Fabrication of carbon nanotubes through metal-free chemical vapor deposition

摘要

We report a simple none-catalytic chemical vapor deposition technique for fabrication of carbon nanotubes (CNTs) on carbon black-CB surface at mild temperature.The topologically heterogeneous structure on carbon surface is a key factor for introducing the decomposition of gas hydrocarbons, and the micro-peripheral crystalline structures are proposed as epitaxial growing sites for self-assembling of the carbon nanotubes.Multi-Walled CNTs (MWCNTs) can be produced at 800℃ in the flow of C2H4/He on graphite surfaces that have been treated with nitric acids, oxygen or laser ablation.