Synthesis of carbon nanotubes on graphene quantum dot surface by catalyst free chemical vapor deposition

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• 作者：Yun Liu ; Minghan Xu ; Xingzhong Zhu ; Minmin Xie ; Yanjie Su ; Nantao Hu ; Zhi Yang ; Yafei Zhang
• 刊名：Carbon
• 出版年：March, 2014
• 年：2014
• 卷：68
• 期：Complete
• 页码：399-405
• 全文大小：2372 K

文摘

The growth of carbon nanotubes (CNTs) on graphene quantum dot surface has been explored using acetylene as the carbon source in a catalyst free chemical vapor deposition process. Dynamic studies were conducted to observe the CNT growth. The obtained nanotubes have a diameter distribution of 10-30 nm and show medium graphitic quality. Transmission electron microscopy observations and dynamic studies indicate that the formation of CNTs follows a different mechanism from traditional growth models, in which a wire-to-tube process and self-assembling of CNTs are involved. On the basis of these observations, a tentative continuous growth model is proposed for the CNT growth.