Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 12, Pages 6113-6119Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp312517w
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The initial steps of the reaction between ZnO and (001)-oriented Al2O3 single crystals have been investigated with X-ray diffraction, atomic force microscopy, and X-ray absorption spectroscopy at the Zn-K edge starting from 45 nm thick zincite films. The reaction eventually yields the ZnAl2O4 spinel on this interface but via a complex mechanism involving side and intermediate nonequilibrium compounds, the spinel initially forming with a distribution of lattice parameters. Evidence is given of the fact that one of the side compounds has a crystal structure close to that of the Zn3In2O6 compound. The results are discussed in the general context of the same reaction on different single-crystal substrates and different film thicknesses.
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