Effect of hydrogen plasma irradiation of catalyst films on growth of carbon nanotubes filled with iron nanowires
Effect of hydrogen plasma irradiation of catalyst films on growth of carbon nanotubes filled with iron nanowires
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DOI：
10.1116/1.4827822
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Hideki Sato;Nobuo Kubonaka;A. Nagata;Y. Fujiwara
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文献类型：
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作者：
Hideki Sato;Nobuo Kubonaka;A. Nagata;Y. Fujiwara
由于磁性纳米线的高长径比，填充了铁的碳纳米管呈现出形状各向异性，在磁记录介质、扫描力显微镜探头和癌症医疗等方面具有广阔的应用前景。对于这些应用，希望能够适当地控制碳纳米管的磁性。在这项研究中，作者研究了用热化学气相沉积法制备的填充Fe的碳纳米管的磁性，以调节其矫顽力。在这里，作者实现了氢等离子体辐照之前作为催化层沉积在衬底上的催化膜。这种处理激活了催化膜，从而促进了填充Fe的碳纳米管的生长。结果表明，与未辐照的碳纳米管相比，氢等离子体辐照促进了碳纳米管的生长，增加了碳纳米管的长度和直径。另一方面，铁粉的矫直力……
Carbon nanotubes filled with iron (Fe-filled CNTs) show shape anisotropy on account of the high aspect ratio of magnetic nanowires, and are promising candidates for various applications, such as magnetic recording media, probes for scanning force microscopy, and medical treatment for cancer. The ability to appropriately control the magnetic properties of CNTs for those applications is desirable. In this study, the authors investigated magnetic properties of Fe-filled CNTs synthesized by thermal chemical vapor deposition for the purpose of tuning their coercivity. Here, the authors implemented hydrogen plasma irradiation of catalyst film that was previously deposited on a substrate as a catalyst layer. This treatment activates the catalyst film and thus enhances the growth of the Fe-filled CNTs. It was confirmed that the H2 plasma irradiation enhances the growth of the CNTs in terms of increasing their length and diameter compared to CNTs without irradiation. On the other hand, the coercivity of Fe-filled ...