Abstract
We report the time evolution of declustering phenomenon of metal nanoclusters of size less than 2nm grown in a glassy medium. The clusters are found to be of core shell in structure and the shell formation is inevitable and accompanied by the clusters of such smaller size. Clusters having two different size distributions are grown during the aging period of the sample showing surface plasmon resonant (SPR) absorptions peaked at the wavelengths ∼460 and ∼600nm. We explain the formation of secondary clusters and the cluster decay process based on the SPR of silver clusters formed in an ion-exchanged silicate glass using a generalized Mie scattering theory and a supporting thermodynamic description.
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