NANOTUBE-NANOHORN COMPOSITE AND PROCESS FOR PRODUCTION THEREOF

An object of the present invention is to provide a nanotube-nanohorn complex having an aspect ratio higher than that of a conventional one, also having high dispersibility, and being capable of growing carbon nanotubes with controlled diameter. A nanotube-nanohorn complex according to the present invention comprises carbon nanohorns and catalyst fine particles supported within the carbon nanohorns. The carbon nanohorns comprise an aperture formed therein. Each of the catalyst fine particles is fitted and fixed in the aperture in a state in which part of the catalyst fine particle is exposed to the exterior of the carbon nanohorn. Carbon nanotubes are grown from the catalyst fine particles.