Abstract
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 language | English |
|---|---|
| Pages (from-to) | 14324-14328 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry C |
| Volume | 113 |
| Issue number | 32 |
| DOIs | |
| Publication status | Published - 13 Aug 2009 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films
- Energy(all)
Cite this
Growth and characterization of barium oxide nanoclusters on YSZ(111). / Nachimuthu, P.; Kim, Y. J.; Kuchibhatla, S. V N T; Yu, Z. Q.; Jiang, W.; Engelhard, M. H.; Shutthanandan, V.; Szanyi, János; Thevuthasan, S.
In: Journal of Physical Chemistry C, Vol. 113, No. 32, 13.08.2009, p. 14324-14328.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Growth and characterization of barium oxide nanoclusters on YSZ(111)
AU - Nachimuthu, P.
AU - Kim, Y. J.
AU - Kuchibhatla, S. V N T
AU - Yu, Z. Q.
AU - Jiang, W.
AU - Engelhard, M. H.
AU - Shutthanandan, V.
AU - Szanyi, János
AU - Thevuthasan, S.
PY - 2009/8/13
Y1 - 2009/8/13
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=68749098264&partnerID=8YFLogxK
U2 - 10.1021/jp9020068
DO - 10.1021/jp9020068
M3 - Article
AN - SCOPUS:68749098264
VL - 113
SP - 14324
EP - 14328
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 32
ER -