Abstract
In this work, single wall carbon nanotubes (SWNTs) were synthesized by the pyrolysis of alcohol in a CVD process and characterized. The catalyst was fabricated by depositing Fe and Mo particles on the surface of MgO powders by sol-gel methode. In this experiment, the effects of different surface areas of the catalyst support were discussed. SWNTs were synthesized on the surface of Fe-Mo/MgO under 5torr C2H5OH atmosphere at 900°C. From FESEM observation, SWNTs were found flake-like structure. SWNTs have diameters in the range of 0.6-1.6 nm in bundles and in the range of 2.4-6 nm for isolated SWNTs. Raman spectrum shows that SWNTs in this experiment have low ID/IG value which means high purity and high quality of SWNTs, and that SWNTs have diameters in the range of 0.6-1.6 nm as calculated from the RBM peaks. From DTA-TGA analysis, high-purity of SWNTs was demonstrated. The extremely low turn-on field (Eto=0.008 V/μm) and threshold field (Ethr=0.07 V/μm) show that the SWNTs have excellent performance on electron field emission.