Regensburg 2007 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 6: Glass II (joint session with DY)

DF 6.2: Vortrag

Dienstag, 27. März 2007, 14:50–15:10, H23

Characterization of silver nanoparticles in glasses by X-ray absorption spectroscopy — •Jörg Haug, Manfred Dubiel, Holger Kruth, and Angelika Chassé — Department of Physics, Martin Luther University Halle-Wittenberg, Friedemann-Bach-Platz 6, D-06108 Halle, Germany

Glasses containing metal nanoparticles are of interest because of their specific linear and non-linear optical properties. In the present work, there are represented structural investigations of Ag nanoparticles as well as of neighbourhood of Ag ions embedded in the glass matrix by means of EXAFS spectroscopy at the Ag K-edge. In a first step, EXAFS investigations are reported concerning the thermal expansion behaviour of bulk silver to test this method for investigations of nanoparticles. In a second step, in situ experiments at elevated temperatures of particle generation are described in order to evaluate the elementary processes of particle formation as well as the specific structure of nanoscaled particles.