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arXiv 0903.5359cond-mat.mtrl-scicond-mat.other
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获得高富集度金属单壁碳纳米管的新方法

A New Method of Obtaining High Enrichment of Metallic Single-Walled Carbon Nanotubes

Rakesh Voggu, A. Govindaraj, C. N. R. Rao

摘要:

研究了含Ni和Y_2O_3的碳电极在Fe(CO)_5蒸气存在下的电弧放电。据发现,与阴极沉积物不同,沉积在腔室中的网状物主要含有金属性单壁碳纳米管(SWNTs),如拉曼光谱和光学吸收光谱所证明的。金属单壁碳纳米管的百分比随Fe(CO)5的浓度而增加。在最佳条件下,网包含超过90%的金属单壁碳纳米管。该方法能够大规模合成几乎纯的金属SWNT。

英文摘要:

Arc-discharge with carbon electrodes containing Ni and Y2O3 in the presence of Fe(CO)5 vapors have been investigated. It is found that unlike the cathode deposit, the web deposited in the chamber contains mainly metallic single-walled carbon nanotubes (SWNTs) as evidenced from Raman and optical absorption spectroscopy. The percentage of metallic SWNTs increases with the concentration of Fe(CO)5. Under optimal conditions, the web contains over 90% of metallic SWNTs. This method enables the synthesis of nearly pure metallic SWNTs on a large scale.

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