In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes

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	In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes
	L. L. Zhang; P. X. Hou; S. S. Li; C. Shi; H. T. Gong; C. Liu; H. M. Cheng
	2014
Source Publication	Journal of Physical Chemistry Letters
ISSN	1948-7185
Volume	5 Issue:8 Pages:1427-1432
Abstract	The effect of sulfur on the catalytic nucleation and growth of single-wall carbon nanotubes (SWCNTs) from an iron catalyst was investigated in situ by transmission electron microscopy (TEM). The catalyst precursor of ferrocene and growth promoter of sulfur were selectively loaded inside of the hollow core of multiwall CNTs with open ends, which served as a nanoreactor powered by applying a voltage inside of the chamber of a TEM. It was found that a SWCNT nucleated and grew perpendicularly from a region of the catalyst nanoparticle surface, instead of the normal tangential growth that occurs with no sulfur addition. Our in situ TEM observation combined with CVD growth studies suggests that sulfur functions to promote the nucleation and growth of SWCNTs by forming inhomogeneous local active sites and modifying the interface bonding between catalysts and precipitated graphitic layers, so that carbon caps can be lifted off from the catalyst particle.
description.department	[zhang, lili ; hou, peng-xiang ; li, shisheng ; shi, chao ; gong, hong-tao ; liu, chang ; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; liu, c (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; cliu@imr.ac.cn
Keyword	Chemical-vapor-deposition Nanoparticles Nucleation Mechanism Dynamics Surface Fibers Phase
URL	查看原文
Language	英语
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/72963
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	L. L. Zhang,P. X. Hou,S. S. Li,et al. In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes[J]. Journal of Physical Chemistry Letters,2014,5(8):1427-1432.
APA	L. L. Zhang.,P. X. Hou.,S. S. Li.,C. Shi.,H. T. Gong.,...&H. M. Cheng.(2014).In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes.Journal of Physical Chemistry Letters,5(8),1427-1432.
MLA	L. L. Zhang,et al."In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes".Journal of Physical Chemistry Letters 5.8(2014):1427-1432.

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