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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Temperature-dependent growth of carbon nanotubes by pyrolysis of ferrocene and acetylene in the range between 700 and 1000 °C
TL;DR: Aligned carbon nanotubes were grown by pyrolysis of ferrocene and acetylene in the temperature range 700-1000 °C as discussed by the authors. But their growth rate increases with the temperature.
Journal ArticleDOI
Synthesis of uniformly distributed carbon nanotubes on a large area of Si substrates by thermal chemical vapor deposition
Cheol Jin Lee,Dae Woon Kim,Tae Jae Lee,Young Chul Choi,Young Soo Park,Won Kim,Young Hee Lee,Wonbong Choi,Naesung Lee,Jong Min Kim,Yong Gak Choi,Soo Chang Yu +11 more
TL;DR: In this paper, the authors synthesize carbon nanotubes by thermal chemical vapor deposition of C2H2 on transition metal-coated silicon substrates, and demonstrate that the diameters of carbon-nanotubes can be controlled by applying the different transition metals.
Journal ArticleDOI
Multiwalled carbon nanotube (MWCNT) reinforced cellulose fibers by electrospinning.
Ping Lu,You-Lo Hsieh +1 more
TL;DR: Multiwalled carbon nanotubes (MWCNTs) were successfully incorporated in ultrafine cellulose fibers by electrospinning MWCNT-loaded cellulose acetate (CA) solutions, followed by deacetylation of CA to cellulose (cell).
Journal ArticleDOI
Influence of Surface Oxidation on the Aggregation and Deposition Kinetics of Multiwalled Carbon Nanotubes in Monovalent and Divalent Electrolytes
Peng Yi,Kai Loon Chen +1 more
TL;DR: The aggregation and deposition kinetics of two multiwalled carbon nanotubes (MWNTs) with different degrees of surface oxidation are investigated using time-resolved dynamic light scattering (DLS) and quartz crystal microbalance with dissipation monitoring (QCM-D) using X-ray photoelectron spectroscopy.
Journal ArticleDOI
Sound wave propagation in multiwall carbon nanotubes
J. Yoon,C. Q. Ru,A. Mioduchowski +2 more
TL;DR: In this article, the authors studied transverse sound wave propagation in individual multi-wall carbon nanotubes and showed that when the frequency is higher than at least one of the critical frequencies, non-coaxial vibrational modes emerge which propagate at various speeds significantly higher or lower than the speed predicted by the single-elastic beam model.
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.