TITLE

Clustering of silver atoms in hydrogenated silver-sodium exchanged glasses

AUTHOR(S)

Miotello, A.; De Marchi, G.; Mattei, G.; Mazzoldi, P.; Quaranta, A.

PUB. DATE

April 2000

SOURCE

Applied Physics A: Materials Science & Processing;2000, Vol. 70 Issue 4, p415

SOURCE TYPE

Academic Journal

DOC. TYPE

Article

ABSTRACT

Abstract. The diffusional growth regime of silver clusters in hydrogenated silver-sodium exchanged glasses has been numerically analysed. The diffusion coefficients of the three elements that contribute to silver cluster formation, namely H, Ag[sup +], and Ag[sup 0], have been established. The activation energy of the reactant Ago diffusion coefficient is consistent in the three analysed different experimental results: Ag loss through evaporation, near-surface Ag accumulation, and optical absorption density. The calculated Ago diffusion coefficient accounts for the threshold time necessary to obtain a cluster size to give rise to a detectable absorption.

ACCESSION #

4720087

Tags: SILVER;  SODIUM;  DIFFUSION;  EVAPORATION

 

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