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Open AccessArticle

Large Area Synthesis of Vertical Aligned Metal Oxide Nanosheets by Thermal Oxidation of Stainless Steel Mesh and Foil

1
School of Resources Environmental & Chemical Engineering, Nanchang University, Nanchang 330031, China
2
Department of Physics, North Carolina Central University, Durham, NC 27707, USA
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Department of Chemistry and Biochemistry, North Carolina Central University, Durham, NC 27707, USA
4
Institute for Advanced Study, Nanchang University, Nanchang 330031, China
5
Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Ministry of Education, Nanchang 330031, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(6), 884; https://doi.org/10.3390/ma11060884
Received: 11 May 2018 / Revised: 21 May 2018 / Accepted: 23 May 2018 / Published: 25 May 2018
(This article belongs to the Section Advanced Nanomaterials and Nanotechnology)
We report here the synthesis of metal oxide nanosheets (MONs) directly grown on stainless steel substrates by thermal oxidation in the presence of trace amounts of water. The morphology and microstructure of MONs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and atomic force microscopy (AFM). The composition of MONs was determined by the energy dispersive system and X-ray diffraction patterns. The results showed that the as-synthesized MONs were ultrathin, vertically aligned, and mostly transparent. They were polycrystalline and were composed primarily of Cr2O3 and (Fe, Mn)3O4. The optimal condition to synthesize the MONs with an optimal ultra-high surface atom ratio were determined by varying the temperature and time required for the growth of the MONs. It was found that the lateral size of MONs gradually increases as the temperature rises from 1000 to 1100 °C. An optimal temperature of 1100 °C is obtained in terms of the growth density, size and transparency degree growth morphology, and quality. The structure of MONs changes from two-dimensional to three-dimensional networks when the synthesis time is prolonged to more than 1 h. View Full-Text
Keywords: metal oxide nanosheet; vertically aligned; three-dimensional networks metal oxide nanosheet; vertically aligned; three-dimensional networks
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MDPI and ACS Style

Wu, F.; Wang, C.; Wu, M.H.; Vinodgopal, K.; Dai, G.-P. Large Area Synthesis of Vertical Aligned Metal Oxide Nanosheets by Thermal Oxidation of Stainless Steel Mesh and Foil. Materials 2018, 11, 884.

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