Abstract: Carbon nanotubes were synthesized on anodic aluminum oxide (AAO) template by chemical vapor deposition catalyzed by electrodeposited cobalt particles in its pores. The growth of the carbon nanotubes on the basis of top-growth model is fast. Sonication cutting process was applied to shorten the outgrown carbon nanotubes to get aligned carbon nanotube film. With the increase of sonicating time, the ordered orientation of carbon nanotubes on the AAO template is improved. Meanwhile, cobalt catalyst on the top of the carbon nanotube is cut off during the sonication. So the end-opened aligned carbon nanotube film is obtained at last. The mechanism of this treatment is also discussed.

Key words: Aligned carbon nanotubes, Anodic aluminum oxide(AAO) template, 　Sonication cutting