Abstract Submitted to the    NANOTUBE'04 Conference:

Single-wall carbon nanohorns and nanotubes can be synthesized by submerged arc in water with support of N2 gas injection into the plasma zone to keep rapid quenching of carbon vapor in relatively inert environment. These single walled structures can be collected as floating powders separately from multi-wall carbon nanotubes which are contained in heavy deposits. This technique does not require costly facilities used in well-known methods for nanohorns production, such as pulsed-laser source. When pure graphite was used for anode, nanohorns was selectively produced. Single-wall carbon nanotubes were produced when a metallic catalyst such as Ni, Fe or Gd was doped in the graphite anode. There are the optimized concentrations of the doped catalysts and the current densities in this method.