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Effect of water on resonant Raman spectroscopy of closed single‐walled carbon nanotubes
Author(s) -
Ghandour Ahmad J.,
Dunstan David J.,
Sapelkin Andrei,
Hernandez Ignacio,
Halsall Matthew P.,
Crowe Iain F.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201100074
Subject(s) - raman spectroscopy , carbon nanotube , materials science , blueshift , excitation , resonance (particle physics) , spectroscopy , molecular physics , laser , atomic physics , analytical chemistry (journal) , optics , nanotechnology , chemistry , optoelectronics , physics , photoluminescence , quantum mechanics , chromatography
Tunable Raman excitation spectroscopy with 1.55–1.77 eV laser energies was used to map the second van Hove singularities of semiconducting single‐walled carbon nanotubes ropes in air and immersed in water. The optical transitions are assigned to different ( n , m ) tubes using a correlation of the diameter and radial breathing mode (RBM) in the Raman spectrum. The resonance energies are blue‐shifted when the tubes are immersed in water and the shift depends on the chiral angle. In addition, the RBM frequencies are also blue‐shifted upon immersion in water.