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- W1991409568 abstract "Combined LEED and EELS measurements have been performed to study the ordering behaviour of C2H2 and C2H4 on Ni(111). Each system forms three different phases of long-range order [(2 × 2), (3 × 3)R30°, (23 × 3)R30° for C2H2; c(4 sx 2), (2 × 2), (31122) for C2H4] depending on temperature and exposure. EELS spectra indicate that each series of structure phases consists of the same surface species. LEED intensity spectra taken from both the (2 × 2) phases show strong similarities which leads to the qualitative conclusion that C2H2 and C2H4 both prefer the same adsorption site. A kinematical evaluation of superstructure spots of the non-primitive phases (23 × 3)R30° and (31122) together with an antiphase-splitting observation leads us to suggest bridge positions as adsorption sites for the carbon atoms of the molecules." @default.
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- W1991409568 date "1986-12-01" @default.
- W1991409568 modified "2023-09-27" @default.
- W1991409568 title "Ordered phases of C2H2 and C2H2 on the Ni(111) face" @default.
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- W1991409568 doi "https://doi.org/10.1016/0039-6028(86)90345-6" @default.
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