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Interaction of CO molecules with surface state electrons on Ag(111)

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Kulawik,  Maria
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Rust,  Hans-Peter
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Heyde,  Markus
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Nilius,  Niklas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Kulawik, M., Rust, H.-P., Heyde, M., Nilius, N., Mantooth, B. A., Weiss, P. S., et al. (2005). Interaction of CO molecules with surface state electrons on Ag(111). Surface Science, 590(2-3), L253-L258. doi:10.1016/j.susc.2005.05.068.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-075C-E
Abstract
Like other close-packed noble metal surfaces, Ag(1 1 1) exhibits an occupied Shockley-type surface state that is believed to influence the adsorption of atoms and molecules. Using low-temperature scanning tunneling microscopy, we have directly probed this interaction by investigating the local CO distribution dependent on the Ag(1 1 1) surface state standing wave pattern forming in the neighborhood of strong scattering centers such as step edges or hexagonal holes. A quantitative analysis of the STM data reveals that the CO molecules are not arbitrarily distributed upon adsorption at 5 K; they adsorb preferentially near the minima of the standing wave pattern.