Effects of synthesis conditions on the growth of MWCNTs using an ultra sonic evaporator with pyrolysis of hydrocarbon (IEEE-NANO paper #6/spl I.bar/1)

The solutions containing Co/Mo, Fe, Pt and ferrocene were utilized for the growth of carbon nanotubes using pyrolysis of hydrocarbon. The metal solutions evaporated by an ultra sonic evaporator were fed into the furnace at high temperatures. In the case of solutions containing Co/Mo, Fe and Pt, the gas-phase catalytic reaction of solution produced multi-wall carbon nanotubes (MWCNTs) and carbon nano onions (CNO). The outer diameter of most products was in the range from 10 to 30 nm. The XRD pattern of MWCNTs displayed a well graphitized structure. The Raman spectra confirmed that the products in this study were present to be MWCNTs. However, the catalytic pyrolysis of solution containing ferrocene produced aligned MWCNTs. The outer diameter of products was in the range from 50 to 100 nm.