Journal
INORGANIC CHEMISTRY
Volume 47, Issue 17, Pages 7868-7873Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic8005234
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Funding
- Research Grants Council of Hong Kong [N_HKUST615/06, 603006, CA04/05.SC04]
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The in vitro chemical stability and etching of ZnO nanostructures in simulated physiological solution (SPS) were studied using electron microscopy. Calcium hydrogen phosphate thin layers were observed to be uniformly deposited on the surfaces of ZnO nanomaterials in SPS. Electron diffraction and high-resolution transmission electron microscopy revealed that the calcium hydrogen phosphate layers were amorphous and had excellent interfacial contact with the nanocrystals. ZnO nanostructures fabricated by thermal evaporation were found to survive much longer in SPS than those fabricated using a hydrothermal solution method. The shapes of the voids formed in the ZnO nanostructures by the etching in SPS can be used to deduce the polar directions of ZnO nanostructures.
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