FRET-assisted organic dye molecules using in conjunction with colloidal quantum dots for bio-labelling

The paper presents Forster-type resonance energy transfer (FRET)-mediated light-harvesting of CdSe quantum dots for Atto Rhodamine 12 dye molecules using selective excitation wavelengths and achieved up to 4-fold enhancement of the Atto emission. Organic CdSe quantum dots are synthesized using hot injection method, and are emitting at 584 nm with a quantum yield of 31% that are carefully selected to spectrally match the absorption band of the acceptor dye molecules. It is shown that the strong lifetime modifications of the donor and acceptor molecules is the result of light-harvesting FRET, which will be important for bio-labelling.