Baddour et al. have grown CNTs on stainless steel particles with
CVD in a fluidized bed system (FBCVD) to increase the yield [18].
However, compared with the traditional TCVD methods and
FBCVD, the spray pyrolysis method (SPCVD) has many advantages
such as the possibility of a substrate-free, continuous reaction, and
shorter heating or cooling time for the furnace [19e22].