Growth Velocity and Direct Length-Sorted Growth of Short Single-Walled Carbon Nanotubes by a Metal-Catalyst-Free Chemical Vapor Deposition Process

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	Growth Velocity and Direct Length-Sorted Growth of Short Single-Walled Carbon Nanotubes by a Metal-Catalyst-Free Chemical Vapor Deposition Process
	B. L. Liu; W. C. Ren; C. Liu; C. H. Sun; L. B. Gao; S. S. Li; C. B. Jiang; H. M. Cheng
	2009
发表期刊	Acs Nano
ISSN	1936-0851
卷号	3 期号:11 页码:3421-3430
摘要	We report on the observation of a very low growth velocity of single-walled carbon nanotubes (SWNTs) and consequently the direct length-sorted growth and patterned growth of SWNTs by using a metal-catalyst-free chemical vapor deposition (CVD) process proposed recently by our group, in which SiO(2) serves as catalyst. We found that the growth velocity of the SWNTs from SiO(2) catalyst is only 8.3 nm/s, which is about 300 times slower than that of the commonly used iron group catalysts (Co as a counterpart catalyst in this study). Such a slow growth velocity renders direct length-sorted growth of SWNTs, especially for short SWNTs with hundreds of nanometers in length. By simply adjusting the growth duration, SWNTs with average lengths of 149, 342, and 483 nm were selectively obtained and SWNTs as short as similar to 20 nm in length can be grown directly, Moreover, comparative studies indicate that the SiO(2) catalyst possesses a much longer catalytic active time, showing sharp contrast with the commonly used Co catalyst which quickly loses its catalytic activity. Taking advantage of the very slow growth velocity of the SiO(2) catalyst, patterned growth of SWNT networks confined in a narrow region of <5 mu m was also achieved. The short SWNTs may show intriguing physics owing to their finite length effect and are attractive for various practical applications.
部门归属	[liu, bilu; ren, wencai; liu, chang; gao, libo; li, shisheng; jiang, chuanbin; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [sun, cheng-hua] univ queensland, sch engn, arc ctr excellence funct nanomat, brisbane, qld 4072, australia. [sun, cheng-hua] univ queensland, australian inst bioengn & nanotechnol, ctr computat mol sci, brisbane, qld 4072, australia.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;wcren@imr.ac.cn cheng@imr.ac.cn
关键词	Carbon Nanotubes Length Metal-catalyst-free Growth Velocity Catalyst Activity Patterned Growth Long Mechanism Arrays Nanoparticles Temperature Amplification Conductivity Dependence Networks Kinetics
URL	查看原文
WOS记录号	WOS:000271951200013
引用统计	被引频次：74[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32067
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. L. Liu,W. C. Ren,C. Liu,et al. Growth Velocity and Direct Length-Sorted Growth of Short Single-Walled Carbon Nanotubes by a Metal-Catalyst-Free Chemical Vapor Deposition Process[J]. Acs Nano,2009,3(11):3421-3430.
APA	B. L. Liu.,W. C. Ren.,C. Liu.,C. H. Sun.,L. B. Gao.,...&H. M. Cheng.(2009).Growth Velocity and Direct Length-Sorted Growth of Short Single-Walled Carbon Nanotubes by a Metal-Catalyst-Free Chemical Vapor Deposition Process.Acs Nano,3(11),3421-3430.
MLA	B. L. Liu,et al."Growth Velocity and Direct Length-Sorted Growth of Short Single-Walled Carbon Nanotubes by a Metal-Catalyst-Free Chemical Vapor Deposition Process".Acs Nano 3.11(2009):3421-3430.