| Synthesis of single-walled carbon nanotubes using laser-vaporized metal nanoparticle catalyst Masamichi Kohno*, Teppei Kawahara, Masahiro Tomoda, Yasuyuki Takata, Shuhei Inoue, Shinzo Suzuki, Shigeo Maruyama
The Journal of Mechanical Science and Technology, vol. 25, no. 1, pp.11-15, 2011
Abstract : SWNTs were synthesized by laser-vaporized CCVD (catalytic chemical vapor deposition). The diameter distributions and the abundance
of SWNTs synthesized at different temperatures and using different catalysts were investigated by Raman spectroscopy. Further,
this technique was compared with other synthesis techniques (laser-oven and conventional-alcohol CCVD), and C60 was synthesized
simultaneously as a byproduct only using the laser-oven technique. With increasing synthesis temperature, the diameter distribution
shifted towards larger diameters, and the G/D ratio became larger as the synthesis temperature increased to 1000°C. Ni, Co, and Fe
played a catalytic role, though Fe was less effective under our experimental conditions. The diameter distribution of SWNTs synthesized
with the Fe catalyst was shifted to smaller values compared to those synthesized with Ni or Co catalysts.
Keyword :
SWNTs; Laser vaporization; CVD; Raman spectroscopy
|
