Second-order overtone and combination modes in the LOLA region of acid treated double-walled carbon nanotubes.
Moderate acid treatment of double-walled carbon nanotubes (DWCNTs) has given rise to two new experimentally observed second-order double resonant Raman scattering frequencies centered at 1901 cm(-1) and 1942 cm(-1), in the highly dispersive LOLA region. These LOLA overtones and combination modes have been predicted by double resonance theory for two phonons associated with the K- and Gamma-points, respectively.
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Industrial Research Ltd., Nanotechnology Platform, P.O. Box 31310, Lower Hutt, New Zealand.
D000143:Acids / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013059:Spectrum Analysis, Raman
D000143:Acids; D037742:Nanotubes, Carbon