Metal-Catalyst-Free Growth of Single-Walled Carbon Nanotubes on Substrates

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• 作者：Shaoming Huang ; Qiran Cai ; Jiangying Chen ; Yong Qian ; Lijie Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：February 18, 2009
• 年：2009
• 卷：131
• 期：6
• 页码：2094-2095
• 全文大小：139K
• 年卷期：v.131,no.6(February 18, 2009)
• ISSN：1520-5126

文摘

In this communication, we have demonstrated that SiO₂ nanoparticles can be generated by simply scratching the quartz or silicon wafer with a SiO₂ layer and confirmed it to be active for the growth of SWNTs for the first time. Furthermore, the SWNTs from SiO₂ has a much narrower size distribution. This may open a way to control the diameter of the SWNTs. More importantly, our work has found a series of oxides including Al₂O₃, TiO₂, and rare earth oxides to be active for SWNT growth as well. These findings not only provide an alternative new type of catalysts for the growth of SWNTs but also give more insight into the role of the catalysts and a deeper understanding of the growth mechanism of SWNTs. The effective catalysts and catalytic activity for SWNT growth seem to be more size-dependent than the catalysts. Long oriented SWNTs generated from these catalysts enable us to rule out the relationship between the catalysts and the structures of the SWNTs. Thus controlled growth of SWNTs including the diameter and chirality is expected to be eventually realized.