Abstract
We present an EXAFS study on Ag-doped soda-lime glass waveguides obtained by ion-exchange and treated by low-mass ion-irradiation to promote the formation of metallic clusters. For differently prepared samples we have determined the Ag local order before and after the treatment. In the as-exchanged glasses Ag is coordinated with O at a distance significantly shorter than the NaO bond length in the unexchanged glass. In irradiated samples we found the formation of metal aggregates. Structural parameters of clusters in high-temperature irradiated sample are compatible with a compressed fcc structure while in room-temperature irradiated specimen a more complicated structure comes out.
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