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Publication Citation: Far Infrared Absorption Measurements of Single Walled Carbon Nanotubes

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Author(s): Shin G. Chou; Zeeshan Ahmed; Georgy Samsonidze; Jing Kong; Mildred Dresselhaus; David F. Plusquellic;
Title: Far Infrared Absorption Measurements of Single Walled Carbon Nanotubes
Published: January 17, 2011
Abstract: Variable temperature high resolution far infrared absorption measurements were carried out for single walled carbon nanotubes samples with different diameter distributions. At a temperature where kBT is significantly lower than the phonon energy, the broad absorption features as observed in room temperature become well resolved optical transitions. Lineshape analysis shows that the most of the transitions observed in the region are consistent with phonon transitions instead direct absorption from small-bandgap semiconducting nanotubes. The energies of the transitions are consistent with the phonon modes associated with circumferential motions such as squashing modes and higher order circumferential vibrations.
Conference: Materials Research Society Fall Meeting
Proceedings: Symposium C: Fundamentals of Low-Dimensional Carbon Nanomaterials
Location: Boston, MA
Dates: November 29-December 3, 2010
Keywords: carbon nanotubes; material science; nanotechnology; THz metrology
Research Areas: Optical Metrology, Nanomaterials, Materials Science