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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Physical properties of multiwalled carbon nanotubes
TL;DR: In this article, the morphology, structure, vibrational modes and crystalline perfection of multiwalled carbon nanotubes (MWNTs) were investigated by using scanning electron microscopy, high-resolution transmission electron microscope, an X-ray diffractometer and a Raman spectrometer.
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Polypyrrole coated carbon nanotubes : Synthesis, characterization, and enhanced electrical properties
TL;DR: In this paper, a simple approach to the synthesis of MWNT/polypyrrole nanotubes was described by the in situ chemical polymerization of pyrrole on the carbon nanotsubes using ferric chloride as an oxidant.
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Effect of nanotube waviness on the electrical conductivity of carbon nanotube-based composites
TL;DR: In this paper, the effect of nanotube waviness on the electrical conductivity of carbon-nanotube-based composites using a percolation model was investigated.
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Morphological characterization of single-walled carbon nanotubes-PP composites
TL;DR: In this article, a characterization of polypropylene matrix composites reinforced with single-walled nanotubes (PP-SWNTs) was performed by differential scanning calorimetry and Raman spectroscopy in order to obtain information on the matrix-nanotube interaction, on the crystallization kinetics of PP and especially on the macrostructure and organization of the Nanotubes in the composite.
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Nanotube-polymer adhesion: a mechanics approach
TL;DR: In this article, the interfacial shear strength in single-wall nanotube-polymer composites is calculated using a traditional force balance approach, modified for a hollow tube, and the effect of varying some of the model parameters is examined and discussed.
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.