Synthesis of Coil-Like Shape CNTs by Thermal CVD Method
The coil-like shape carbon nanotubes (CNTs) were synthesized on stainless steel substrates using acetylene gas (C2H2) at 750oC under pressure of 4110−× bar by thermal chemical vapor deposition (CVD) method. The formation of catalytic nanoparticles used hydrogen (H2) as the environment gas. The scanning electron microscope (SEM) image shown the average coil diameter of CNTs is 0.8µm and 0.1 nm for the average coil pitch of CNTs. The Raman spectrum shown the defect of CNTs and indicate that the carbon samples were tubes.
U. Pakdee et al., "Synthesis of Coil-Like Shape CNTs by Thermal CVD Method", Advanced Materials Research, Vols. 55-57, pp. 541-544, 2008