| AVS 58th Annual International Symposium and Exhibition | |
| Surface Science Division | Monday Sessions |
| Session SS2-MoM |
| Session: | Surface Chemical Dynamics |
| Presenter: | Hirohito Ogasawara, SLAC Nat. Accel. Lab |
| Authors: | M. Beye, Helmholtz Zerntrum Berlin, Germany R. Coffee, SLAC Nat. Accel. Lab M. Dell'Angela, Univ. of Hamburg, Germany A. Foehlisch, Helmholtz Zerntrum Berlin, Germany J. Gladh, Stockholm Univ., Sweden T. Katayama, SLAC Nat. Accel. Lab S. Kaya, SLAC Nat. Accel. Lab O. Krupin, SLAC Nat. Accel. Lab A. Nilsson, SLAC Nat. Accel. Lab D. Nordlund, SLAC Nat. Accel. Lab H. Oberg, Stockholm Univ., Sweden H. Ogasawara, SLAC Nat. Accel. Lab H. Ostrom, Stockholm Univ., Sweden L.G.M. Pettersson, Stockholm Univ., Sweden W.F. Schlotter, SLAC Nat. Accel. Lab J.A. Sellberg, SLAC Nat. Accel. Lab F. Sorgenfrei, Univ. of Hamburg, Germany J.J. Turner, SLAC Nat. Accel. Lab M. Wolf, Fritz-Haber-Inst., Germany W. Wurth, Univ. of Hamburg, Germany |
| Correspondent: | Click to Email |
New possibilities for the study of chemical reactions on surfaces using X-ray free-electron lasers (Linac Coherent Light Source, or LCLS, at SLAC National Accelerator Laboratory) will be presented. We induced the hot electron mediated excitation of CO on Ru(0001) with synchronized excitation by a femtosecond optical laser pulse. We have followed the ultrafast evolution of the bond distortions, weakening and breaking, using x-ray emission spectroscopy resonantly tuned to the oxygen core level with ultrashort x-ray pulses delivered from LCLS. We can directly study the time evolution of the molecular orbitals in an atom-specific way on a subpicosecond timescale. Different adsorption configurations explored have been characterized by comparing the measured time dependent energy shifts of the molecular orbitals in the valence band with theoretical results.
This research was carried out on the SXR Instrument on the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory. The SXR Instrument is funded by a consortium whose membership include the LCLS, Stanford University through the Stanford Institute for Materials Energy Sciences (SIMES), Lawrence Berkeley National Laboratory (LBNL), University of Hamburg through the BMBF priority program FSP 301, and the Center for Free Electron Laser Science (CFEL). The LCLS is funded by the U.S. Department of Energy's Office of Basic Energy Sciences.