Abstract Single-wall carbon nanotubes (SWCNTs) are synthesized by the pyrolysis of cobaltocene and nickelocene in the interior of hosting SWCNTs. In situ Raman spectroscopy elucidates growth kinetics of SWCNTs of nine different chiral vectors (8,8), (12,3), (13,1), (9,6), (10,4), (11,2), (11,1), (9,3) and (9,2) that features faster and slower growth rates. The activation energy of the faster growth increases monotonically with the SWCNT diameter, while that of the slower growth doesn't show a clear dependence, and neither of them depends on the chiral angle. At a given temperature the growth rates of the inner tubes are much higher with nickel than those with cobalt. The activation energy of the faster growth is found to be independent of the metal type, whereas that of the slower growth is metal-specific. The information obtained in the present study is elemental for a large-scale and selective synthesis of single-chirality SWCNTs that are demanded for applications.

中文翻译：

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单壁碳纳米管的手性载体和金属催化剂依赖性生长动力学

摘要 单壁碳纳米管 (SWCNTs) 是通过在宿主 SWCNTs 内部热解新钴和镍的热解合成的。原位拉曼光谱阐明了九种不同手性矢量 (8,8)、(12,3)、(13,1)、(9,6)、(10,4)、(11,2)、 (11,1)、(9,3) 和 (9,2) 具有更快和更慢的增长率。较快生长的活化能随单壁碳纳米管直径单调增加，而较慢生长的活化能不表现出明显的依赖性，且均不依赖于手征角。在给定的温度下，镍的内胎的生长速度比钴的快得多。发现较快生长的活化能与金属类型无关，而较慢生长的活化能是金属特异性的。