Purification strategies and purity visualization techniques for single-walled carbon nanotubes

@article{Park2006PurificationSA,
  title={Purification strategies and purity visualization techniques for single-walled carbon nanotubes},
  author={Tae-Jin Park and Sarbajit Banerjee and Tirandai Hemraj-Benny and Stanislaus S. Wong},
  journal={Journal of Materials Chemistry},
  year={2006},
  volume={16},
  pages={141-154}
}
Traditionally, SWNTs have been prepared by electric arc-discharge, laser ablation, or chemical vapor deposition (CVD) methods, yielding tubes of various diameter and length distributions. However, without exception, as-prepared SWNTs are contaminated with a number of impurities, decreasing the overall yield of usable material. Impurities include transition metal catalysts, such as Fe, Co, and Ni, which are necessary for the growth of SWNTs as well as carbonaceous species such as amorphous… 
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