Direct Correlation of Carbon Nanotube Nucleation and Growth with the Atomic Structure of Rhenium Nanocatalysts Stimulated and Imaged by the Electron Beam
Direct Correlation of Carbon Nanotube Nucleation and Growth with the Atomic Structure of Rhenium Nanocatalysts Stimulated and Imaged by the Electron Beam
复制标题
DOI：
10.1021/acs.nanolett.8b02657
复制
发表时间：
2018-10-01
期刊：
影响因子：
10.8
通讯作者：
Khlobystov, Andrei N.
中科院分区：
文献类型：
--
作者：
Cao, Kecheng;Chamberlain, Thomas W.;Khlobystov, Andrei N.
用80 keV电子束激活单壁碳纳米管中的亚纳米Re簇，促进了新型碳纳米管的催化生长。透射电子显微镜以实时的原子分辨率，一步一步地对整个过程进行成像，揭示了初始成核之后两个阶段生长的细节。Re簇的原子动力学与纳米管的形成过程密切相关，当催化剂变得更有序时，生长加速。除了Re纳米团簇催化纳米管生长外，从纳米团簇中释放的单个Re原子也在纳米管的形成中起作用。
Subnanometer Re clusters confined in a single walled carbon nanotube are activated by the 80 keV electron beam to promote the catalytic growth of a new carbon nanotube. Transmission electron microscopy images the entire process step-by-step, with atomic resolution in real time, revealing details of the initial nucleation followed by a two-stage growth. The atomic dynamics of the Re cluster correlate strongly with the nanotube formation process, with the growth accelerating when the catalyst becomes more ordered. In addition to the nanotube growth catalyzed by Re nanoclusters, individual atoms of Re released from the nanocluster play a role in the nanotube formation.