Abstract
The temperature effect on the interband transition energy (Eii) of bundled single-walled carbon nanotubes (SWCNTs) has been studied by Raman spectroscopy. The results indicate that a temperature change can effectively adjust the Eii leading to energy-resonance with excitation laser energy (Elaser), which induces a resonance enhancement of radial breathing modes (RBMs) of SWCNTs. This phenomenon has been called the “temperature scanning resonant focal effect.” This effect affords great potential for “focusing” and enhancing the RBMs of SWCNTs with different diameters and for further characterizing the type of SWCNT, e.g., semiconducting or metallic.
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