Journal Article10.1038/NMAT2531
Linking catalyst composition to chirality distributions of as-grown single-walled carbon nanotubes by tuning Ni x Fe 1− x nanoparticles
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TL;DR: It is shown that the chirality distribution of as-grown SWCNTs can be altered by varying the composition of Ni(x)Fe(1-x) nanocatalysts, which supports epitaxial models and is a step towards chiral-selective growth of SWC NTs.
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Abstract: Chirally pure single-walled carbon nanotubes (SWCNTs) are required for various applications ranging from nanoelectronics to nanomedicine. Although significant efforts have been directed towards separation of SWCNT mixtures, including density-gradient ultracentrifugation , chromatography and electrophoresis, the initial chirality distribution is determined during growth and must be controlled for non-destructive, scalable and economical production. Here, we show that the chirality distribution of as-grown SWCNTs can be altered by varying the composition of Ni(x)Fe(1-x) nanocatalysts. Precise tuning of the nanocatalyst composition at constant size is achieved by a new gas-phase synthesis route based on an atmospheric-pressure microplasma. The link between the composition-dependent crystal structure of the nanocatalysts and the resulting nanotube chirality supports epitaxial models and is a step towards chiral-selective growth of SWCNTs.
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Citations
Chirality-dependent growth of single-wall carbon nanotubes as revealed inside nano-test tubes
Marianna V. Kharlamova,Christian Kramberger,Takeshi Saito,Yuta Sato,Kazu Suenaga,Thomas Pichler,Hidetsugu Shiozawa +6 more
TL;DR: Growth dynamics of single-wall carbon nanotubes with nickelocene as a precursor encapsulated in the interior of template SWCNTs have been studied with multilaser Raman spectroscopy as discussed by the authors.
Plasma nanofabrication and nanomaterials safety
Zhao Han,Igor Levchenko,Igor Levchenko,Shailesh Kumar,M. M. A. Yajadda,M. M. A. Yajadda,Samuel Yick,Samuel Yick,Dong Han Seo,Dong Han Seo,Philip J. Martin,Sean A.F. Peel,Zdenka Kuncic,Ken Ostrikov,Ken Ostrikov +14 more
TL;DR: In this paper, the advantages of using plasmas as a safe nanofabrication tool are discussed, including the production of substrate-bound nanomaterials, isolation of humans from harmful nano-materials, and the effective reforming of toxic and flammable gases.
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Synthesis and characterization of Fe–Ni/ɣ-Al2O3 egg-shell catalyst for H2 generation by ammonia decomposition
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Review on the preparation of high value-added carbon materials from biomass
TL;DR: In this paper , the authors summarized the preparation technologies of high value-added carbon materials (HVCMs) such as activated carbon, carbon nanotubes, carbon carbon nanofibers and graphene, and made an in-depth study on the raw material selection, preparation methods, reaction conditions and formation mechanism of biomass-based HVCMs.
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Key roles of carbon solubility in single-walled carbon nanotube nucleation and growth
Maoshuai He,Hakim Amara,Hua Jiang,Jukka Hassinen,Christophe Bichara,Robin H. A. Ras,Juha Lehtonen,Esko I. Kauppinen,Annick Loiseau +8 more
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