Atomic-scale structural identification and evolution of Co-W-C ternary SWCNT catalytic nanoparticles: High-resolution STEM imaging on SiO₂.

ABSTRACT: Recently, W-based catalysts have provided a promising route to synthesize single-walled carbon nanotubes (SWCNTs) with specific chirality, but the mechanism of the growth selectivity is vaguely understood. We propose a strategy to identify the atomic structure as well as the structure evolution of the Co-W-C ternary SWCNT catalyst. The key is to use a thin SiO₂ film as the catalyst support and observation window. As the catalyst is uniformly prepared on this SiO₂ film and directly used for the SWCNT synthesis, this method has an advantage over conventional methods: it creates an opportunity to obtain original, statistical, and dynamic understanding of the catalyst. As a technique, atomic-scale imaging directly on SiO₂ serves as a powerful and versatile tool

SUBMITTER: An H 

PROVIDER: S-EPMC6587631 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature