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High-pressure optical absorption studies of double-walled carbon nanotubes.

Abstract : In this Letter the electronic properties of double-walled carbon nanotubes (DWCNTs) were studied by transmission measurements as a function of hydrostatic pressure up to 10 GPa. The energies of the optical transitions between the Van Hove singularities decrease with increasing pressure, which can be attributed to pressure-induced hybridization and symmetry-breaking effects. We observed a linear behaviour in the pressure-induced shift of the optical transitions. This is in good agreement with previous studies on single-walled carbon nanotubes (SWCNTs). High-resolution TEM image of a bundle of DWCNTs (A), histogram of the number of walls (B), and diameter distribution for CNT samples plotted from 100 HRTEM images (C).
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Jesús Marquina, Emmanuel Flahaut, Jesus Gonzalez. High-pressure optical absorption studies of double-walled carbon nanotubes.. physica status solidi (RRL) - Rapid Research Letters, Wiley-VCH Verlag, 2012, 6 (9-10), pp.382-384. ⟨10.1002/pssr.201206280⟩. ⟨hal-03468712⟩

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