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Enhancement of Förster Energy Transfer within a Microspherical Cavity
Author(s) -
Fujiwara Hideki,
Sasaki Keiji,
Masuhara Hiroshi
Publication year - 2005
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200500318
Subject(s) - energy transfer , förster resonance energy transfer , materials science , optics , chemistry , nanotechnology , fluorescence , chemical physics , physics
Energy transfer from pyrene to perylene molecules co‐doped within a poly(methyl methacrylate) latex microsphere was drastically accelerated relative to free space. Fluorescence spectra of the microspheres showed that the relative emission intensities of pyrene and perylene changed with the sphere diameter. Analyses of emission decay profiles clarified that Förster‐type energy‐transfer processes were induced and that the transfer rates increased within the microspherical cavity. This enhancement can be ascribed not only to the quantum electrodynamic effects on the pyrene emission rate, but also the cavity effect of increasing the overlapping factor between donor emission and acceptor absorption spectra.