Production of iron nanotubes in plasma

The paper presents the experimental installation, the procedure of obtainment and some mechanisms of iron nanotubes formation in plasma. The inner and outer diameters of nanotubes produced in this manner are located within regions like 0.1–0.45 nm and 2.2–14 nm, respectively. The length takes values between 5 and 12 nm. We emphasize that a quantized description of diameters formation is conceivable. To this aim a diameter quantum like diq ≈ 1.2 nm can be proposed.The experimental results obtained are discussed.