Journal ArticleDOI
Electron microscopy study of coiled carbon tubules
D. Bernaerts,X.B. Zhang,X. F. Zhang,S. Amelinckx,G. Van Tendeloo,J. Van Landuyt,V. Ivanov,Janos B. Nagy +7 more
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TLDR
In this article, the structure of carbon fibres was studied by means of various electron diffraction techniques and by electron microscopy, and it was shown that the tubules are hollow and consist of concentric cylindrical graphene sheets.Abstract:
Carbon fibres prepared by the catalytic decomposition of acetylene over finely dispersed cobalt, supported on amorphous silica, are often helix shaped. The structure of such carbon fibres was studied by means of various electron diffraction techniques and by electron microscopy. It was shown that the tubules are hollow and consist of concentric cylindrical graphene sheets. The diffraction patterns are analysed in detail and compared with theoretically predicted patterns. Good semi-quantitative agreement is found. It is shown that the helices are polygonized; their atomic structure is consistent with models predicted on the basis of molecular dynamics simulations.read more
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Nanometre-size tubes of carbon
TL;DR: In this paper, the authors review the present state of understanding of the structure, growth and properties of nanometre-size tubes of carbon and present promising areas of future applications, for example as tiny field-emitting devices, micro-electrodes, nanoprobes and hydrogen storage material.
Journal ArticleDOI
Metal particle catalysed production of nanoscale BN structures
Mauricio Terrones,Wen-Kuang Hsu,Humberto Terrones,J. P. Zhang,Salvador Ramos,J. P. Hare,Rolando Castillo,Kosmas Prassides,Anthony K. Cheetham,Harold W. Kroto,D. R. M. Walton +10 more
TL;DR: In this article, high resolution electron microscopy (HRTEM), electron energy loss spectroscopy (EELS) and X-ray diffraction studies have been used to study these new materials, which contain B:N ratios of ≈ 1:1.
Journal ArticleDOI
Catalytic production and purification of nanotubules having fullerene-scale diameters
TL;DR: In this article, carbon nanotubules were produced in a large amount by catalytic decomposition of acetylene in the presence of various supported transition metal catalysts and the influence of different parameters such as the nature of the support, the size of active metal particles and the reaction conditions on the formation of nanotubes was studied.
Journal ArticleDOI
Kinks, rings, and rackets in filamentous structures.
TL;DR: It is shown that the slender geometry is a more important determinant of the morphology than any molecular details and mesoscopic continuum theory is capable of quantifying observations of these structures and is suggestive of their occurrence in other filamentous assemblies.
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Coiled carbon nanotubes: Synthesis and their potential applications in advanced composite structures
TL;DR: A critical review on the synthesis of the coiled carbon nanotubes and their applications in advanced composites is given in this article, where a critical review of the nanotube synthesis and their application in advanced composite is given.
References
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Journal ArticleDOI
Helical microtubules of graphitic carbon
TL;DR: Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.
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Single-shell carbon nanotubes of 1-nm diameter
Sumio Iijima,Toshinari Ichihashi +1 more
TL;DR: In this article, the authors reported the synthesis of abundant single-shell tubes with diameters of about one nanometre, whereas the multi-shell nanotubes are formed on the carbon cathode.
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Electronic structure of chiral graphene tubules
TL;DR: In this paper, the electronic structure for graphenemonolayer tubules is predicted as a function of the diameter and helicity of the constituent graphene tubules, and it is shown that approximately 1/3 of these tubules are a one-dimensional metal which is stable against a Peierls distortion, and the other 2/3 are onedimensional semiconductors.
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Filamentous growth of carbon through benzene decomposition
TL;DR: Carbon fibres have been prepared by pyrolysing a mixture of benzene and hydrogen at about 1100°C and have been studied by high resolution electron microscopy.
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Catalytic growth of carbon filaments
TL;DR: A review of the information obtained by the author and his many co-workers from studies devoted to the formation of a fascinating material, filamentous carbon, is given in this article.