Journal ArticleDOI
Exceptionally high Young's modulus observed for individual carbon nanotubes
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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
Citations
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Enhanced wear resistance and micro-hardness of polystyrene nanocomposites by carbon nanotubes
TL;DR: In this article, the microhardness of polystyrene-carbon nanotubes (PS-CNTs) nanocomposites with 0.4.0% content have been measured.
Journal ArticleDOI
Predicting the elastic properties of single-walled carbon nanotubes
Hongwu Zhang,J.B. Wang,Xu Guo +2 more
TL;DR: Based on the classical Cauchy-Born rule, a new computational method for the prediction of Young's modulus of single-walled carbon nanotubes is investigated in this paper, which circumvents the difficulties of high computational efforts by taking into consideration of the microstructure of nanotube and the atomic potential of hydrocarbons.
Journal ArticleDOI
Finite element simulation for estimating the mechanical properties of multi-walled carbon nanotubes
C. W. Fan,Y. Y. Liu,Chyanbin Hwu +2 more
TL;DR: In this paper, a finite element simulation technique for estimating the mechanical properties of multi-walled carbon nanotubes is developed, where the primary bonds between two nearest-neighboring atoms are treated as beam elements, and the beam element properties are determined via the concept of energy equivalence between molecular dynamics and structural mechanics.
Journal ArticleDOI
Underneath the fascinations of carbon nanotubes and graphene nanoribbons
TL;DR: In this paper, it was shown that the broken-bond-induced local bond contraction and bond strength gain, quantum entrapment and densification of charge and energy, polarization of the unpaired edge dangling σbond electrons, and the formation of the pseudo-πbond between the dangling bond electrons along the edges are responsible for the anomalies.
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In situ preparation and continuous fiber spinning of poly(p-phenylene benzobisoxazole) composites with oligo-hydroxyamide-functionalized multi-walled carbon nanotubes
TL;DR: A graft-from approach has been performed to achieve covalent functionalization of multi-walled carbon nanotubes (MWNTs) with oligo-hydroxyamide (oHA).
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.
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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.
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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.