Abstract
We present the study of the synthesis of (001) nickel oxide (NiO) epitaxial nanocrystals grown on (001) strontium titanate (SrTiO3) single crystal substrates. Pulsed laser deposition of the bismuth nickel oxide (BiNiO3, BNO) perovskite precursor followed by post-deposition processing is carried out to form the NiO nanocrystals. A detailed analysis of the dimensions of nanocrystals reveals that the morphology attained differs from the thermodynamically expected equilibrium shape. The deviations from the equilibrium shape are found to follow a systematic trend where the in-plane basal dimensions, that is, the length and width of the nanocrystals grown differ in discretized dimensions. This discretization suggests that for a given interfacial area of nanocrystals there are multiple stable basal rectangular geometries attainable.
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Acknowledgment
The research at UNSW was supported by ARC Discovery and LIEF Grant. We would like to acknowledge Electron Microscopy and Solid State & Elemental Analysis Units (EMU and SSEAU) at UNSW. We are also thankful to Prof. Marty Gregg and Prof. Martin Castell for helpful discussions. Ying-Hao Chu would like to acknowledge the support of the National Science Council, Taiwan (under contract No. NSC-101-2119-M-009-003-MY2) and Ministry of Education (under grant No. MOE-ATU 102W961) and Center for Interdisciplinary Science of National Chiao Tung University.
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Cheung, J., Okatan, M.B., Sullaphen, J. et al. Epitaxial NiO nanocrystals: a dimensional analysis. MRS Communications 3, 107–111 (2013). https://doi.org/10.1557/mrc.2013.16
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DOI: https://doi.org/10.1557/mrc.2013.16