Characterization of nanoscale silver particles in glasses by temperature-dependent EXAFS spectroscopy

被引：26

作者：

Dubiel, M

Brunsch, S

Tröger, L

机构：

[1] Univ Halle Wittenberg, Dept Phys, D-06108 Halle, Germany

[2] Hamburger Synchrontronstschlungslab, Deutsch Elektronensynchrotron, D-22603 Hamburg, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 22期

关键词：

D O I：

10.1088/0953-8984/12/22/310

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The structural parameters of nanoscale silver particles embedded in a silicate glass matrix have been determined by temperature-dependent EXAFS spectroscopy at the Ag K edge for two particle sizes of 2.5 and 6 nm. EXAFS measurements allowed us to probe both the oxygen environment of silver ions separated within the glass matrix and the structure of precipitated silver particles. The lattice parameter of the Ag particles showed an unusual dilatation of the silver structure that is a result of the glass cooling process. Furthermore, an increase was found of static and dynamic Debye-Waller factors as well as of the thermal expansion coefficient compared with bulk Ag material. The experiments demonstrate that the behaviour of metal particles incorporated into a glass matrix reflects size effects of nanoscaled particles and the influence of the surrounding matrix.

引用

页码：4775 / 4789

页数：15

共 36 条

[1]

Ankudinov A. L., 1996, THESIS U WASHINGTON

[2] BONDING ON SURFACES - THE SEXAFS POINT-OF-VIEW [J].