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Protective layer formation during oxidation of using hyperthermal molecular beam
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View: Figures


Image of FIG. 1.
FIG. 1.

Uptake curves of O on for the 2.3 (●), 0.6 (엯), and 0.3 (⊗) eV HOMB incidences and thermal exposure by backfilling (⊕). The uptake curves on Cu(100) for the HOMB incidence (▵) are shown for comparison. The nozzle temperature was for 2.3 and HOMBs and was for HOMB. The incidence direction is surface normal and the surface temperature is .

Image of FIG. 2.
FIG. 2.

O-coverage dependence of representative Au SR-XPS spectra of for the HOMB incidence in the surface normal at : (a) clean, (b) 0.27 ML, and (c) 0.72 ML. Measurements were performed at 70° from the surface normal. Three components, (thin black line), (thin gray line), and (thick black line), correspond to the surface, bulk, and interface contributions, respectively. The dashed line indicates the background. (d) O-coverage dependence of the intensities of components (●), (엯), and (⊗) of the Au peak.

Image of FIG. 3.
FIG. 3.

(a) X-ray valence-band photoemission spectra for clean, 0.27, and 0.62 ML O covered produced with the HOMB. The detection angle was 70° from the surface normal. Binding energy is scaled relative to the Fermi level. In the bottom, x-ray valence-band spectra for pure Cu(100), Au (Ref. 19 ), and (Ref. 20 ) for comparison. (b) Difference spectra of the clean and O covered in (a). The gray and black lines on the top schematically indicate the calculated local density of states (bonding and antibonding states) projected on the O for Cu and Au surfaces, respectively (Ref. 17 ).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Protective layer formation during oxidation of Cu3Au(100) using hyperthermal O2 molecular beam