Ven. 16/02/2018 11:00 Andromede, Bâtiment 11, Etage 3
GAUFRÈS Etienne (ONERA Chatillon)
Optical properties of dyes confined into carbon and boron nitride nanotubes
(Nanostructures & Spectroscopie)
The inner cavity of nanotubes attracted a lot of interest as template for the encapsulation of elongated dyes molecules, such as polythiophenes. Indeed, the 1D confinement drives the stacking of the molecules inside and enables original aggregation effects on their optical properties (1,2). When encapsulated inside carbon nanotube, organics dyes such as 6T exhibits for example a strong and specific Raman scattering but their luminescence is efficiently quenched by the nanotube (3). Here we show that the same dyes, when encapsulated inside boron nitride nanotubes (6T@BNNT) exhibits strong luminescence (4). Photoluminescence imaging experiments on individualized 6T@BNNT deposited on substrate show that the encapsulation also circumvent the photobleaching issue over days under continuous photo-excitation. Finaly we show that these hybrid materials can act as robust nanoprobes with reduced toxicity in living system such as Daphnia Pulex, for multimodal imaging. (4)
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