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@ARTICLE{LaRue:483446,
      author       = {LaRue, Jerry and Liu, Boyang and Rodrigues, Gabriel L. S.
                      and Liu, Chang and Garrido Torres, Jose Antonio and Schreck,
                      Simon and Diesen, Elias and Weston, Matthew and Ogasawara,
                      Hirohito and Perakis, Fivos and Dell’Angela, Martina and
                      Capotondi, Flavio and Ball, Devon and Carnahan, Conner and
                      Zeri, Gary and Giannessi, Luca and Pedersoli, Emanuele and
                      Naumenko, Denys and Amann, Peter and Nikolov, Ivaylo and
                      Raimondi, Lorenzo and Spezzani, Carlo and Beye, Martin and
                      Voss, Johannes and Wang, Hsin-Yi and Cavalca, Filippo and
                      Gladh, Jörgen and Koroidov, Sergey and Abild-Pedersen,
                      Frank and Kolb, Manuel and Miedema, Piter S. and Costantini,
                      Roberto and Heinz, Tony F. and Luntz, Alan C. and
                      Pettersson, Lars G. M. and Nilsson, Anders},
      title        = {{S}ymmetry-resolved {CO} desorption and oxidation dynamics
                      on {O}/{R}u(0001) probed at the {C} {K}-edge by ultrafast
                      x-ray spectroscopy},
      journal      = {The journal of chemical physics},
      volume       = {157},
      number       = {16},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PUBDB-2022-05333},
      pages        = {164705},
      year         = {2022},
      abstract     = {We report on carbon monoxide desorption and oxidation
                      induced by 400 nm femtosecond laser excitation on the
                      O/Ru(0001) surface probed by time-resolved x-ray absorption
                      spectroscopy (TR-XAS) at the carbon K-edge. The experiments
                      were performed under constant background pressures of CO (6
                      × 10$^{−8}$ Torr) and O$_2$ (3 × 10$^{−8}$ Torr).
                      Under these conditions, we detect two transient CO species
                      with narrow 2$π^*$ peaks, suggesting little 2π*
                      interaction with the surface. Based on polarization
                      measurements, we find that these two species have opposing
                      orientations: (1) CO favoring a more perpendicular
                      orientation and (2) CO favoring a more parallel orientation
                      with respect to the surface. We also directly detect
                      gas-phase CO2 using a mass spectrometer and observe weak
                      signatures of bent adsorbed CO2 at slightly higher x-ray
                      energies than the 2$π^*$ region. These results are compared
                      to previously reported TR-XAS results at the O K-edge, where
                      the CO background pressure was three times lower (2 ×
                      10$^{−8}$ Torr) while maintaining the same O$_2$ pressure.
                      At the lower CO pressure, in the CO 2$π^*$ region, we
                      observed adsorbed CO and a distribution of OC–O bond
                      lengths close to the CO oxidation transition state, with
                      little indication of gas-like CO. The shift toward
                      “gas-like” CO species may be explained by the higher CO
                      exposure, which blocks O adsorption, decreasing O coverage
                      and increasing CO coverage. These effects decrease the CO
                      desorption barrier through dipole–dipole interaction while
                      simultaneously increasing the CO oxidation barrier.},
      cin          = {FS-FLASH},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-FLASH-20140814},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / VH-NG-1105 - Novel soft X-ray
                      spectroscopies for materials science
                      $(2016_IVF-VH-NG-1105)$},
      pid          = {G:(DE-HGF)POF4-632 / $G:(DE-HGF)2016_IVF-VH-NG-1105$},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36319417},
      UT           = {WOS:000876502600007},
      doi          = {10.1063/5.0114399},
      url          = {https://bib-pubdb1.desy.de/record/483446},
}