1. Ultrafast charge transfer at monolayer graphene surfaces with varied substrate coupling.

    ACS Nano 7(5):4359 (2013) PMID 23570394

    The charge transfer rates of a localized excited electron to graphene monolayers with variable substrate coupling have been investigated by the core hole clock method with adsorbed argon. Expressed as charge transfer times, we find strong variations between ~3 fs (on graphene "valleys" on Ru(000...
  2. Ultrafast charge transfer at monolayer graphene surfaces with varied substrate coupling.

    ACS Nano 7(5):4359 (2013) PMID 23570394

    The charge transfer rates of a localized excited electron to graphene monolayers with variable substrate coupling have been investigated by the core hole clock method with adsorbed argon. Expressed as charge transfer times, we find strong variations between ~3 fs (on graphene "valleys" on Ru(000...
  3. Electronically induced surface reactions: evolution, concepts, and perspectives.

    Journal of Chemical Physics 137(9):091702 (2012) PMID 22957544

    This is a personal account of the development of the title subject which is the broader field encompassing surface photochemistry. It describes the early times when the main interest centered on desorption induced by slow electrons, follows its evolution in experiment (use of synchrotron radiati...
  4. Electronically induced surface reactions: evolution, concepts, and perspectives.

    Journal of Chemical Physics 137(9):091702 (2012) PMID 22957544

    This is a personal account of the development of the title subject which is the broader field encompassing surface photochemistry. It describes the early times when the main interest centered on desorption induced by slow electrons, follows its evolution in experiment (use of synchrotron radiati...
  5. Comparative study of thermal and photo-induced reactions of NO on particulate and flat silver surfaces

    Surface Science 606(15-16):1142 (2012)

    Adsorption states, thermal reactions, and photoreactions at photon energies 2.3–4.7eV of NO dimers and monomers have been compared between 8-nm silver nanoparticles (Ag NPs) formed on an Al2O3/NiAl(110) substrate and flat Ag(111) surfaces, by thermal desorption (TPD) and by photodesorp...
  6. Comparative study of thermal and photo-induced reactions of NO on particulate and flat silver surfaces

    Surface Science 606(15-16):1142 (2012)

    Adsorption states, thermal reactions, and photoreactions at photon energies 2.3–4.7eV of NO dimers and monomers have been compared between 8-nm silver nanoparticles (Ag NPs) formed on an Al2O3/NiAl(110) substrate and flat Ag(111) surfaces, by thermal desorption (TPD) and by photodesorp...
  7. Enhanced photoinduced desorption from metal nanoparticles by photoexcitation of confined hot electrons using femtosecond laser pulses.

    Physical Review Letters 107(4):047401 (2011) PMID 21867042

    Strong fluence dependence of photodesorption cross sections is observed in femtosecond laser photodesorption of NO from (NO)2 on silver nanoparticles, in contrast to femtosecond photodesorption on bulk metals. The time scale of excitation buildup is found to be equal or less than the pulse durat...
  8. Enhanced photoinduced desorption from metal nanoparticles by photoexcitation of confined hot electrons using femtosecond laser pulses.

    Physical Review Letters 107(4):047401 (2011) PMID 21867042

    Strong fluence dependence of photodesorption cross sections is observed in femtosecond laser photodesorption of NO from (NO)2 on silver nanoparticles, in contrast to femtosecond photodesorption on bulk metals. The time scale of excitation buildup is found to be equal or less than the pulse durat...
  9. State-resolved investigation of the photodesorption dynamics of NO from (NO)2 on Ag nanoparticles of various sizes in comparison with Ag(111).

    Journal of Chemical Physics 134(16):164702 (2011) PMID 21528976

    The translational and internal state energy distributions of NO desorbed by laser light (2.3, 3.5, and 4.7 eV) from adsorbed (NO)(2) on Ag nanoparticles (NPs) (mean diameters, D = 4, 8, and 11 nm) have been investigated by the (1 + 1) resonance enhanced multiphoton ionization technique. For comp...
  10. State-resolved investigation of the photodesorption dynamics of NO from (NO)2 on Ag nanoparticles of various sizes in comparison with Ag(111).

    Journal of Chemical Physics 134(16):164702 (2011) PMID 21528976

    The translational and internal state energy distributions of NO desorbed by laser light (2.3, 3.5, and 4.7 eV) from adsorbed (NO)(2) on Ag nanoparticles (NPs) (mean diameters, D = 4, 8, and 11 nm) have been investigated by the (1 + 1) resonance enhanced multiphoton ionization technique. For comp...
  11. UV photo-dissociation and photodesorption of N2O on Ag(111).

    Journal of Physics, Condensed Matter 22(8):084012 (2010) PMID 21389388

    Nanosecond laser induced photoreactions of N2O adsorbed on Ag(111) have been studied by temperature programmed desorption (TPD) and mass-selected, angle-dependent time-of-flight (MS-TOF) measurements of neutral desorbing particles. N2O molecules in the first monolayer are thermally inert but pho...
  12. UV photo-dissociation and photodesorption of N2O on Ag(111).

    Journal of Physics, Condensed Matter 22(8):084012 (2010) PMID 21389388

    Nanosecond laser induced photoreactions of N2O adsorbed on Ag(111) have been studied by temperature programmed desorption (TPD) and mass-selected, angle-dependent time-of-flight (MS-TOF) measurements of neutral desorbing particles. N2O molecules in the first monolayer are thermally inert but pho...
  13. Photoinduced abstraction reactions within NO dimers on Ag(111).

    Journal of the American Chemical Society 131(5):1660 (2009) PMID 19146370

    Nanosecond laser-induced photoreactions of (NO)(2) adsorbed on Ag(111) at 75 K are investigated by mass-selected photoinduced desorption (PID) and time-of-flight (TOF) measurements. It has been found that N(2) as well as N(2)O is formed by a photoinduced abstraction reaction within a single (NO)...
  14. Photoinduced abstraction reactions within NO dimers on Ag(111).

    Journal of the American Chemical Society 131(5):1660 (2009) PMID 19146370

    Nanosecond laser-induced photoreactions of (NO)(2) adsorbed on Ag(111) at 75 K are investigated by mass-selected photoinduced desorption (PID) and time-of-flight (TOF) measurements. It has been found that N(2) as well as N(2)O is formed by a photoinduced abstraction reaction within a single (NO)...
  15. The geometries of coadsorbate layers of O and H on Ru(0 0 1): How well can quantitative LEED see hydrogen atoms?

    Surface Science 603(10):1397 (2009)

    Using a CCD LEED system for the collection of IV data with low beam damage, and full dynamical as well as tensor LEED calculations, we have determined the geometries of the (2 × 2)-(O + 3H) and the (2 × 2)-(O + H) coadsorbate structures on Ru(...
  16. The geometries of coadsorbate layers of O and H on Ru(0 0 1): How well can quantitative LEED see hydrogen atoms?

    Surface Science 603(10):1397 (2009)

    Using a CCD LEED system for the collection of IV data with low beam damage, and full dynamical as well as tensor LEED calculations, we have determined the geometries of the (2 × 2)-(O + 3H) and the (2 × 2)-(O + H) coadsorbate structures on Ru(...
  17. Size effects in thermal and photochemistry of (NO)2 on Ag nanoparticles.

    Physical Review Letters 101(14):146103 (2008) PMID 18851546

    NO dimers adsorbed on alumina supported silver nanoparticles (Ag NPs, radii R approximately 1-6 nm) show decreasing desorption temperatures and complex behavior of photoinduced desorption with decreasing NP size. In particular, for resonant excitation of the (1,0) Mie plasmon at 3.5 eV the photo...
  18. Size effects in thermal and photochemistry of (NO)2 on Ag nanoparticles.

    Physical Review Letters 101(14):146103 (2008) PMID 18851546

    NO dimers adsorbed on alumina supported silver nanoparticles (Ag NPs, radii R approximately 1-6 nm) show decreasing desorption temperatures and complex behavior of photoinduced desorption with decreasing NP size. In particular, for resonant excitation of the (1,0) Mie plasmon at 3.5 eV the photo...
  19. Ultrafast charge transfer at surfaces accessed by core electron spectroscopies.

    Chemical Society Reviews 37(10):2212 (2008) PMID 18818824

    Charge transfer at surfaces, which is very important for surface photochemistry and other processes, can be extremely fast. This tutorial review shows how high resolution correlated excitation/decay spectroscopies of core excitations can be used to obtain charge transfer times at surfaces around...
  20. Ultrafast charge transfer at surfaces accessed by core electron spectroscopies.

    Chemical Society Reviews 37(10):2212 (2008) PMID 18818824

    Charge transfer at surfaces, which is very important for surface photochemistry and other processes, can be extremely fast. This tutorial review shows how high resolution correlated excitation/decay spectroscopies of core excitations can be used to obtain charge transfer times at surfaces around...