Iron silicide-catalyzed growth of single-walled carbon nanotubes with a narrow diameter distribution

Single-walled carbon nanotubes (SWNTs) are synthesized from iron silicide (FeSi) catalyst by the chemical vapor deposition (CVD). During the growth process, Fe atoms migrate onto the FeSi surface and form active Fe nanoparticles, catalyzing the growth of SWNTs. The produced SWNTs demonstrate a narro...

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Bibliographic Details
Published in:Carbon (New York) 2019-08, Vol.149, p.139-143
Main Authors: Wu, Qianru, Ji, Zhonghai, Xin, Liantao, Li, Dong, Zhang, Lili, Liu, Chang, Yang, Tao, Wen, Zhijie, Wang, Haomin, Xin, Benwu, Xue, Han, Chen, Fushan, Xu, Ziwei, Cui, Hongzhi, He, Maoshuai
Format: Article
Language:English
Subjects:
Carbon
Carbon monoxide
Catalysis
Catalysts
Chemical synthesis
Chemical vapor deposition
Chirality
Intermetallic compounds
Iron silicide
Nanoparticles
Nanotubes
Organic chemistry
Raman spectroscopy
Single wall carbon nanotubes
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Summary:Single-walled carbon nanotubes (SWNTs) are synthesized from iron silicide (FeSi) catalyst by the chemical vapor deposition (CVD). During the growth process, Fe atoms migrate onto the FeSi surface and form active Fe nanoparticles, catalyzing the growth of SWNTs. The produced SWNTs demonstrate a narrow diameter/chirality distribution, possibly arising from the solid state of Fe nanoparticles and the use of carbon monoxide (CO) as the carbon source, which facilitates SWNT growth by perpendicular mode. Remarkably, (12, 6) SWNTs occupies more than 40% of all the SWNTs, as detected by Raman spectroscopy. This work opens an avenue for chirality selective synthesis of SWNTs by applying silicide as the catalyst. Fe atoms in iron silicate matrix migrate onto the particles surface to form active Fe nanoparticles during CO chemical vapor deposition, catalyzing the growth of SWNTs with a perpendicular mode and a narrow diameter/chirality distribution. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2019.04.059