| Literature DB >> 12202824 |
H-G Boyen1, G Kästle, F Weigl, B Koslowski, C Dietrich, P Ziemann, J P Spatz, S Riethmüller, C Hartmann, M Möller, G Schmid, M G Garnier, P Oelhafen.
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.Entities:
Year: 2002 PMID： 12202824 DOI： 10.1126/science.1076248
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728