Abstract
Gold nanoclusters dispersed in single crystal TiO2, MgO, and SrTiO3 have been prepared by ion implantation at 300-975 K and subsequent annealing at 1275 K for 10 h. High-resolution transmission electron microscopy and high-angle annular dark field (HAADF) imaging in aberration corrected scanning transmission electron microscope (STEM) have been used to characterize the microstructure of the gold nanoclusters dispersed materials. STEM-HAADF imaging with atomic resolution has directly revealed for all three materials that Au atoms partially occupy cation lattice positions. Cavities up to several tens of nanometers were observed in MgO and SrTiO3. The cavities and gold clusters are spatially associated in MgO and SrTiO3, indicating a strong interaction between the Au cluster and cavities. For MgO and SrTiO3, the faceting planes appear to be the same for both nanometer-sized cavity and the Au cluster, demonstrating that both the surface energy and the interfacial energy between Au cluster and the matrix are lowest on these planes.
| Original language | English |
|---|---|
| Pages (from-to) | 3184-3191 |
| Number of pages | 8 |
| Journal | Journal of the American Ceramic Society |
| Volume | 88 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2005 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Ceramics and Composites
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Atomic resolution imaging of Au nanocluster dispersed in TiO 2, SrTiO 3, and MgO. / Wang, C. M.; Shutthanandan, V.; Zhang, Y.; Thevuthasan, S.; Duscher, G.
In: Journal of the American Ceramic Society, Vol. 88, No. 11, 11.2005, p. 3184-3191.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Atomic resolution imaging of Au nanocluster dispersed in TiO 2, SrTiO 3, and MgO
AU - Wang, C. M.
AU - Shutthanandan, V.
AU - Zhang, Y.
AU - Thevuthasan, S.
AU - Duscher, G.
PY - 2005/11
Y1 - 2005/11
N2 - Gold nanoclusters dispersed in single crystal TiO2, MgO, and SrTiO3 have been prepared by ion implantation at 300-975 K and subsequent annealing at 1275 K for 10 h. High-resolution transmission electron microscopy and high-angle annular dark field (HAADF) imaging in aberration corrected scanning transmission electron microscope (STEM) have been used to characterize the microstructure of the gold nanoclusters dispersed materials. STEM-HAADF imaging with atomic resolution has directly revealed for all three materials that Au atoms partially occupy cation lattice positions. Cavities up to several tens of nanometers were observed in MgO and SrTiO3. The cavities and gold clusters are spatially associated in MgO and SrTiO3, indicating a strong interaction between the Au cluster and cavities. For MgO and SrTiO3, the faceting planes appear to be the same for both nanometer-sized cavity and the Au cluster, demonstrating that both the surface energy and the interfacial energy between Au cluster and the matrix are lowest on these planes.
AB - Gold nanoclusters dispersed in single crystal TiO2, MgO, and SrTiO3 have been prepared by ion implantation at 300-975 K and subsequent annealing at 1275 K for 10 h. High-resolution transmission electron microscopy and high-angle annular dark field (HAADF) imaging in aberration corrected scanning transmission electron microscope (STEM) have been used to characterize the microstructure of the gold nanoclusters dispersed materials. STEM-HAADF imaging with atomic resolution has directly revealed for all three materials that Au atoms partially occupy cation lattice positions. Cavities up to several tens of nanometers were observed in MgO and SrTiO3. The cavities and gold clusters are spatially associated in MgO and SrTiO3, indicating a strong interaction between the Au cluster and cavities. For MgO and SrTiO3, the faceting planes appear to be the same for both nanometer-sized cavity and the Au cluster, demonstrating that both the surface energy and the interfacial energy between Au cluster and the matrix are lowest on these planes.
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U2 - 10.1111/j.1551-2916.2005.00579.x
DO - 10.1111/j.1551-2916.2005.00579.x
M3 - Article
VL - 88
SP - 3184
EP - 3191
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 11
ER -