Journal article

Publication year: 1995

Pages: 62-68

Journal: Surface Science

Volume number: 331-333

Issue number: Part A

DOI Link: https://doi.org/10.1016/0039-6028(95)00221-9

Publisher: Elsevier

Abstract: 

The adsorption of CO on a precovered Cs(2 × 2)-Ru(0001) structure (θ(Cs) = 0.25) leads to the formation of two distinct (2 × 2)-Cs-CO phases with one and two CO molecules in the unit cell, respectively. The LEED structure analyses showed that Cs remains in the on-top position while CO resides in the hcp position for CO coverage below 0.25 and subsequently fills up the fcc sites. Compared to the clean CO-(√3 × √3)R30° surface, the CO molecule switches its adsite from being on-top to threefold hollow under the influence of coadsorbed Cs. The CO axis is oriented normal to the surface; no tilting has been found. In addition to the short-range interaction, the electrostatic (long-range) attraction between Cs and CO is manifested by the island growth observed for Cs coverages below 0.25 down to 0.08.The adsorption of CO on a precovered Cs(2 × 2)-Ru(0001) structure (θ(Cs) = 0.25) leads to the formation of two distinct (2 × 2)-Cs-CO phases with one and two CO molecules in the unit cell, respectively. The LEED structure analyses showed that Cs remains in the on-top position while CO resides in the hcp position for CO coverage below 0.25 and subsequently fills up the fcc sites. Compared to the clean CO-(√3 × √3)R30° surface, the CO molecule switches its adsite from being on-top to threefold hollow under the influence of coadsorbed Cs. The CO axis is oriented normal to the surface; no tilting has been found. In addition to the short-range interaction, the electrostatic (long-range) attraction between Cs and CO is manifested by the island growth observed for Cs coverages below 0.25 down to 0.08.

Harvard Citation style: Over, H., Bludau, H., Kose, R. and Ertl, G. (1995) Cs and CO coadsorbed on Ru(0001): low-energy electron diffraction analysis, Surface Science, 331-333(Part A), pp. 62-68. https://doi.org/10.1016/0039-6028(95)00221-9

APA Citation style: Over, H., Bludau, H., Kose, R., & Ertl, G. (1995). Cs and CO coadsorbed on Ru(0001): low-energy electron diffraction analysis. Surface Science. 331-333(Part A), 62-68. https://doi.org/10.1016/0039-6028(95)00221-9