Abstract: |
The invention provides a process for preparing carbon nano tube, which comprises the steps of, (1) providing a substrate, (2) depositing catalyst substrate on the substrate, (3) making the catalyst contact the carbon source gas at a predetermined temperature for a given period of time, thus making the carbon nano tube array of a specific length grow out substantially perpendicular to the substrate, (4) taking down the obtained carbon nano tube from the substrate. Compared with the prior art, the present invention realizes a uniform carbon nano tube preparation length, a controlled length and easiness for dispersion. |