indicated that thicker, shorter and less curved
carbon nanotube at relatively lower reaction temperature ascribable to the reduced reaction rate. While the
growth behaviour of CNT with more thinner in width and longer in length at high temperature can be
understood by the fast reaction rate. In addition, nickel catalysts and induce carbon atoms can be
rearranged and diffused into the carbon fiber surface at high temperature, results in the formation of tiny
Ni nanoparticles on the surface and affect to the structure of carbon nanotube.