title: Distance dependence of the energy transfer rate from a single semiconductor nanostructure to graphene.
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.
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg and NIE, UMR 7504, Université de Strasbourg and CNRS , 23 rue du Lœss, BP43, 67034 Strasbourg Cedex 2, France.
authors.forename: François
authors.initials: F
authors.lastname: Federspiel
authors.forename: Guillaume
authors.initials: G
authors.lastname: Froehlicher
authors.forename: Michel
authors.initials: M
authors.lastname: Nasilowski
authors.forename: Silvia
authors.initials: S
authors.lastname: Pedetti
authors.forename: Ather
authors.initials: A
authors.lastname: Mahmood
authors.forename: Bernard
authors.initials: B
authors.lastname: Doudin
authors.forename: Serin
authors.initials: S
authors.lastname: Park
authors.forename: Jeong-O
authors.initials: JO
authors.lastname: Lee
authors.forename: David
authors.initials: D
authors.lastname: Halley
authors.forename: Benoît
authors.initials: B
authors.lastname: Dubertret
authors.forename: Pierre
authors.initials: P
authors.lastname: Gilliot
authors.forename: Stéphane
authors.initials: S
authors.lastname: Berciaud
keywords: FRET; Graphene; dimensionality; heterostructures; quantum dots; quantum wells; resonant energy transfer; semiconductor nanocrystals; semiconductor nanoplatelets; single molecule luminescence