Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene
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- 作者：Fran莽ois Federspiel ; Guillaume Froehlicher ; Michel Nasilowski ; Silvia Pedetti ; Ather Mahmood ; Bernard Doudin ; Serin Park ; Jeong-O Lee ; David Halley ; Beno卯t Dubertret ; Pierre Gilliot ; St茅phane Berciaud
- 刊名：Nano Letters
- 出版年：2015
- 出版时间：February 11, 2015
- 年：2015
- 卷：15
- 期：2
- 页码：1252-1258
- 全文大小：501K
- ISSN：1530-6992
文摘
The near-field Coulomb interaction between a nanoemitter and a graphene monolayer results in strong F枚rster-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/d4. 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.