Spontaneous Formation of Dipolar Metal Nanoclusters
Materials Science
2007-05-23 v1 Other Condensed Matter
Abstract
The adsorption of Ag and Ag clusters on the -AlO(0001) surface is explored with density functional theory. Within each adsorbed cluster, two different cluster-surface interactions are present. We find that silver clusters simultaneously form both ionic bonds with surface oxygen and intermetallic bonds with surface aluminum. The simultaneous formation of disparate electronic structure motifs within a single metal nanoparticle is termed a "dipolar nanocluster". This coexistence is ascribed to the similar bond enthalpies of Ag--Al and Ag--O bonds, and its importance for nanoparticle catalysis is highlighted.
Keywords
Cite
@article{arxiv.cond-mat/0610678,
title = {Spontaneous Formation of Dipolar Metal Nanoclusters},
author = {Elizabeth A. Sokol and Sara E. Mason and Valentino R. Cooper and Andrew M. Rappe},
journal= {arXiv preprint arXiv:cond-mat/0610678},
year = {2007}
}