Formation of Ag nanoparticles and enhancement of Tb<sup>+3</sup> luminescence in Tb and Ag co-doped lithium-lanthanum-aluminosilicate glass

Patryk Piasecki; Ashley Piasecki; Zhengda Pan; Richard Mu; Steven H. Morgan

doi:10.1117/1.3528943

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1 December 2010 Formation of Ag nanoparticles and enhancement of Tb⁺³ luminescence in Tb and Ag co-doped lithium-lanthanum-aluminosilicate glass

Patryk Piasecki, Ashley Piasecki, Zhengda Pan, Richard Mu, Steven H. Morgan

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J. of Nanophotonics, 4(1), 043522 (2010). https://doi.org/10.1117/1.3528943

Abstract

Tb³⁺ and Ag co-doped glass nano-composites were synthesized in a glass matrix Li₂O-LaF₃-Al₂O₃-SiO₂ (LLAS) by a melt-quench technique. The growth of Ag nanoparticles (NPs) was controlled by a thermal annealing process. A broad absorption band peaking at about 420 nm was observed due to surface plasmon resonance (SPR) of Ag NPs. The intensity of this band grows with increasing annealing time. The transmission electron microscopic image (TEM) reveals the formation of Ag NPs in glass matrix. Photoluminescence (PL) emission and excitation spectra were measured for glass samples with different Ag concentrations and different annealing times. Plasmon enhanced Tb³⁺ luminescence was observed at certain excitation wavelength regions. Luminescence quenching was also observed for samples with high Ag concentration and longer annealing time. Our luminescence results suggest that there are two competitive effects, enhancement and quenching, acting on Tb³⁺ luminescence in the presence of Ag NPs. The enhancement of Tb³⁺ luminescence is mainly attributed to local field effects due to SPR. The quenching of luminescence suggests an energy transfer from Tb³⁺ ions to Ag NPs.

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Patryk Piasecki, Ashley Piasecki, Zhengda Pan, Richard Mu, and Steven H. Morgan "Formation of Ag nanoparticles and enhancement of Tb⁺³ luminescence in Tb and Ag co-doped lithium-lanthanum-aluminosilicate glass," Journal of Nanophotonics 4(1), 043522 (1 December 2010). https://doi.org/10.1117/1.3528943

Published: 1 December 2010

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