Effect of Multilayer Spherical Nanoparticles with a Conducting Core on Fluorescence Quenching of Organic Luminophores

Abstract

UDC 535.372; 535.354 The effect of multilayer nanoparticles consisting of a conducting spherical core and two shells, dielectric and metallic, on nonradiative energy transfer from organic luminophore molecules to acceptor molecules is studied. The dipole polarizability of the nanoparticle is examined with and without taking into account the degeneracy of the electron gas of the conducting components. The rate of transfer of the energy of electronic excitation between molecules near multilayer nanoparticles and the rate of transfer directly to the nanoparticles are calculated in the quasistatic (near fi eld) approximation of electrodynamics. Multilayer nanoparticles are found to have a signifi cant effect on the decay kinetics of excited singlet states of the donor molecules.