Distance dependence of the energy transfer rate from a single semiconductor nanostructure to graphene.
Nano Lett
; 15(2): 1252-8, 2015 Feb 11.
Article
en En
| MEDLINE
| ID: mdl-25607231
ABSTRACT
The near-field Coulomb interaction between a nanoemitter and a graphene monolayer results in strong Förster-type resonant energy transfer and subsequent fluorescence quenching. Here, we investigate the distance dependence of the energy transfer rate from individual, (i) zero-dimensional CdSe/CdS nanocrystals and (ii) two-dimensional CdSe/CdS/ZnS nanoplatelets to a graphene monolayer. For increasing distances d, the energy transfer rate from individual nanocrystals to graphene decays as 1/d(4). In contrast, the distance dependence of the energy transfer rate from a two-dimensional nanoplatelet to graphene deviates from a simple power law but is well described by a theoretical model, which considers a thermal distribution of free excitons in a two-dimensional quantum well. Our results show that accurate distance measurements can be performed at the single particle level using graphene-based molecular rulers and that energy transfer allows probing dimensionality effects at the nanoscale.
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MEDLINE
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En
Revista:
Nano Lett
Año:
2015
Tipo del documento:
Article
País de afiliación:
Francia