| abstract |
Straight, nano-scale-order amorphous carbonntubes having a long-term stable ability for storingnvarious kinds of gases and being stable in shape, and annovel process for producing said carbon tubes with highnpurity, high yield and high mass-productivity are provided. n The amorphous nano-scale carbon tubes arenprepared by subjecting a heat-decomposable resin having andecomposition temperature of 200 to 900°C to an excitationntreatment in the presence of a metal powder and/or a metalnsalt, or by subjecting a carbon material containing -C≡C-and/orn=C= to a heat-treatment at 3000°C or lower. |