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- W1970339923 abstract "This paper reports a study on the surface reconstruction on Cu(111) induced by a hyperthermal oxygen molecular beam (HOMB) at room temperature (RT). HOMB incidence at translational energies (Ei) ≥ 0.5 eV induced surface reconstruction to the |−13 22| structure for an O coverage (Θ) ≥ 0.27 monolayer (ML). On the other hand, long-range-ordered structures were not formed even at Θ ≈ 0.4 ML for the backfilling of thermal O2 at RT. No surface reconstruction was induced at Ei ≤ 0.23 eV where the attainable Θ value was 0.27 ML for the O2 exposures below 1018 molecules/cm2. Translational energy above 0.5 eV is required for the dissociative adsorption of O2 and the resulting surface reconstruction at Θ ≥ 0.27 ML. The O-1s XPS peak for HOMB incidence at RT was resolved into two components, 529.4 and 528.9 eV, at Θ ≥ 0.27 ML, which can be assigned to the O atoms occupying the three-fold hollow sites on unreconstructed Cu(111) and four-coordinated sites on the |−13 22| structure, respectively. Annealing the |−13 22| reconstructed surface at 620 K decreased Θ to ∼0.27 ML and induced ( 13 R46.1° × 7R21.8°) , the so-called “29” superstructure." @default.
- W1970339923 created "2016-06-24" @default.
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- W1970339923 date "2008-05-14" @default.
- W1970339923 modified "2023-10-03" @default.
- W1970339923 title "Reconstruction of Cu(111) Induced by a Hyperthermal Oxygen Molecular Beam" @default.
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- W1970339923 doi "https://doi.org/10.1021/jp800713u" @default.
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