The donor-acceptor complexes of quantum dots and ionic perylene diimides for ratiometric detection of double-stranded DNA

This communication presents a new FRET donor-acceptor system based on hybrid inorganic-organic complexes formed by quantum dots (QDs) and perylene diimides (PDIs). The ratio of the emission of QDs and the FRET emission of PDIs changes as the ratio of the donor and the acceptor changes. This donor-acceptor system can be used for ratiometric detection of double-stranded DNA.