Synthesis and Properties of Homogeneous SWNTs by Using Magnetic Field Controlled Arc-plasma

在这项工作中，我们开展了生产和提纯优质单壁碳纳米管的研究。本工作的主要目的是利用磁场控制弧光等离子体，合成形貌可控的纳米管。此外，利用我们已经开发的水热处理方法对合成的单壁碳纳米管进行了提纯。本研究的最终目的是建立一种高纯度(99%以上)单壁单壁碳纳米管的大批量生产的综合方法。2000年，在1999年设计和制造的弧光放电室中优化了单壁碳纳米管的合成条件，并用透射电子显微镜、拉曼光谱和X射线衍射仪等手段对纯化的单壁碳纳米管的质量和条件进行了评价。此外，还设计和制造了一种改进的电弧室，使之能够在强磁场(最大。5特斯拉)。结果，获得了与管子生长机理有关的信息。并首次在5特斯拉强的磁场中合成了单壁碳纳米管。基于上述研究成果，我们成功地合成和提纯了单壁碳纳米管，并为其他组提供了高质量的单壁碳纳米管。因此，我们在这一专题研究项目的属性评估和面向应用的研究领域做出了贡献。

In this work, we carried out to research to produce and purify good quality single wall carbon nanatubes. The main objective of this work was to control the arc plasma using the magnetic field and synthesis nanotubes with controlled morphology. Furthermore, the SWNTs synthesized were purified using hydrothermal treatment, which was already developed by us. Final aim of this research was to develop a comprehensive methodology for the production of highly pure (above 99%) single wall SWNTs in large quantities.In the year 2000, SWNTs synthesis conditions were optimized in the arc-discharge chamber designed and manufactured in the year 1999, and evaluated the quality and condition of purified SWNTs using transmission electron microscope, Raman spectroscopy and X-ray diffractometer, etc.. Furthermore, a modified version of the arc-discharge chamber was designed and manufactured to enable experiments under strong magnetic fields (max. 5 Tesla). As a consequence, information related to the growth mechanism of tubes was acquired. And also, SWNTs were synthesized in a magnetic field as strong as five tesla for the first time.Based on the above research findings, we succeeded in the synthesis and purification of SWNTs and supply quality SWNTs to other groups. As a result, we contributed to the property evaluation and application oriented research fields of this special research project.