High density carbon nanotube growth using a plasma pretreated catalyst

Zhang, C.; Xie, R.; Chen, B.; Yang, J; Zhong, G.; Robertson, J.

High density carbon nanotube growth using a plasma pretreated catalyst

2013

We have developed a direct current plasma pretreatment of the Fe catalyst to increase the area density of vertically-aligned carbon nanotube forests. The carbon wall density of the double- and multi-walled nanotubes reaches 4.8×10¹²cm⁻², with a 40% volume occupancy and a mass density of ∼0.4gcm⁻³. The plasma pretreatment works by reducing the sintering of the catalyst nanoparticles during growth. This treatment increases the forest density by 8times compared to the standard growth conditions.

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