Abstract
AbstractIn this work, we have studied the radial breathing mode (RBM) resonance Raman spectra of single‐wall carbon nanotube serpentines. Each serpentine consists of a series of straight, parallel, and regularly spaced segments, connected by alternating U‐turns formed on top of crystalline miscut quartz. We compare our ωRBM and Eii values with the results in the literature and find a strong environmental effect related to the tube–substrate interaction. We establish experimentally the ${\omega} _{{\rm RBM}} \, = \,(227/d_{{\rm t}} )\sqrt {1 + (0.082\,\pm \,0.009)d_{{\rm t}}^{2} } $ relation between RBM frequency (ωRBM) and tube diameter (dt), with a 100 ± 30 meV downshift in the optical transition energies with respect to the Eii values measured for the standard “super‐growth” samples.
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