model is proposed to illustrate the observed redistribution of luminescence intensity between the spectral bands of the general spectrum. Molecular-dynamic calculations of the structure of nanocomposites performed for the same purpose confirmed the formation of associated molecular plasmonic complexes fixed by macrochain links.