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. 2021 Dec 9;269:120702. doi: 10.1016/j.saa.2021.120702

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© 2021 Published by Elsevier B.V.

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Fig. 1 — (a) The fundamental mechanism of FRET that involves a transfer of energy form an excited donor to a nearby acceptor in a non-radiative fashion through long-range dipole–dipole interactions; (b) spectral overlap between emission spectrum of CdTe/ZnS QDs as a donor and absorption spectrum of BHQ₂ as an acceptor that leads to FRET; C) A schematic of DNA-conjugated CdTe/ZnS QDs nanoprobe for detection of complementary (target- DNA) derived from Covid-19 virus genome.