The structural modification of the host matrix induced by external treatments in ion-exchanged silicate glasses have not been studied rigorously, despite its importance in tailoring the performances of optical devices. Silicate glass layers prepared by Ag+-Na+ ion-exchange were annealed and irradiated with laser beam. The rearrangement of silica network and Ag clustering process during external treatments in silver-containing glasses were studied by Raman spectroscopy. Modifications of silica network microstructure in ion-exchanged and treated glasses were investigated by analyzing Raman band in between 700 and 1250 cm−1. External treatments result in the sequence of structural changes, which may be interpreted as the change in polymerizing units, appearance and disappearance of non-bridging oxygen centers in glass. The transformation of silver during external treatments was evidenced from the low-frequency Raman spectra. A final assignment of silica-network microstructure modifications due to cluster fragmentation with high energy laser irradiation is attained by using Raman spectral analyses.

Thermal annealing and laser induced structural rearrangement and silver state modification in Ag+-Na+ ion-exchanged silicate glasses studied by Raman spectroscopy

Cattaruzza, E.;Trave, E.;Gonella, F.;
2021-01-01

Abstract

The structural modification of the host matrix induced by external treatments in ion-exchanged silicate glasses have not been studied rigorously, despite its importance in tailoring the performances of optical devices. Silicate glass layers prepared by Ag+-Na+ ion-exchange were annealed and irradiated with laser beam. The rearrangement of silica network and Ag clustering process during external treatments in silver-containing glasses were studied by Raman spectroscopy. Modifications of silica network microstructure in ion-exchanged and treated glasses were investigated by analyzing Raman band in between 700 and 1250 cm−1. External treatments result in the sequence of structural changes, which may be interpreted as the change in polymerizing units, appearance and disappearance of non-bridging oxygen centers in glass. The transformation of silver during external treatments was evidenced from the low-frequency Raman spectra. A final assignment of silica-network microstructure modifications due to cluster fragmentation with high energy laser irradiation is attained by using Raman spectral analyses.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10278/3730613
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