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Open AccessFeature PaperArticle

Single-Crystalline Metal Oxide Nanostructures Synthesized by Plasma-Enhanced Thermal Oxidation

1
School of Electronic Science and Engineering, College of Energy, Xiamen University, Xiamen 361005, China
2
Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
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Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
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Jožef Stefan Postgraduate School, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
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National Aerospace University, Kharkov 61070, Ukraine
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School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD 4000, Australia
7
Joint CSIRO-QUT Sustainable Processes and Devices Laboratory, Lindfield NSW 2070, Australia
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(10), 1405; https://doi.org/10.3390/nano9101405
Received: 4 September 2019 / Revised: 23 September 2019 / Accepted: 29 September 2019 / Published: 2 October 2019
To unravel the influence of the temperature and plasma species on the growth of single-crystalline metal oxide nanostructures, zinc, iron, and copper foils were used as substrates for the study of nanostructure synthesis in the glow discharge of the mixture of oxygen and argon gases by a custom-made plasma-enhanced horizontal tube furnace deposition system. The morphology and microstructure of the resulting metal oxide nanomaterials were controlled by changing the reaction temperature from 300 to 600 °C. Experimentally, we confirmed that single-crystalline zinc oxide, copper oxide, and iron oxide nanostructures with tunable morphologies (including nanowires, nanobelts, etc.) can be successfully synthesized via such procedure. A plausible growth mechanism for the synthesis of metal oxide nanostructures under the plasma-based process is proposed and supported by the nanostructure growth modelling. The results of this work are generic, confirmed on three different types of materials, and can be applied for the synthesis of a broader range of metal oxide nanostructures.
Keywords: metal oxide nanostructures; plasma-enhanced thermal oxidation; growth mechanism; material characterization; nanostructure growth modelling metal oxide nanostructures; plasma-enhanced thermal oxidation; growth mechanism; material characterization; nanostructure growth modelling
MDPI and ACS Style

Guo, B.; Košiček, M.; Fu, J.; Qu, Y.; Lin, G.; Baranov, O.; Zavašnik, J.; Cheng, Q.; Ostrikov, K.(.; Cvelbar, U. Single-Crystalline Metal Oxide Nanostructures Synthesized by Plasma-Enhanced Thermal Oxidation. Nanomaterials 2019, 9, 1405.

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