Fast growth of well-aligned carbon nanotubes by chemical vapor deposition on plain glass

Wellaligned carbon nanotubes (CNTs) were synthesized on a plain quartz substrate by chemical vapor deposition. This was done by the continuous supply and decomposition of a ferrocenexylene solution at 775?℃ for 60?min～120?min with N2 as the carrier gas. Experimental results show that well aligned CNTs formed at 775?℃ for a reaction time of 120?min have a length of 200?μm. Additionally, when extending the reaction time from 60?min to 120?min and keeping the reaction temperature of 775?℃, the length of the aligned CNTs increased from 100?μm to 200?μm, but their outer diameter had no obvious change. The fast growth of aligned CNTs is suggested to be a combined effect of lack of hydrogen, a high temperature and the continuous supply of catalysts under the present experimental conditions.