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从固态碳化铁纳米颗粒原位观察碳纳米管生长的原子尺度研究。

Atomic-scale in-situ observation of carbon nanotube growth from solid state iron carbide nanoparticles.

作者信息

Yoshida Hideto, Takeda Seiji, Uchiyama Tetsuya, Kohno Hideo, Homma Yoshikazu

机构信息

Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan.

出版信息

Nano Lett. 2008 Jul;8(7):2082-6. doi: 10.1021/nl080452q. Epub 2008 May 28.

DOI:10.1021/nl080452q
PMID:18505300
Abstract

We have first observed the nucleation and growth process of carbon nanotubes (CNTs) from iron carbide (Fe 3C) nanoparticles in chemical vapor deposition with C 2H 2 by in situ environmental transmission electron microscopy. Graphitic networks are formed on the fluctuating iron carbide nanoparticles, and subsequently CNTs are expelled from them. Our atomic scale observations suggest that carbon atoms diffuse through the bulk of iron carbide nanoparticles during the growth of CNTs.

摘要

我们首次通过原位环境透射电子显微镜观察了在以C₂H₂为碳源的化学气相沉积过程中，碳化铁（Fe₃C）纳米颗粒形成碳纳米管（CNT）的成核和生长过程。在起伏的碳化铁纳米颗粒上形成了石墨网络，随后碳纳米管从这些颗粒中排出。我们的原子尺度观察表明，在碳纳米管生长过程中，碳原子在碳化铁纳米颗粒内部扩散。

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