Author/Authors :
Cinke، نويسنده , , Martin X.D. Li، نويسنده , , Jing and Chen، نويسنده , , Bin and Cassell، نويسنده , , Alan and Delzeit، نويسنده , , Lance and Han، نويسنده , , Jie and Meyyappan، نويسنده , , M، نويسنده ,
Abstract :
Very high purity single-walled carbon nanotubes (SWNTs) were obtained from HiPco SWNT samples containing Fe particles by a two-step purification process. The raw and purified samples were characterized using high resolution transmission electron microscopy (HRTEM), Raman spectroscopy and thermogravimetric analysis (TGA). The purified sample consists of ∼0.4% Fe and the process does not seem to introduce any additional defects. The N2 adsorption isotherm studies at 77 K reveal that the total surface area of the purified sample increases to 1587 m2/g from 567 m2/g for the raw material, which is the highest value reported for SWNTs.
