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Chirality-dependent growth of single-wall carbon nanotubes as revealed inside nano-test tubes

Authors/others:Kharlamova, Marianna V.Kramberger, ChristianSaito, Takeshi (National Institute of Advanced Industrial Science and Technology (AIST)) Sato, Yuta (National Institute of Advanced Industrial Science and Technology (AIST)) Suenaga, Kazu (National Institute of Advanced Industrial Science and Technology (AIST)) Pichler, ThomasShiozawa, Hidetsugu
Abstract:Growth dynamics of single-wall carbon nanotubes (SWCNTs) have been studied with nickelocene as a precursor encapsulated in the interior of template SWCNTs. By means of multi-laser Raman spectroscopy, growth curves of nine different SWCNTs, (8,8), (12,3), (13,1), (9,6), (10,4), (11,2), (11,1), (9,3) and (9,2), have been determined upon in situ annealing at various temperatures. The data reveal that the nanotubes grow through fast and slow reaction pathways with high and low activation energies, respectively. While the activation energy of the slow growth is independent of the nanotube's chiral vector, that of the fast growth exhibits a monotonic increase as the tube diameter reduces from similar to 1.1 down to 0.8 nm and no dependency on the chiral angle, which can be attributed to the size-dependent properties of catalyst clusters. The chirality dependent catalytic growth properties exploited in this study provide the basis for a large-scale synthesis of single-chiral vector SWCNTs.
Number of pages:9
Date of publication:21.6.2017
Journal title:Nanoscale
Digital Object Identifier (DOI):https://doi.org/10.1039/c7nr01846k
Publication Type:Article
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