No abstract

A change of behavior: Deposition of atomic oxygen on Au nanoparticles larger and smaller than about 0.7 nm (as determined by STM, see image) in height results in the formation of oxygen species that exhibit very different oxidation behaviors toward CO at room temperature. X‐ray photoelectron spectroscopy has been used to explain these differences.

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Even–odd effects: Oxidation patterns of the mass‐selected Aun (n=2–10) clusters deposited on silica surfaces are reported. An additional Au atom can drastically change the oxidation pattern of the Au clusters. Au5 and Au7 (see picture) are suggested to be highly stable upon oxygen exposure. Formation of AuO bonds is not observed.

No abstract