From photoluminescence emissions to plasmonic properties in platinum nanoparticles embedded in silica by ion implantation
Por:
Bornacelli, J., Silva-Pereyra, H. G., Rodriguez-Fernandez, L., Avalos-Borja, M., Oliver, A.
Publicada:
1 nov 2016
Resumen:
We have studied photoluminescence emission and optical absorption from platinum nanoparticles (Pt-nps) embedded in a silica matrix obtained by ion implantation. The Pt ions were implanted at 2 MeV and the nanoclusters were nucleated after thermal treatment at 600, 800, and 1100 °C under two different atmospheres: argon gas and a reducing atmosphere compound of H2 and N2. The luminescent spectrum is broader (400–600 nm) and is peaked at 530 nm, but its intensity decreases as the annealing temperature increases. However, at high annealing temperatures, a Mie resonance at 220 nm emerges in the absorption spectrum. We then observed a transition between two optical properties in a system of Pt-nps embedded in silica: from molecule-like properties such as photoluminescence emission to localized surface plasmon absorption. © 2016 Elsevier B.V.
Filiaciones:
Bornacelli, J.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Silva-Pereyra, H. G.:
IPICyT, Div Mat Avanzados, Camino la Presa San Jose 2055, San Luis Potosi 78216, Slp, Mexico
Rodriguez-Fernandez, L.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Avalos-Borja, M.:
IPICyT, Div Mat Avanzados, Camino la Presa San Jose 2055, San Luis Potosi 78216, Slp, Mexico
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, A Postal 2681, Ensenada, Baja California, Mexico
Oliver, A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
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