Oxidation-Resistant Gold-55 Clusters
Top Cited Papers
- 30 August 2002
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 297 (5586) , 1533-1536
- https://doi.org/10.1126/science.1076248
Abstract
Gold nanoparticles ranging in diameter from 1 to 8 nanometers were prepared on top of silicon wafers in order to study the size dependence of their oxidation behavior when exposed to atomic oxygen. X-ray photoelectron spectroscopy showed a maximum oxidation resistance for “magic-number” clusters containing 55 gold atoms. This inertness is not related to electron confinement leading to a size-induced metal-to-insulator transition, but rather seems to be linked to the closed-shell structure of such magic clusters. The result additionally suggests that gold-55 clusters may act as especially effective oxidation catalysts, such as for oxidizing carbon monoxide.Keywords
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