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The alignment, orientation and morphologies of multi-walled carbon nanotubes (MWNTs) can be tailored by controlling catalyst deposition on porous silicon substrates. During the growth of MWNTs, H promoted the growth of carbon nanotubes and prevented the formation of amorphous carbon particles. With the introduction of H , the average diameter of MWNTs decreased from 130 nm to 15 nm, and the average growth rate of nanotubes increased from 50 nm/s to 145 nm/s. The use of CH as the carbon source resulted in single-walled carbon nanotubes (SWNTs) with an average diameter of 2 nm, and the use of CH as the carbon source resulted in MWNTs with an average diameter of 15 nm. 2 2 4 4

Original publication




Conference paper

Publication Date





121 - 126