We have identified, in erbium-doped silica with SnO2 nanocrystals, excitation-diffusion processes restricted to the single nanocrystal. Time-resolved measurements of erbium infrared luminescence excited by energy transfer via nanocrystal excitation, together with the identification and quantification of the nanophase-related Er3+ variety by its electron paramagnetic resonance, have allowed us to analyze the dependence of the excitation decay rate on the number of ions per nanoparticle and to reveal the effects of the discrete spatial domain composed by nanocrystals. Finally, a nonlinear relation is derived to describe the effects of Förster energy transfer in disconnected nanosystems. © 2009 The American Physical Society.

Brovelli, S., Chiodini, N., Meinardi, F., Monguzzi, A., Lauria, A., Lorenzi, R., et al. (2009). Confined diffusion of erbium excitations in SnO2 nanoparticles embedded in silica: A time-resolved infrared luminescence study. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 79(15) [10.1103/PhysRevB.79.153108].

Confined diffusion of erbium excitations in SnO2 nanoparticles embedded in silica: A time-resolved infrared luminescence study

BROVELLI, SERGIO;CHIODINI, NORBERTO;MEINARDI, FRANCESCO;MONGUZZI, ANGELO MARIA;LAURIA, ALESSANDRO;LORENZI, ROBERTO;VODOPIVEC, BRUNO;PALEARI, ALBERTO MARIA FELICE
2009

Abstract

We have identified, in erbium-doped silica with SnO2 nanocrystals, excitation-diffusion processes restricted to the single nanocrystal. Time-resolved measurements of erbium infrared luminescence excited by energy transfer via nanocrystal excitation, together with the identification and quantification of the nanophase-related Er3+ variety by its electron paramagnetic resonance, have allowed us to analyze the dependence of the excitation decay rate on the number of ions per nanoparticle and to reveal the effects of the discrete spatial domain composed by nanocrystals. Finally, a nonlinear relation is derived to describe the effects of Förster energy transfer in disconnected nanosystems. © 2009 The American Physical Society.
Articolo in rivista - Articolo scientifico
silica, nanoparticles, photoluminescence;
English
Brovelli, S., Chiodini, N., Meinardi, F., Monguzzi, A., Lauria, A., Lorenzi, R., et al. (2009). Confined diffusion of erbium excitations in SnO2 nanoparticles embedded in silica: A time-resolved infrared luminescence study. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 79(15) [10.1103/PhysRevB.79.153108].
Brovelli, S; Chiodini, N; Meinardi, F; Monguzzi, A; Lauria, A; Lorenzi, R; Vodopivec, B; Mozzati, M; Paleari, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/9039
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