Journal article

Band bending in Mg-colored and O₂-activated ultrathin MgO(001) films

  • Jaouen, Thomas Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Hildebrand, Baptiste Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Aebi, Philipp Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Delhaye, G. Département Matériaux et Nanosciences, Institut de Physique de Rennes, Université de Rennes, France
  • Tricot, S. Département Matériaux et Nanosciences, Institut de Physique de Rennes, Université de Rennes, France
  • Lépine, B. Département Matériaux et Nanosciences, Institut de Physique de Rennes, Université de Rennes, France
  • Jézéquel, G. Département Matériaux et Nanosciences, Institut de Physique de Rennes, Université de Rennes, France
  • Schieffer, P. Département Matériaux et Nanosciences, Institut de Physique de Rennes, Université de Rennes, France
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    02.03.2017
Published in:
  • The Journal of Physical Chemistry C. - 2017, vol. 121, no. 8, p. 4363–4367
English Ultrathin MgO films grown on Ag(001) have been investigated using X-ray and ultraviolet photoemission spectroscopies for oxide films successively exposed to Mg and O₂ flux. Studying work functions and layer-resolved Auger shifts allows us to keep track of band profiles from the oxide surface to the interface and reveal the charge- transfer mechanisms underlying the controlled creation of Mg-induced surface color centers and the catalytic enhancement of O₂ activation. Our results demonstrate that one can intimately probe the catalytic properties of metal-supported ultrathin oxide films by studying the electronic band alignment at interfaces.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/305577
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