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Raman spectra of isolated single-walled carbon nanotubes (SWNTs) were obtained for a wide range of laser excitation energies to study the resonance excitation window of the radial breathing mode feature for members of (2n+m) families. A chiral angle (θ) dependence of the resonance window width (Γ) was observed, which is much stronger than the diameter dependence. The implications of this work on nanotube metrology are discussed.National Student Clearinghouse. Research Center (Materials, Structures, and Devices Center)National Science Foundation (U.S.) (Grant 07-04197

Chiral angle dependence of resonance window widths in (2n+m) families of single-walled carbon nanotubes