The kinetics of chirality assignment in catalytic single-walled carbon nanotube growth and the routes towards selective growth

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Title
The kinetics of chirality assignment in catalytic single-walled carbon nanotube growth and the routes towards selective growth
Author(s)
Ziwei Xu; Lu Qiu; Feng Ding
Publication Date
2018-03
Journal
CHEMICAL SCIENCE, v.9, no.11, pp.3056 - 3061
Publisher
ROYAL SOC CHEMISTRY
Abstract
Depending on its specific structure, or so-called chirality, a single-walled carbon nanotube (SWCNT) can be either a conductor or a semiconductor. This feature ensures great potential for building ∼1 nm sized electronics if chirality-selected SWCNTs could be achieved. However, due to the limited understanding of the growth mechanism of SWCNTs, reliable methods for chirality-selected SWCNTs are still pending. Here we present a theoretical model on the chirality assignment and control of SWCNTs during the catalytic growth. This study reveals that the chirality of a SWCNT is determined by the kinetic incorporation of pentagons, especially the last (6th) one, during the nucleation stage. Our analysis showed that the chirality of a SWCNT is randomly assigned on a liquid or liquid-like catalyst surface, and two routes of synthesizing chirality-selected SWCNTs, which are verified by recent experimental achievements, are demonstrated. They are (i) by using high melting point crystalline catalysts, such as Ta, W, Re, Os, or their alloys, and (ii) by frequently changing the chirality of SWCNTs during their growth. This study paves the way for achieving chirality-selective SWCNT growth for high performance SWCNT based electronics. © 2018 The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/5459
ISSN
2041-6520
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
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