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首页> 外文期刊>Materials Chemistry and Physics. >Solution reduction synthesis and characterizations of HCP Co nanoplatelets
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Solution reduction synthesis and characterizations of HCP Co nanoplatelets

机译：HCP Co纳米片的溶液还原合成及表征

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摘要

Cobalt nanoplatelets with hexagonal close-packed crystal structure have been synthesized through the reduction of cobalt chloride by NaH_2 PO_2 in a mild aqueous solution without surfactant used. X-ray diffraction analysis reveals that the as-prepared samples are pure HCP cobalt. Transmission electron microscope observations indicate that the synthesized particles are plate-like in form and have the diameter between 150 and 220 nm and thickness of about 10 nm. A selected-area electron diffraction analysis shows that the perpendicular direction of the Co nanoplatelets is a [001] crystallographic direction. X-ray photoelectron spectroscopy analysis implies that the surface of the Co nanoparticles was oxidized in air and formed CoO layer. Magnetic measurements reveal that the Co nanoplatelet powder samples are ferromagnetic. The saturation magnetization of the Co nanoplatelet powder samples is lower than the corresponding bulk value. The coercivity is as high as 263 Oe.
机译：通过在不使用表面活性剂的温和水溶液中通过NaH_2PO_2还原氯化钴，合成了具有六方密堆积晶体结构的钴纳米片。 X射线衍射分析表明，所制备的样品是纯HCP钴。透射电子显微镜观察表明，合成的颗粒呈板状，直径在150至220nm之间，厚度约10nm。选区电子衍射分析表明，Co纳米片的垂直方向是[001]晶体学方向。 X射线光电子能谱分析表明Co纳米颗粒的表面在空气中被氧化并形成CoO层。磁性测量表明，Co纳米血小板粉末样品具有铁磁性。 Co纳米片粉末样品的饱和磁化强度低于相应的体积值。矫顽力高达263 Oe。

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  • 来源
    《Materials Chemistry and Physics.》 |2009年第3期|514-518|共5页
  • 作者

    Lei Zhang; Huazhi Wang; Jiangong Li;

  • 作者单位

    MOE Key Laboratory for Magnetism and Magnetic Materials and Institute of Materials Science and Engineering, Lanzhou University, Lanzhou 730000, China;

    MOE Key Laboratory for Magnetism and Magnetic Materials and Institute of Materials Science and Engineering, Lanzhou University, Lanzhou 730000, China;

    MOE Key Laboratory for Magnetism and Magnetic Materials and Institute of Materials Science and Engineering, Lanzhou University, Lanzhou 730000, China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanostructures; chemical synthesis; crystal structure; magnetic properties;

    机译：纳米结构化学合成晶体结构磁性;

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