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. 2011 Jul 13;2(1-6):1–19. doi: 10.1007/s12645-011-0015-7

Fig. 10.

Fig. 10

FRET mechanism. a Energy diagram for the non-radiative energy transfer. S0(D) and S1(D) are the ground and first excited singlet states of the donor; kD and kD/A are the rate constants for the radiative and non-radiative energy transfer processes, respectively. Solid lines depict photon-participated transitions; dashed lines depict resonant transitions in the electronic structures of the donor and acceptor. b Further utility of QDs have been found in labeling of nucleus in live cells, however, this issue has not been not fully studied. (Geissbuhler 2005; Drbohlavova et al. 2009)