Comparative efficiency of energy transfer from CdSe-ZnS quantum dots or nanorods to organic dye molecules.
Fiche publication
Date publication
janvier 2012
Journal
Chemphyschem : a European journal of chemical physics and physical chemistry
Auteurs
Membres identifiés du Cancéropôle Est :
Pr NABIEV Igor
Tous les auteurs :
Hardzei M, Artemyev M, Molinari M, Troyon M, Sukhanova A, Nabiev I
Lien Pubmed
Résumé
Fluorescence resonance energy transfer (FRET) in conjugates of CdSe-ZnS semiconductor nanocrystals of different shapes (FRET donors) and an Alexa Fluor organic dye (FRET acceptors) is examined. The dye molecules are chemically conjugated with quantum dots (QDs) or nanorods (NRs) in dimethyl sulfoxide colloidal solutions, and FRET efficiency in the purified conjugates is measured. The FRET from NR to a single dye molecule is less efficient than that of the QD-dye conjugates and this effect is explained in terms of distance-limited energy-transfer rate in the case of a point-like acceptor and extended donor dipoles. However, the larger surface area of NRs allows for many more dye acceptors to be bound, and the total FRET efficiency in NR-dye conjugates approaches those of QD-dye conjugates.
Référence
Chemphyschem. 2012 Jan;13(1):330-5