Abstract
Infrared reflection absorption spectra in the CH 2 out-of-plane wagging (ω(CH 2)) vibration region were measured for ethylene (C 2H 4) adsorbed on Ag(110) as well as on the oxygen-induced p( n×1) reconstructed surfaces of Ag(110) ( n=2, 3, 4 and 6) at 80 K. C 2H 4 on Ag(110) gives a main peak at 955 cm −1, while on p(2×1)O–Ag(110) it exhibits a broad features of at least four components (997, 984, 970 and 954 cm −1) at saturation coverage. C 2H 4 on p( n×1)O–Ag(110) ( n=6, 4, 3) gives rise to a 972–976 cm −1 band at low exposures, shifting to 966–970 cm −1 at saturation coverage. The spectral changes are interpreted by assuming a pair of adsorption sites on both sides of the added Ag–O rows of the reconstructed surfaces.
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