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Chirality assignment of single-walled carbon nanotubes with strain
Lain-Jong Li1, R J Nicholas, R S Deacon
1Clarendon Laboratory, Physics Department, Oxford University, Parks Road, Oxford OX1 3PU, UK.
Physical Review Letters
|November 5, 2004
Abstract:
Strain-induced band gap shifts that depend strongly on the chiral angle have been observed by optical spectroscopy in single-walled carbon nanotubes (SWCNTs). Uniaxial and torsional strains are generated by changing the environment surrounding the SWCNTs, using the surrounding D2O ice temperature or the hydration state of a wrapping polymer. These methods are used as diagnostic tools to determine the quantum number q and examine chiral vector indices for specific nanotubes.