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Photon Trapping and the Enhancement of Electronic Excitation Energy Transfer Efficiency Caused by Colloidal Crystals
Author(s) -
Tsuchida Akira,
Ohi Yuji,
Takahashi Shinya,
Kimura Hiroshi,
Okubo Tsuneo
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201050211
Subject(s) - trapping , excitation , photon , energy transfer , colloid , materials science , atomic physics , colloidal particle , optoelectronics , chemical physics , molecular physics , optics , physics , chemistry , ecology , quantum mechanics , biology
Summary: The efficiency of electronic excitation energy transfer from photoexcited fluorescein to rhodamine 6G is enhanced by 2.26 times in an exhaustively deionized colloidal silica suspension. This enhancement is caused by the photon trapping effects due to the Bragg reflection of colloidal crystals formed in the suspension. The lower enhancement efficiency of 1.41 times observed for rhodamine B as an acceptor is attributed to the inefficient spectral overlap between donor fluorescence and acceptor absorption bands.