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
Citations
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Characterization of CNTs-modified HMA’s mechanical properties
Mahyar Arabani,Masoud Faramarzi +1 more
TL;DR: In this paper, the functional properties of neat and carbon nanotubes (CNTs)-modified asphalt mixtures were evaluated in nano-scale by scanning electron microscopy (SEM).
Journal ArticleDOI
Single-walled carbon nanotube purification, pelletization, and surfactant-assisted dispersion: a combined TEM and resonant micro-raman spectroscopy study.
Kai Shen,Seamus A. Curran,Huifang Xu,Snezna Rogelj,Ying-Bing Jiang,James Dewald,Tanja Pietrass +6 more
TL;DR: Single-walled nanotube (SWNT) bundle size decreases during ultrasonication dispersion aided by a surfactant, and SWNT bundles composed of large-diameter tubes are prone to debundling.
Journal ArticleDOI
Review on micromechanics of nano- and micro-fiber reinforced composites
TL;DR: In this article, the prediction of thermomechanical properties of fiber reinforced composites using several micromechanics models is discussed, such as strength of material approach, Halpin-Tsai equations, multi-phase mechanics of materials approaches, multiphase Mori-Tanaka models, composite cylindrical assemblage model, Voigt-Reuss models, modified mixture rule, Cox model, effective medium approach and method of cells.
Journal ArticleDOI
Tailoring polyacrylonitrile interfacial morphological structure by crystallization in the presence of single-wall carbon nanotubes.
TL;DR: Three distinct interfacial coating morphologies of PAN are observed on SWNT under the semidilute polymer concentration regime subjected to shearing, and hybrid periodic shish-kebab structures and dilute PAN/SWNT quiescent solutions subjected to rapid cooling results in the formation of an irregular PAN crystalline coating on the SWNT.
Journal ArticleDOI
Effects of oxygen annealing on gas sensing properties of carbon nanotube thin films
Luca Valentini,Luca Lozzi,Carlo Cantalini,Ilaria Armentano,Jose Maria Kenny,Luca Ottaviano,Sandro Santucci +6 more
TL;DR: In this paper, carbon nanotubes (CNTs) thin films deposited by plasma enhanced chemical vapor deposition have been investigated as resistive gas sensors towards NO2 oxidizing gas.
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.