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完美纳米管:长1米,比人头发细5万倍

已有 5063 次阅读 2012-6-26 18:52 |个人分类:新科技|系统分类:博客资讯| 碳纳米管, 超长, 超细

《科学日报》(Science Daily) 2012619报道了在适当的温度条件下,采用适当催化剂,有可能实现一个长100cm,比人头发细5万倍的完美单壁碳纳米管的形成。其实这项研究成果是美国赖斯大学机械工程与材料科学系的Feng DingBoris I. Yakobson,中国科学院上海技术物理研究所(Shanghai Institute for Technical Physics, Chinese Academy of Sciences)红外物理国家实验室的Qinghong Yuan,清华大学的Zhiping Xu以及香港理工大学的科研人员合作完成。此成果2012615发表在《物理评论快报》网站——Phys. Rev. Lett. 108, 245505 (2012) [5 pages]Efficient Defect Healing in Catalytic Carbon Nanotube Growth.

摘要如下:

The energetics of topological defects (TDs) in carbon nanotubes (CNTs) and their kinetic healing during the catalytic growth are explored theoretically. Our study indicates that, with the assistance of a metal catalyst, TDs formed during the addition of C atoms can be efficiently healed at the CNT-catalyst interface. Theoretically, a TD-free CNT wall with 108–1011 carbon atoms is achievable, and, as a consequence, the growth of perfect CNTs up to 0.1–100 cm long is possible since the linear density of a CNT is 100 carbon atoms per nanometer. In addition, the calculation shows that, among catalysts most often used, Fe has the highest efficiency for defect healing.



https://blog.sciencenet.cn/blog-212210-586145.html

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