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29 September 2017 Fluorescent noncovalent functionalization of graphene by surface-confined supramolecular self-assembly: towards nano-optics on graphene (Conference Presentation)
Sylvain Le Liepvre, Ping Du, Fabrice Mathevet, David Kreher, Fabrice Charra, André-Jean Attias
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Proceedings Volume 10355, Nanobiosystems: Processing, Characterization, and Applications X; 1035509 (2017) https://doi.org/10.1117/12.2276344
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States
Abstract
The realization of light-emitting devices based on emitters-graphene assemblies remains challenging, since graphene is known as a strong quencher of electronic excited states through excitation transfer between the adsorbed emitters and the graphene. Hence, a strategy is needed to avoid this transfer through introduction of an accurately controlled emitter–to-graphene electron barrier, for which planar flat-lying molecules are inefficient. Here, the quenching of the fluorescence of the adsorbed dye by the adjacent graphene is hindered at the molecular scale based on a spacer approach, through a specifically designed dual-functionalized self-assembling building block. This 3D tecton presents two faces, one forming a noncovalent graphene-binding pedestal and the other carrying a dye group linked by a spacer to the pedestal. The spontaneous ordering of the adsorbed layer is investigated by scanning tunneling microscopy, whereas the resulting optical properties of the whole graphene–dye hybrid system are characterized by absorption and fluorescence spectroscopies.
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Sylvain Le Liepvre, Ping Du, Fabrice Mathevet, David Kreher, Fabrice Charra, and André-Jean Attias "Fluorescent noncovalent functionalization of graphene by surface-confined supramolecular self-assembly: towards nano-optics on graphene (Conference Presentation)", Proc. SPIE 10355, Nanobiosystems: Processing, Characterization, and Applications X, 1035509 (29 September 2017); https://doi.org/10.1117/12.2276344
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KEYWORDS
Graphene
Nano optics
Absorption
Luminescence
Molecular self-assembly
Molecules
Optical properties
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