Abstract
Single-wall carbon nanotube (SWNT) samples grown by the CoMoCAT method are investigated by resonance Raman scattering and optical absorption. The environment effects in the population of the different ( n, m) nanotubes present in the samples are characterized for DNA-wrapped nanotubes and the results are compared with SDS-wrapped CoMoCAT nanotubes. A significant decrease in the Raman intensity of metallic nanotubes is observed in the DNA-wrapped sample as compared to the SDS-wrapped sample, supporting the DNA-based separation method. This result is confirmed by optical absorption measurements in both samples.
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