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Microstructure of ZnO shell on Zn nanoparticles

Published online by Cambridge University Press:  01 October 2004

Haiping Sun and
Xiaoqing Pan
Haiping Sun
Affiliation:
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136
Xiaoqing Pan*
Affiliation:
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136
*
a) Address all correspondence to this author. e-mail: panx@umich.edu
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Abstract

When exposed to air at room temperature, Zn nanoparticles oxidize gradually to form crystalline ZnO shells with a thickness of a few nanometers. Electron diffraction and high-resolution lattice imaging revealed that the ZnO layer on the Zn {0001} surface is composed of many epitaxial domains with small rotation angles relative to the lattice of the Zn core. The oxidized Zn particle bends when irradiated by the electron beam in a transmission electron microscope. This is due to the increase of internal stress in the ZnO layer as a result of the realignment of adjacent domains under electron beam irradiation. Corrosion of Zn nanoparticles was observed and the scaling and spalling start to occur on the {1010} prismatic faces.

Keywords

Transmission electron microscopy (TEM)NanoparticleElectron irradiation

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Type
Articles
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Journal of Materials Research , Volume 19 , Issue 10 , October 2004, pp. 3062 - 3067
Copyright
Copyright © Materials Research Society 2004

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References

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