Growth and characterization of barium oxide nanoclusters on YSZ(111)

P. Nachimuthu, Y. J. Kim, S. V N T Kuchibhatla, Z. Q. Yu, W. Jiang, M. H. Engelhard, V. Shutthanandan, János Szanyi, S. Thevuthasan

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Barium oxide (BaO) was grown on a yttria-stabilized zirconia (YSZ) substrate by oxygen plasma-assisted molecular beam epitaxy. In situ reflection high-energy electron diffraction, ex situ X-ray diffraction (XRD), atomic force microscopy, and X-ray photoelectron spectroscopy (XPS) have confirmed that BaO grows as clusters on YSZ(111). During and following growth under ultrahigh vacuum conditions, we found BaO remained in single phase. When exposed to ambient conditions, the clusters transformed to BaCO3 and/or Ba(OH) 2 H2O. However, in a few attempts of BaO growth, XRD results show a fairly single-phase cubic BaO with a lattice constant of 0.5418(1) nm. XPS results show that exposing BaO clusters to ambient conditions resulted in the formation of BaCO3 on the surface and partly Ba(OH) 2 throughout the bulk. On the basis of the observations, it is concluded that the BaO nanoclusters grown on YSZ(111) are highly reactive in ambient conditions.

Original languageEnglish
Pages (from-to)14324-14328
Number of pages5
JournalJournal of Physical Chemistry C
Issue number32
Publication statusPublished - 13 Aug 2009
Externally publishedYes


ASJC Scopus subject areas

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

Cite this

Nachimuthu, P., Kim, Y. J., Kuchibhatla, S. V. N. T., Yu, Z. Q., Jiang, W., Engelhard, M. H., Shutthanandan, V., Szanyi, J., & Thevuthasan, S. (2009). Growth and characterization of barium oxide nanoclusters on YSZ(111). Journal of Physical Chemistry C, 113(32), 14324-14328.