Structure of supported Ag nanoclusters on silicon surfaces, theory and experiment
Abstract
We report a combined theoretical and experimental study of substrate lattice effect on small metal cluster structure at the early stage of Volmer-Weber growth. Ag on SI(100) and Si(111) surfaces are used as a model. Multiscale computation was carried to model the cluster structure using EAM potential and interfacial potential from first principle calulations. On Si(111), we found most clusters are crystallites for clusters of sveral nanometer in diameter. On Si(100) most clusters are multiple twinned and assembles the structure of free clusters. Electron diffraction evidence together with comparison with theory will be presented as the evidences. Significance of these results will be discussed in the framework of competition between adatom-adatom and adatom-substrate interactions.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MAR.K3009Z