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Title: Effect of nanoscale dielectric environments on concentration quenching
Abstract We have studied the dependence of concentration quenching of luminescence (donor–acceptor energy transfer) on the thickness d of dye-doped polymeric films (HITC:PMMA) and found its strong inhibition at small values of d . This phenomenon is tentatively explained by a limited number of acceptors, which donors’ excitation can reach in thin samples, if the film’s thickness is comparable to the diffusion length of the energy transfer. The latter mechanism, along with effective reduction of the dye concentration, is responsible for an inhibition of the concentration quenching of dye molecules impregnating porous alumina membranes. The elongation of emission kinetics in thick (≥3 μm) HITC:PMMA films is cautiously attributed to the samples’ crystallinity.
Authors:
; ; ; ; ; ; ;
Award ID(s):
1856515
Publication Date:
NSF-PAR ID:
10339080
Journal Name:
Nanophotonics
Volume:
10
Issue:
14
Page Range or eLocation-ID:
3659 to 3665
ISSN:
2192-8614
Sponsoring Org:
National Science Foundation
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