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FRET Relay. QD complexes consisting of a fluorophore (A647) and Terbium (Tb) are excited with incident light causing QD and A647 FRET2-basedbased light emission. After a 55 μs time gate, the excited Tb continues to excite the QD via FRET1, causing further emissions from both the QD and A647 FRET2. Reprinted with permission from [70]. ©2012 American Chemical Society.
