Berlin 2005 – wissenschaftliches Programm
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DS: Dünne Schichten
DS 8: Ionen-Festkörper-Wechselwirkung I
DS 8.5: Vortrag
Samstag, 5. März 2005, 16:15–16:30, TU HS107
Ion-beam induced nanosized silver metal clusters in glass — •H.-E. Mahnke1, B. Schattat1,2, V. Koteski3 und N. Novakovic1,3 — 1Ionenstrahllabor ISL, Hahn-Meitner-Institut Berlin — 2Institut für Strahlenphysik Stuttgart — 3VINČA Institute Belgrade
We have studied the formation of silver metal clusters in soda lime glass induced by high-energy heavy ion irradiation at ISL, extending an earlier investigation by Battaglin et al. (NIM B200 (2003) 185) with He ions to much higher electronic energy losses. The metal cluster formation was detected with X-ray absorption spectroscopy (EXAFS) in fluorescence mode. Prior to the ion irradiation, silver has been introduced into the glass by a Ag-alkali ion-exchange process. The Ag containing glass platelets with a thickness of 0.15 mm were ion irradiated with 600-MeV Au ions with fluences between 1 × 1012 and 1 × 1013 ions/cm2. Following a thermal treatment of either 250 ∘C annealing under reducing atmosphere of Ar with a few % H2 for 5 hours or at 340 ∘C for 30 minutes (the same temperature and time at which the Ag was introduced by the exchange process), the glass samples were analysed by EXAFS at the X1 beamline at Hasylab for the local structure around Ag atoms in the glass. While Ag is originally incorporated into an oxidic environment, ion irradiation combined with an annealing treatment afterwards leads to the formation of Ag in the metallic form.