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
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Journal ArticleDOI
The structural evolution of thin multi-walled carbon nanotubes during isothermal annealing
J. Chen,J.Y. Shan,Takayuki Tsukada,Fuminori Munekane,A. Kuno,M. Matsuo,Takuya Hayashi,Yoong Ahm Kim,Morinobu Endo +8 more
TL;DR: In this article, the structural evolution of carbon nanotubes has been studied in the range from 1800 to 2200 °C and it has been shown that the lack of further structural ordering at temperatures above 2400 °C is the result of the limited space available for further structural development considering the nano-sized multi-walled carbon nanotsubes.
Journal ArticleDOI
Intrinsic thermal vibrations of suspended doubly clamped single-wall carbon nanotubes
TL;DR: In this paper, thermally driven mechanical vibrations of suspended doubly clamped carbon nanotubes, grown by chemical vapor deposition (CVD), are observed as a blurring in images taken with a scanning electron microscope.
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Preparation of copper nanoparticles on carbon nanotubes by electroless plating method
TL;DR: In this paper, one-step pretreatment of mixed HNO 3 and H 2 SO 4 was found effective in order to attain nanosized copper particles, the electroless plating parameters should be closely controlled; eg, the pH value of the plating solution, the temperature, and the concentration and titrating speed of HCOH.
Journal ArticleDOI
Preparation of multi-walled carbon nanotubes functionalized magnetic particles by sol-gel technology and its application in extraction of estrogens.
TL;DR: The results demonstrated that sol-gel technology was a feasible, simple and effective technique for the preparation of MWCNTs-OH functionalized magnetic silica particles.
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.