Journal article

Publication year: 1998

Pages: 774-779

Journal: The Journal of Chemical Physics

Volume number: 108

Issue number: 2

DOI Link: https://doi.org/10.1063/1.475437

Publisher: American Institute of Physics

Abstract: 

The variation of the Cs 6s" role="presentation">6s and the Cs 5p" role="presentation">5p emission in He* and Ne* metastable deexcitation spectroscopy (MDS) as a function of the CO exposure indicates a demetallization of the Ru(0001)–(2×2)-Cs and the Ru(0001)–(√3×√3)R30°-Cs" role="presentation">Ru(0001)–(√3×√3)R30°-Cs surfaces upon CO coadsorption. This observation corroborates a (substrate-mediated) charge transfer from the Cs atom to the 2π* orbital of CO. With the Ru(0001)–(2×2)-Cs system even at CO saturation, MD spectra show emission associated with the Cs 6s" role="presentation">6s state, indicating that the Cs atoms are not completely ionized. Exposing the (√3×√3)R30°-Cs" role="presentation">(√3×√3)R30°-Cs-pre-covered Ru(0001) to CO, surplus Cs of the first layer is displaced into a second layer. In this way, CO molecules are able to be accommodated into the first layer. Desorbing this second layer Cs by heating the sample to 600 K produces a (2×2) structure with one Cs and CO in the unit cell as evidenced by MDS and low energy electron diffraction.

Harvard Citation style: Fichtner-Endruschat, S., De Renzi, V., Morgante, A., Schwegmann, S., Bludau, H., Schuster, R., et al. (1998) Electronic properties of Cs+CO coadsorbed on the Ru(0001) surface, The Journal of Chemical Physics, 108(2), pp. 774-779. https://doi.org/10.1063/1.475437

APA Citation style: Fichtner-Endruschat, S., De Renzi, V., Morgante, A., Schwegmann, S., Bludau, H., Schuster, R., Böttcher, A., & Over, H. (1998). Electronic properties of Cs+CO coadsorbed on the Ru(0001) surface. The Journal of Chemical Physics. 108(2), 774-779. https://doi.org/10.1063/1.475437