Highly efficient nonradiative energy transfer mediated light harvesting in water using aqueous CdTe quantum dot antennas.
Opt Express
; 18(10): 10720-30, 2010 May 10.
Article
en En
| MEDLINE
| ID: mdl-20588924
ABSTRACT
We present light harvesting of aqueous colloidal quantum dots to nonradiatively transfer their excitonic excitation energy efficiently to dye molecules in water, without requiring ligand exchange. These as-synthesized CdTe quantum dots that are used as donors to serve as light-harvesting antennas are carefully optimized to match the electronic structure of Rhodamine B molecules used as acceptors for light harvesting in aqueous medium. By varying the acceptor to donor concentration ratio, we measure the light harvesting factor, along with substantial lifetime modifications of these water-soluble quantum dots, from 25.3 ns to 7.2 ns as a result of their energy transfer with efficiency levels up to 86%. Such nonradiative energy transfer mediated light harvesting in aqueous medium holds great promise for future quantum dot multiplexed dye biodetection systems.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Agua
/
Puntos Cuánticos
/
Dispositivos Ópticos
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Turquía