Stack-coating of multishell carbon layers templated with carbon nanotubes
Stack-coating of multishell carbon layers templated with carbon nanotubes
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DOI：
10.1016/j.mtcomm.2019.100608
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发表时间：
2019-12-01
影响因子：
3.8
通讯作者：
Hashida, Toshiyuki
中科院分区：
文献类型：
--
作者：
Shirasu, Keiichi;Asaoka, Miho;Hashida, Toshiyuki
在碳纳米管（CNT）中，碳原子以规则的蜂窝晶格（即石墨烯）排列，其无缝地滚动以形成CNT的壁。然而，在现实中，碳纳米管具有结构缺陷，其形式为蜂窝晶格中的结构缺陷。这些缺陷在其生长期间被引入到管结构中，这导致其机械和其他物理性能降低。在这里，我们报告了一种替代使用的碳纳米管作为模板剂，用于形成具有高堆叠顺序和平行度的多壁碳层。这些模板化的纳米管壳通过乙烯在850 - 1000摄氏度的温度下分解而在多壁CNT（MWCNT）的表面上外延生长，而没有表面催化过程。单个多壁碳纳米管的拉伸测试表明，模板化的纳米管壳通过壳间交联与宿主纳米管表面固有地连接。利用Arrhenius图，系统地定量研究了不同温度和压力下模板化纳米管壳的生长模式。结果表明，在室温下可以合成出均匀的纳米管壳，
In a carbon nanotube (CNT), carbon atoms are arranged in regular honeycomb lattice (i.e. graphene), which rolls seamlessly to form walls of the CNT. However, in reality, CNTs have structural defects in the form of structural deficiencies in honeycomb lattice. These defects are introduced in the tube structure during their growth, which leads to reduce their mechanical and other physical properties. Here, we report an alternative use of CNTs as a templating agent for the formation of multi-walled carbon layers with high stacking order and parallelism. These templated nanotube shells are grown epitaxially on the surface of multi-walled CNTs (MWCNTs) by the decomposition of ethylene at the temperature of 850-1000 degrees C without a surface-catalyzed process. Tensile tests of individual MWCNTs demonstrate that the templated nanotube shells are inherently connected with the host nanotube surface through intershell crosslinks. By means of the Arrhenius plot, the growth mode of the templated nanotube shells for different temperatures and pressures is also systematically and quantitatively investigated. We show that the uniform nanotube shells are synthesized under the temperature of