Effect of catalyst pretreatment on chirality-selective growth of single-walled carbon nanotubes
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Authors
Fouquet, M
Bayer, BC
Esconjauregui, S
Thomsen, C
Hofmann, Stephan https://orcid.org/0000-0001-6375-1459
Abstract
We show that catalyst pre-treatment conditions can have a profound effect on the chiral distribution in single-walled carbon nanotubes chemical vapor deposition. Using a SiO2-supported Cobalt model catalyst and pre-treatment in NH3, we obtain a comparably narrowed chiral distribution with a downshifted tube diameter range, independent of the hydrocarbon source. Our findings demonstrate that the state of the catalyst at the point of nanotube nucleation is of fundamental importance for chiral control, thus identifying the pre-treatment atmosphere as a key parameter for control of diameter and chirality distributions.
Description
Keywords
Single-walled Carbon Nanotubes, Chirality, Chemical Vapor Deposition, Pre-Treatment, Ammonia, Cobalt Catalyst
Journal Title
Journal of Physical Chemistry C
Conference Name
Journal ISSN
1932-7447
1932-7455
1932-7455
Volume Title
118
Publisher
American Chemical Society (ACS)
Publisher DOI
Sponsorship
European Research Council (279342)
B.C.B acknowledges a Research Fellowship at Hughes Hall, Cambridge. J.R. thanks the Alexander von Humboldt Foundation for support.