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- W1592937265 abstract "The interaction of Cu and O adsorbed on a W(110) surface has been studied by Auger, XPS, LEED, TPD, and work function measurements. Regardless of the adsorption sequence there is segregation of Cu and O after heating to 800 K with 0 forming a p(1 × 1) layer. There is no oxygen under the Cu islands, which can reach heights of 50–100 Cu layers. The sum of θo and θcu (the latter referring to the fraction of surface covered by Cu islands after segregation) is ~ 0.77–0.85 and it could be shown that 1.33θo + 1.1θcu = 1 over a wide range of θoand θCu, implying that each component has its own dead zone, proportional to its coverage. Arguments are presented to show that this probably does not correspond to a constant fraction of vacancies in the oxygen and Cu layers, but is driven by O-Cu repulsions. Possible explanations for the proportionality of dead zone areas to O and Cu coverages are given. The energetics of segregation are discussed and it is concluded that O decreases the binding energy of Cu on W(110) by 0.3–0.4 eV, and that this effective repulsion drives the segregation." @default.
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- W1592937265 date "1988-11-01" @default.
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- W1592937265 title "Interaction of oxygen and copper on a W(110) surface" @default.
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- W1592937265 doi "https://doi.org/10.1016/0039-6028(88)90015-5" @default.
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