Simple and Rapid Synthesis of α-Fe2O3 Nanowires Under Ambient Conditions
Simple and Rapid Synthesis of α-Fe2O3 Nanowires Under Ambient Conditions
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DOI：
10.1007/s12274-009-9036-5
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发表时间：
2009-05-01
期刊：
影响因子：
9.9
通讯作者：
Kauppinen, Esko I.
中科院分区：
文献类型：
--
作者：
Nasibulin, Albert G.;Rackauskas, Simas;Kauppinen, Esko I.
我们提出了一种简单的方法，有效和快速的合成一维赤铁矿（α-Fe 2 O3）纳米结构的基础上电阻加热的铁丝在环境条件下。典型地，1-5 μ m长的α-Fe 2 O3纳米线在约700 ℃的温度下以秒的时间尺度合成。通过扫描和透射电子显微镜、能量色散X射线光谱、X射线光电子能谱和拉曼技术研究了纳米线的形态、结构和形成机制。提出了一种基于铁离子通过晶界扩散到表面和通过层错缺陷和由于表面扩散到生长线尖端的纳米线生长机制。
We propose a simple method for the efficient and rapid synthesis of one-dimensional hematite (alpha-Fe2O3) nanostructures based on electrical resistive heating of iron wire under ambient conditions. Typically, 1-5 mu m long alpha-Fe2O3 nanowires were synthesized on a time scale of seconds at temperatures of around 700 degrees C. The morphology, structure, and mechanism of formation of the nanowires were studied by scanning and transmission electron microscopies, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Raman techniques. A nanowire growth mechanism based on diffusion of iron ions to the surface through grain boundaries and to the growing wire tip through stacking fault defects and due to surface diffusion is proposed.