Theoretical Investigations to Study the Effect of C2H2/H2 gas ratio on the Multi-walled Carbon Nanotubes Growth

摘要

Carbon Nanotubes are large macromolecules that are unique for their size, shape, and extraordinary physical properties. Their enthralling structures have sparked much interest in recent years and a large expanse of research has been devoted to their understanding. The theoretical model to investigate the effect of acetylene/hydrogen (C2H2/H2) gas ratio on the plasma assisted growth of multi-walled carbon nanotubes (MWCNTs) is developed. The present model accounts the charging rate equation of the MWCNTs, kinetics and energy balance equations of all the plasma species, energy balance of MWCNTs, and growth rate of MWCNTs in the reactive plasma composed of Acetylene + Hydrogen + Argon. In our investigations, it is established that the MWCNTs growth rate increases with increase in the acetylene/hydrogen gas ratio. Moreover, it is also found that the diameter of the CNT decreases with decrease in gas ratio.