Vibrational analysis of Cs + CO coadsorbed on Ru(0001)

Citations of this article
Mendeley users who have this article in their library.
Get full text


On the Ru(0001) surface Cs and CO form a very well ordered (Cs + CO)-(2 × 2) compound layer whose structure was determined recently (Cs on-top, CO in 3-fold sites). Here we present a vibrational analysis of the same system using high-resolution electron energy loss spectroscopy (HREELS), thermal desorption spectroscopy (TDS), and low-energy electron diffraction (LEED). Two C-O stretch frequencies are observed depending on whether there are one or two CO molecules in the 2 × 2 cell. Two CO-Ru stretch modes are observed for the first time and are assigned to adsorption in the hcp and fee hollow sites within the 2 × 2 cell. They are very weak in intensity which is attributed to the threefold-hollow site and some screening in the 2D compound. With CO adsorption a change of the electronic structure is observed: the adlayer loses metallicity and the Cs-Ru stretch becomes visible. Strong changes of the Cs-Ru stretch energies are observed with CO coverage.




He, P., Xu, Y., & Jacobi, K. (1996). Vibrational analysis of Cs + CO coadsorbed on Ru(0001). Surface Science, 352354, 1–4.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free