Abstract
An efficient method for purification of single-wall carbon nanotubes (SWNT) synthesized by the laser-vaporization process has been developed. Amorphous and crystalline carbon impurities and metal particles are removed from SWNT samples by ultrasonically-assisted microfiltration. Sample sonication during the filtration prevents filter contamination and provides for a fine nanotube-nanoparticle suspension throughout the purification process. The process generates SWNT material with purity of more than 90% and yields of 30-70%, depending on the quality of the starting material. Nanotubes in purified samples are shorter than in pristine samples due to some sonication-induced nanotube cutting. Nanotube bundles in purified samples are also substantially thicker due to spontaneous nanotube alignment.
Original language | English (US) |
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Pages (from-to) | 429-434 |
Number of pages | 6 |
Journal | Chemical Physics Letters |
Volume | 282 |
Issue number | 5-6 |
DOIs | |
State | Published - Jan 23 1998 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry