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首页> 外文期刊>Journal of Materials Research >The growth of hematite nanobelts and nanowires—tune the shape via oxygen gas pressure
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The growth of hematite nanobelts and nanowires—tune the shape via oxygen gas pressure

机译：赤铁矿纳米带和纳米线的生长-通过氧气压力调整形状

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摘要

Using the thermal oxidation of iron, we show that the growth morphologies of one-dimensional nanostructures of hematite (a-Fe_2O_3) can be tuned by varying the oxygen gas pressure. It is found that the oxidation at the oxygen gas pressures of ~ 0.1 Torr is dominated by the growth of hematite nanobelts, whereas oxidation at pressure near 200 Torr is dominated by the growth of hematite nanowires. Detailed transmission electron microscopy study shows that both the nanobelts and nanowires grow along the [1120] direction with a bicrystal structure. It is shown that nanowires are rooted on Fe_2O_3 grains, whereas nanobelts are originated from the boundaries of Fe_2O_3 grains. Our results show that oxygen gas pressure can be used to manipulate the Fe_2O_3/Fe_3O_4 interfacial reaction, thereby tailoring the oxide growth morphologies via the stress-driven diffusion.
机译：使用铁的热氧化，我们表明赤铁矿（a-Fe_2O_3）的一维纳米结构的生长形态可以通过改变氧气压力来调节。发现在氧气压力约0.1托时的氧化作用主要由赤铁矿纳米带的生长决定，而在压力接近200托时的氧化则主要由赤铁矿纳米线的生长决定。详细的透射电子显微镜研究表明，纳米带和纳米线均沿[1120]方向以双晶结构生长。结果表明，纳米线起源于Fe_2O_3晶粒，而纳米带则起源于Fe_2O_3晶粒的边界。我们的结果表明，氧气压力可用于控制Fe_2O_3 / Fe_3O_4界面反应，从而通过应力驱动的扩散来调整氧化物的生长形态。

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  • 来源
    《Journal of Materials Research》 |2012年第7期|p.1014-1021|共8页
  • 作者

    Lu Yuan; Qike Jiang; Jianbo Wang; Guangwen Zhou;

  • 作者单位

    Department of Mechanical Engineering and Multidisciplinary Program in Materials Science and Engineering,State University of New York, Binghamton, New York 13902;

    School of Physics, Center for Electron Microscopy and Ministry of Education Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan 430072, China;

    School of Physics, Center for Electron Microscopy and Ministry of Education Key Laboratory of Artificial Micro- and Nano-Structures, Wuhan University, Wuhan 430072, China;

    Department of Mechanical Engineering and Multidisciplinary Program in Materials Science and Engineering, State University of New York, Binghamton, New York 13902;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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