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Structure and Epitaxy of Silver/Gold Microclusters on MgO

Published online by Cambridge University Press:  28 February 2011

L. D. Marks ,
M. C. Hong ,
H. Zhang  and
B. K. Teo
L. D. Marks
Affiliation:
Department of Materials Science, Northwestern University, Evanston, IL 60208
M. C. Hong
Affiliation:
University of Illinois at Chicago, Department of Chemistry, Chicago, IL 60680.
H. Zhang
Affiliation:
University of Illinois at Chicago, Department of Chemistry, Chicago, IL 60680.
B. K. Teo
Affiliation:
University of Illinois at Chicago, Department of Chemistry, Chicago, IL 60680.
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Abstract

We report observations by high resolution electron microscopy of model catalysts produced by impregnating MgO smoke particles with inorganic clusters. With the use of very low beam currents the substrates are of sufficiently low noise that we have been able to image cleanly both single atoms and very small clusters of size l-2nm in sufficient detail to determine their atomic structure. Two types of metal structures are observed: single atoms decorating atomic steps and in a few cases two-dimensional surface rafts, and a population of mainly single crystal with a few multiply twinned particles. The single crystal particles are pseudomorphically epitaxed on the MgO substrates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 213
Copyright
Copyright © Materials Research Society 1988

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References

1. Marks, L. D., Ultramicroscopy, 18, 445 (1985).CrossRefGoogle Scholar
2. Heinemann, K. and Soria, F., Ultramicroscopy, 20, 1 (1986).CrossRefGoogle Scholar
3. Treacy, M. J., private communicationGoogle Scholar
4. Iijima, S. and Ichihashi, T., Japanese J. Appl. Phys., 24, L125 (1985); Phys. Rev. Letts, 56, 616 (1986).CrossRefGoogle Scholar
5. Iijima, S., J. Electron Microscopy, 34, 249 (1985).Google Scholar
6. Bovin, J. O., Wallenberg, R. and Smith, D. J., Nature, 317, 47 (1985).CrossRefGoogle Scholar
7. Dundurs, J., Ajayan, P. M. and Marks, L. D., Phil Mag in pressGoogle Scholar
8. Ajayan, P. M. and Marks, L. D., these proceedingsGoogle Scholar
9. Teo, B. K. and Keating, K., J. Am. Chem. Soc., 106, 2224 (1984).CrossRefGoogle Scholar
10. Teo, B. K., Hong, M. C., Ahang, H. and Huang, D. B., Angew. Chem. Int. Ed. Engl., 26, 897 (1987); J. C. S. Chem. Comm., submitted.CrossRefGoogle Scholar