Scalable growth of single-walled carbon nanotubes with a highly uniform structure

Author(s)
Aqeel Hussain, Er-Xiong Ding, Ben Mclean, Kimmo Mustonen, Saeed Ahmad, Mohammad Tavakkoli, Alister J. Page, Qiang Zhang, Jani Kotakoski, Esko I. Kauppinen
Abstract

Here, a scalable floating catalyst chemical vapor deposition (FCCVD) method is developed for the production of single-walled carbon nanotubes (SWCNTs) with a controlled structure. For the first time, water is used as the growth promoter in the FCCVD process to modulate the growth of SWCNTs. At an optimum water concentration ofca.115 ppm, the water-assisted FCCVD process synthesizes SWCNTs with a significantly narrow chirality distribution. In particular, the proportion of (9,8) and (8,7) semiconducting tubes was dramatically enhanced to 45% with 27% of the (9,8) tube in the end product. This is attributed to the changes in both the SWCNT diameter and the chiral angle. The experiment results and accurate quantum chemical molecular dynamics simulations show that the addition of water affects the nucleation and the size distribution of nanoparticle catalysts, thus resulting in the growth of SWCNTs with a highly uniform structure. This direct and continuous water-assisted FCCVD provides the possibility for the mass production of high-quality SWCNTs with a controlled structure.

Organisation(s)
Physics of Nanostructured Materials
External organisation(s)
Aalto University, University of Newcastle
Journal
Nanoscale
Volume
12
Pages
12263-12267
No. of pages
5
ISSN
2040-3364
DOI
https://doi.org/10.1039/d0nr01919d
Publication date
06-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
210004 Nanomaterials
Keywords
ASJC Scopus subject areas
Materials Science(all)
Portal url
https://ucris.univie.ac.at/portal/en/publications/scalable-growth-of-singlewalled-carbon-nanotubes-with-a-highly-uniform-structure(6c369c69-67c1-4c1f-a641-ac0f12551bfd).html