Improved Oxidation Resistance of Single-Walled Carbon Nanotubes Produced by Arc Discharge in a Bowl-like Cathode

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• 作者：Houjin Huang ; Julien Marie ; Hisashi Kajiura ; and Masafumi Ata
• 刊名：Nano Letters
• 出版年：2002
• 出版时间：October 2002
• 年：2002
• 卷：2
• 期：10
• 页码：1117 - 1119
• 全文大小：235K
• 年卷期：v.2,no.10(October 2002)
• ISSN：1530-6992

文摘

We report an improvement in oxidation resistance of single-walled carbon nanotubes (SWNTs) produced by arc discharge in a bowl-likecathode. The Raman spectrum of the new arc-discharge SWNTs shows a significant enhancement in the G/D (~1590:~1350 cm^-1) ratio,suggesting that cleaner and less defective SWNTs are generated by the new arc-discharge method compared to the conventional arc-dischargemethod. These changes are further confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Productionof improved SWNTs with better oxidation resistance is mainly ascribed to the in-situ annealing effect of the bowl-like cathode.