Dynamic Catalyst Restructuring during Carbon Nanotube Growth
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- 作者：Michael Moseler ; Felipe Cervantes-Sodi ; Stephan Hofmann ; Gábor Csányi ; Andrea C. Ferrari
- 刊名：ACS Nano
- 出版年：2010
- 出版时间：December 28, 2010
- 年：2010
- 卷：4
- 期：12
- 页码：7587-7595
- 全文大小：565K
- 年卷期：0
- ISSN：1936-086X
文摘
We study the restructuring of solid nickel catalyst nanoparticles during carbon nanotube growth by environmental transmission electron microscopy and multiscale modeling. Our molecular dynamics/continuum transport calculations of surface-diffusion-mediated restructuring are in quantitative agreement with the experimentally observed catalyst shape evolutions. The restructuring time scale is determined by reduced Ni diffusion through the stepped Ni−C interface region where the catalyst surface strongly anchors to the growing nanotube.