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We report the production of single-walled carbon nanotubes (SWNTs) under argon, nitrogen and helium atmospheres in the pressure range of 50 to 500 Torr using a continuous wave 10.6-μm CO 2 -laser. Both argon and nitrogen can be equally used as buffer gas to synthesize SWNTs in high yield between 200 and 400 Torr. Below 200 Torr the amount of SWNTs in the soot is drastically decreased and the...
The first results of a novel laser induced pyrolysis (LIP) method for high yield production of fullerene and single walled nanotubes are reported. The pyrolysis process of graphite targets is carried out by means of a continuous CO 2 laser under a flowing argon atmosphere. The vaporization of the targets and the deposition of the generated soot take place in a vertical experimental set-up.
Pyrolysis of benzene at ca 600–900 °C over Ni powder generated different types of carbon nanostructures possessing a wide range of morphologies. The effects of temperature and time on carbon nanotubes growth were evaluated. The deposited carbon yield was measured, and the quality of the nanotubes was analyzed by transmission electron microscopy (TEM).
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