Chiral vector and metal catalyst-dependent growth kinetics of single-wall carbon nanotubes
Chiral vector and metal catalyst-dependent growth kinetics of single-wall carbon nanotubes
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DOI：
10.1016/j.carbon.2018.03.046
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发表时间：
2018-07-01
期刊：
影响因子：
10.9
通讯作者：
Shiozawa, Hidetsugu
中科院分区：
文献类型：
--
作者：
Kharlamova, Marianna V.;Kramberger, Christian;Shiozawa, Hidetsugu
单壁碳纳米管（SWCNTs）是由二茂钴和二茂镍在承载SWCNTs的内部热解合成的。原位拉曼光谱阐明了具有更快和更慢生长速率的九种不同手性载体（8，8）、（12，3）、（13，1）、（9，6）、（10，4）、（11，2）、（11，1）、（9，3）和（9，2）的SWCNT的生长动力学。快速生长的激活能随单壁碳纳米管直径的增加而单调增加，而缓慢生长的激活能没有表现出明显的依赖性，并且它们都不依赖于手性角。在给定的温度下，镍的内管的生长速率比钴的内管的生长速率高得多。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则与金属有关。在本研究中获得的信息是大规模和选择性合成的单手性单壁碳纳米管的应用程序所需的元素。(C)2018爱思唯尔有限公司版权所有。
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. (C) 2018 Elsevier Ltd. All rights reserved.