Metal-doped glasses were prepared by double ion implantation (Ag+Cu and Au+Cu) in silica glass. X-ray absorption spectroscopy was used to study the different oxidation states of the dopant metals and the possible formation of metal or alloy clusters. We present an investigation on co-implanted silica glass at the Cu K, Ag K and An L-III edges. The local atomic order around each dopant was determined. In particular, no evidence of metal alloying was found. Cu is mainly bound to O atoms of the glass, Ag mainly forms pure metallic clusters and Au is present as small metallic particles and isolated atoms.
EXAFS study on metal cluster doped silica glass obtained by ion implantation procedures
1998
Abstract
Metal-doped glasses were prepared by double ion implantation (Ag+Cu and Au+Cu) in silica glass. X-ray absorption spectroscopy was used to study the different oxidation states of the dopant metals and the possible formation of metal or alloy clusters. We present an investigation on co-implanted silica glass at the Cu K, Ag K and An L-III edges. The local atomic order around each dopant was determined. In particular, no evidence of metal alloying was found. Cu is mainly bound to O atoms of the glass, Ag mainly forms pure metallic clusters and Au is present as small metallic particles and isolated atoms.File in questo prodotto:
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