Structures, Symmetries, Mechanics and Motors of carbon nanotubes

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

18 pages+5 figure; will appear as a Chapter in "Nanotubes: New Research" (Nova Science Publishers, 2005)

Scientific paper

The structures and symmetries of single-walled carbon nanotubes (SWNTs) are introduced in detail. The physical properties of SWNTs induced by their symmetries can be described by tensors in mathematical point of view. It is found that there are 2, 4, and 5 different parameters in the second, third, and fourth rank tensors representing electronic conductivity (or static polarizability), the second order nonlinear polarizability, and elastic constants of SWNTs, respectively. The values of elastic constants obtained from tight-binding method imply that SWNTs might be very weakly anisotropic in mechanical properties. The further study on the mechanical properties shows that the elastic shell theory in the macroscopic scale can be applied to carbon nanotubes (CNTs) in the mesoscopic scale, as a result, SWNTs can be regarded as an isotropic material with Poisson ratio, effective thickness, and Young's modulus being $\nu=0.34$, $h=0.75$\AA, $Y=4.70$TPa, respectively, while the Young's moduli of multi-walled carbon nanotubes (MWNTs) are apparent functions of the number of layers, $N$, varying from 4.70TPa to 1.04TPa for N=1 to $\infty$. Based on the chirality of CNTs, it is predicted that a new kind of molecular motor driven by alternating voltage can be constructed from double walled carbon nanotubes (DWNTs).

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Structures, Symmetries, Mechanics and Motors of carbon nanotubes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Structures, Symmetries, Mechanics and Motors of carbon nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structures, Symmetries, Mechanics and Motors of carbon nanotubes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-396829

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.