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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Journal ArticleDOI
Vibration of an embedded multiwall carbon nanotube
J. Yoon,C.Q. Ru,A. Mioduchowski +2 more
TL;DR: In this paper, the resonant frequencies and the associated vibrational modes of an individual multi-wall carbon nanotube embedded in an elastic medium are analyzed based on a multiple-elastic beam model, which considers intertube radial displacements and the related internal degrees of freedom.
Journal ArticleDOI
Carbon nanotubes – becoming clean
TL;DR: Carbon nanotubes (CNTs) are now well into their teenage years as discussed by the authors, and a variety of production methods for CNTs have been developed; chemical modification, functionalization, filling, and doping have been achieved; and manipulation, separation, and characterization of individual CNT is now possible.
Journal ArticleDOI
Effect of chemical functionalization on the mechanical properties of carbon nanotubes
Ajay Garg,Susan B. Sinnott +1 more
TL;DR: In this article, the effects of chemical attachments on the mechanical properties of single-walled carbon nanotubes are examined with classical molecular dynamics simulations and the maximum compressive (buckling) force for various functionalized and non-functionalized CNTs is calculated.
Journal ArticleDOI
Functionally Graded Composite Materials: An Overview
TL;DR: Functionally graded composite materials (FGCMs) are inhomogeneous materials, consisting of two (or more) different materials, engineered to have a continuously varying spatial composition profile as mentioned in this paper.
Journal ArticleDOI
Reinforcement mechanisms in MWCNT-filled polycarbonate
TL;DR: In this paper, the authors focused on the reinforcement mechanisms in multiwalled carbon nanotube (MWCNT)/bisphenol-A polycarbonate (PC) composites.
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.
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.