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High‐pressure optical absorption studies of double‐walled carbon nanotubes
Author(s) -
Marquina Jesús,
Flahaut Enmanuel,
González Jesús
Publication year - 2012
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201206280
Subject(s) - carbon nanotube , high resolution transmission electron microscopy , hydrostatic pressure , materials science , absorption (acoustics) , molecular physics , optical properties of carbon nanotubes , nanotechnology , optics , condensed matter physics , composite material , chemistry , transmission electron microscopy , nanotube , physics , thermodynamics
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). (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)