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Epitaxial NiO nanocrystals: a dimensional analysis

Published online by Cambridge University Press:  16 April 2013

Jeffrey Cheung ,
Mahmut Baris Okatan ,
Jivika Sullaphen ,
Xuan Cheng ,
Valanoor Nagarajan ,
Yong-Lun Chen  and
Ying-Hao Chu
Jeffrey Cheung
Affiliation:
School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Mahmut Baris Okatan
Affiliation:
School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Jivika Sullaphen
Affiliation:
School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Xuan Cheng
Affiliation:
School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Valanoor Nagarajan*
Affiliation:
School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
Yong-Lun Chen
Affiliation:
Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
Ying-Hao Chu
Affiliation:
Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
*
Address all correspondence to V. Nagarajan at nagarajan@unsw.edu.au
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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.

Type
Research Letters
Information
MRS Communications , Volume 3 , Issue 2 , June 2013 , pp. 107 - 111
Copyright
Copyright © Materials Research Society 2013 

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