Growth of ordered ultrathin tungsten oxide films on pt(111)

Zhenjun Li, Zhenrong Zhang, Yu Kwon Kim, R. Scott Smith, Falko Netzer, Bruce D. Kay, Roger Rousseau, Zdenek Dohnálek

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31 Citations (Scopus)

Abstract

Ordered ultrathin tungsten oxide films were prepared on a Pt(111) substrate at 700 K via direct sublimation of monodispersed cyclic (WO3) 3 trimers. The surface composition, structure, and morphology were determined using a combination of atomically resolved imaging, ensemble-averaged surface-sensitive spectroscopies, and DFT. We find that half of the (WO 3)3 tungsten atoms in the first layer get partially reduced to the (5+) oxidation state. The opening of the (WO3) 3 ring leads to the formation of a tungsten oxide layer with a zigzag chain structure with a c(4×2) periodicity. In the second layer, the (WO3)3 clusters remain intact and form an ordered (3×3) array of molecularly bound (WO3)3. DFT calculations provide a detailed understanding of the structure, oxidation states, and the vibrational frequencies for both the c(4×2) and (3×3) overlayers.

Original languageEnglish
Pages (from-to)5773-5783
Number of pages11
JournalJournal of Physical Chemistry C
Volume115
Issue number13
DOIs
Publication statusPublished - Apr 7 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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    Li, Z., Zhang, Z., Kim, Y. K., Smith, R. S., Netzer, F., Kay, B. D., Rousseau, R., & Dohnálek, Z. (2011). Growth of ordered ultrathin tungsten oxide films on pt(111). Journal of Physical Chemistry C, 115(13), 5773-5783. https://doi.org/10.1021/jp1108976