Journal ArticleDOI
Exceptionally high Young's modulus observed for individual carbon nanotubes
TLDR
In this article, the amplitude of the intrinsic thermal vibrations of isolated carbon nanotubes was measured in the transmission electron microscopy (TEM) and it was shown that they have exceptionally high Young's moduli, in the terapascal (TPa) range.Abstract:
CARBON nanotubes are predicted to have interesting mechanical properties—in particular, high stiffness and axial strength—as a result of their seamless cylindrical graphitic structure1–5. Their mechanical properties have so far eluded direct measurement, however, because of the very small dimensions of nanotubes. Here we estimate the Young's modulus of isolated nanotubes by measuring, in the transmission electron microscope, the amplitude of their intrinsic thermal vibrations. We find that carbon nanotubes have exceptionally high Young's moduli, in the terapascal (TPa) range. Their high stiffness, coupled with their low density, implies that nanotubes might be useful as nanoscale fibres in strong, lightweight composite materials.read more
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Journal ArticleDOI
Carbon nanotube bundles under high pressure: Transformation to low-symmetry structures
TL;DR: In this paper, first-principles calculations were performed to model the structure transformations for crystalline bundles of single walled carbon nanotubes (10,10), (8,8), and (6,6) in response to external pressure.
Journal ArticleDOI
Key factors limiting carbon nanotube yarn strength: exploring processing-structure-property relationships.
Allison M. Beese,Allison M. Beese,Xiaoding Wei,Sourangsu Sarkar,Rajaprakash Ramachandramoorthy,Michael R. Roenbeck,Alexander P. Moravsky,Matthew Ford,Fazel Yavari,Denis T. Keane,Raouf O. Loutfy,SonBinh T. Nguyen,Horacio D. Espinosa +12 more
TL;DR: A new perspective on CNT yarn design is provided that can serve as a foundation for the development of future composites that effectively exploit the superior mechanical performance of CNTs.
Journal ArticleDOI
Mechanics of buckled carbon nanotubes on elastomeric substrates
TL;DR: In this article, the buckling of carbon nanotubes (CNTs) on elastomeric substrates was studied analytically and simple expressions of the buckle wavelength and amplitude and the critical strain for buckling were obtained.
PatentDOI
Synthesis of aligned carbon nanotubes on double-sided metallic substrate by chemical vapor depositon
TL;DR: In this paper, a set of aligned multi-walled carbon nanotubes were grown on both sides of a metallic or metal-coated substrate by water vapor-assisted chemical vapor deposition.
Journal ArticleDOI
An investigation of carbon nanotubes obtained from the decomposition of methane over reduced Mg1-xMxAl2O4 spinel catalysts
TL;DR: In this paper, the properties of carbon nanotubes produced by the treatment of Mg1−xMxAl2O4 spinels with an H2-CH4 mixture at 1070 °C have been investigated systematically.
References
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Book
Advanced Engineering Mathematics
TL;DR: This book discusses ODEs, Partial Differential Equations, Fourier Series, Integrals, and Transforms, and Numerics for ODE's and PDE's, as well as numerical analysis and potential theory, and more.
Journal ArticleDOI
Large-scale synthesis of carbon nanotubes
TL;DR: In this article, the authors used a variant of the standard arc-discharge technique for fullerene synthesis under a helium atmosphere, where a carbonaceous deposit formed on one of the graphite rods, consisting of a macroscopic (diameter of about 5 mm) cylinder.
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Advanced Engineering Mathematics. ByErwin Kreyszig. Pp. xx, 899. 68s. (Wiley.)
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Energetics of Nanoscale Graphitic Tubules
TL;DR: It is found that the strain energy per carbon relative to an unstrained graphite sheet goes as the inverse square of the tubule radius, R, and is insensitive to other aspects of the lattice structure, indicating that relationships derivable from continuum elastic theory persist well into the small radius limit.
Journal ArticleDOI
Growth, Structure, and Properties of Graphite Whiskers
TL;DR: Graphite whiskers have been grown in a dc arc under a pressure of 92 atmospheres of argon and at 3900°K as discussed by the authors, with recoverable lengths up to 3 cm. They are embedded in a solid matrix of graphite which builds up by diffusion of carbon vapor from the positive to the negative electrode.