Journal ArticleDOI
Exceptionally high Young's modulus observed for individual carbon nanotubes
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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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Well-aligned polyaniline/carbon-nanotube composite films grown by in-situ aniline polymerization
TL;DR: In this article, multiwalled carbon nanotubes (MWNTs) encapsulated by polyaniline (PANI) of nanometer size have been synthesized by in-situ polymerization, and are found to be orientationally ordered by the aligned MWNTs.
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Isothermal Crystallization of Poly(l-lactide) Induced by Graphene Nanosheets and Carbon Nanotubes: A Comparative Study
TL;DR: In this paper, the effects of differently dimensional nanoparticles on the crystallization behavior of poly(l-lactide) matrices were investigated using time-resolved Fourier transform infrared spectroscopy (FTIR) and wide-angle X-ray diffraction (WAXD).
Journal ArticleDOI
Macroscopic properties of carbon nanotubes from molecular-mechanics simulations
Aaron Sears,Romesh C. Batra +1 more
TL;DR: In this paper, the authors compared the Young's modulus values of single wall and multi-wall carbon nanotubes from various investigators, from molecular mechanics simulations and experimental data.
Journal ArticleDOI
An analytical molecular structural mechanics model for the mechanical properties of carbon nanotubes
TL;DR: In this article, an analytical molecular structural mechanics model for the prediction of mechanical properties of defect-free carbon nanotubes is developed by incorporating the modified Morse potential with an analytical Molecular Structural Model (MSMM) for predicting Young's moduli, Poisson's ratios and stress-strain relationships of carbon nanoteams under tension and torsion loading conditions.
Journal ArticleDOI
Time-resolved fluorescence of carbon nanotubes and its implication for radiative lifetimes.
TL;DR: A radiative lifetime of 110 ns is deduced from the measured decay rate and a determination of fluorescence quantum efficiency, which explains the relatively low observed fluorescence efficiency in isolated SWNTs.
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.