http://www.cnr.it/ontology/cnr/individuo/prodotto/ID234661

ELECTRONIC CONFINEMENT OF SILVER NANOCLUSTERS IN Er3+-ACTIVATED SILICATE AND PHOSPHATE GLASSES (Contributo in volume (capitolo o saggio))

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ELECTRONIC CONFINEMENT OF SILVER NANOCLUSTERS IN Er3+-ACTIVATED SILICATE AND PHOSPHATE GLASSES (Contributo in volume (capitolo o saggio)) (literal)

Anno

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Alternative label

L. MINATI, G. SPERANZA, A. CHIAPPINI, A. CHIASERA, M. FERRARI, S. BERNESCHI, S. PELLI, G.C. RIGHINI (2009)
ELECTRONIC CONFINEMENT OF SILVER NANOCLUSTERS IN Er3+-ACTIVATED SILICATE AND PHOSPHATE GLASSES
World Scientific Publ. Co., Singapore (Singapore) in Synchrotron Radiation and Nanostructures, 2009
(literal)

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L. MINATI, G. SPERANZA, A. CHIAPPINI, A. CHIASERA, M. FERRARI, S. BERNESCHI, S. PELLI, G.C. RIGHINI (literal)

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FBK-IRST via Sommarive 18, 38050 Povo, Italy; CNR-IFN, CSMFO Lab. Via alla Cascata, 56/C, 38050 Povo-Trento, Italy; CNR, Department of Materials and Devices, via dei Taurini 19, 00185 Roma, Italy; MDF Lab., Nello Carrara Institute of Applied Physics, IFAC - CNR, Via Madonna del, Piano 10, 50019 Sesto Fiorentino (Firenze), Italy. (literal)

Titolo

ELECTRONIC CONFINEMENT OF SILVER NANOCLUSTERS IN Er3+-ACTIVATED SILICATE AND PHOSPHATE GLASSES (literal)

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Antonio Cricenti (Istituto di Struttura della Materia, Italy) By (author): Giorgio Margaritondo (Ecole Politechnique Federale de Lausanne, Switzerland) (literal)

Abstract

In this work the silver chemical state in Ag-exchanged Er3+ doped silicate and phosphate glasses is analyzed. X-Ray Photoelectron spectroscopy (XPS) shows that thermal annealing leads to a different behavior of silver atoms in these two systems. In silicate glasses silver aggregates in nanoparticles. In phosphate glasses silver is in an oxidized state and in very small metallic nanoparticles. These results are corroborated by the fact that the surface plasmon absorption band is observed in the absorption spectra of silicate glasses, whereas is absent in the case of the phosphate glasses. These evidences explain also the occurrence or the lack of Er3+ luminescence enhancement in the silicate and phosphate silver-exchanged glasses, respectively. (literal)

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