Carbon Nanotubes Synthesis via Arc Discharge with a Yttria Catalyst
Figure 5
SEM micrographs for the CNTs synthesized by using (1Y2O3, 4Ni, and 95C)% wt. catalyst. (a) A single or bundle tubs have average length 5–8 micrometer. (b) Low magnification shows some carbonaceous with catalyst residues. ((c), (d)) High magnifications indicates free tubes surface defects with average tube diameter ~10 nm.
