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Electronic Band Structure of Coiled Carbon Nanotubes

100%
Milošević I., Damnjanović M.
Acta Physica Polonica A
|
2011
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vol. 120
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issue 2
221-223
EN
More than fifteen years have passed since the first report of experimental evidence of regularly coiled carbon nanotubes, but, the structure, formation mechanism and theoretical aspects of these nanotubes still remain unresolved. We propose model of hexagonal, helically coiled single wall carbon nanotubes, determine their line group symmetry and calculate electronic band structure of the relaxed configurations by means of fully symmetry adopted density functional tight binding method implemented into the POLSym code. Electrical properties of the straight and coiled carbon nanotubes of different chiralities are compared and analyzed.
2
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Diffraction from WS_2 and MoS_2 Nanotubes

81%
Damnjanović M., Vuković T., Milošević I.
Acta Physica Polonica A
|
2011
|
vol. 120
|
issue 2
224-226
EN
We present a symmetry based analysis of diffraction intensities of transition metal dichalcogenide nanotubes. Obtained results point out specific features of the intensity distribution that are related to group parameters. It is possible to read out all the group parameters from diffraction patterns, and therefore to characterize nanotube, since symmetry group uniquely determines the chiralty indices.
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