Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse




Journal Article

Selective Ultrafast Probing of Transient Hot Chemisorbed and Precursor States of CO on Ru(0001)


Wolf,  Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

There are no locators available
Fulltext (public)

(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available

Beye, M., Anniyev, T., Coffee, R., Dell’Angela, M., Föhlisch, A., Gladh, J., et al. (2013). Selective Ultrafast Probing of Transient Hot Chemisorbed and Precursor States of CO on Ru(0001). Physical Review Letters, 110(18): 186101. doi:10.1103/PhysRevLett.110.186101.

Cite as:
We have studied the femtosecond dynamics following optical laser excitation of CO adsorbed on a Ru surface by monitoring changes in the occupied and unoccupied electronic structure using ultrafast soft x-ray absorption and emission. We recently reported [M. Dell’Angela et al. Science 339 1302 (2013)] a phonon-mediated transition into a weakly adsorbed precursor state occurring on a time scale of >2  ps prior to desorption. Here we focus on processes within the first picosecond after laser excitation and show that the metal-adsorbate coordination is initially increased due to hot-electron-driven vibrational excitations. This process is faster than, but occurs in parallel with, the transition into the precursor state. With resonant x-ray emission spectroscopy, we probe each of these states selectively and determine the respective transient populations depending on optical laser fluence. Ab initio molecular dynamics simulations of CO adsorbed on Ru(0001) were performed at 1500 and 3000 K providing insight into the desorption process.