Fluorescence decay enhancement and FRET inhibition in self-assembled hybrid gold CdSe/CdS/CdZnS colloidal nanocrystal supraparticles

V Blondot (1) , C Arnold (1) , Aymeric Delteil (1) , D Gérard (1) , A Bogicevic (2) , T Pons (2) , N Lequeux (2) , J-P Hugonin (3) , J-J Greffet (3) , S Buil (1) , J-P Hermier (1)

1 GEMAC - Groupe d'Etude de la Matière Condensée
2 LPEM - Laboratoire de Physique et d'Etude des Matériaux (UMR 8213)
3 Laboratoire Charles Fabry / Nanophotonique

We report on the synthesis of hybrid light emitting particles with a diameter ranging between 100 and 500 nm, consisting in a compact semiconductor CdSe/CdS/CdZnS nanocrystal aggregate encapsulated by a controlled nanometric size silica and gold layers. We first characterize the Purcell decay rate enhancement corresponding to the addition of the gold nanoshell as a function of the particle size and find a good agreement with the predictions of numerical simulations. Then, we show that the contribution corresponding to Förster resonance energy transfer is inhibited.

Domains: Physics [physics]

V Blondot, C Arnold, Aymeric Delteil, D Gérard, A Bogicevic, et al.. Fluorescence decay enhancement and FRET inhibition in self-assembled hybrid gold CdSe/CdS/CdZnS colloidal nanocrystal supraparticles. Optics Express, 2023, 31, pp.4454. ⟨10.1364/oe.476441⟩. ⟨hal-03955656⟩