Spontaneous Formation of Dipolar Metal Nanoclusters

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

The adsorption of Ag$_3$ and Ag$_4$ clusters on the $α$-Al$_2$O$_3$(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

Materials Science, Other Condensed Matter

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/117451

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0610678
 http://arxiv.org/abs/cond-mat/0610678

Collections

arXiv