High-purity aligned multi-walled carbon nanotubes (MWNTs) were synthesized through the catalytic decomposition of a ferrocene-xylene mixture at ~675°C in a quartz tube reactor and over quartz substrates, with a conversion of ~25% of the total hydrocarbon feedstock. Under the experimental conditions used, scanning electron microscope images reveal that the MWNT array grows perpendicular to the quartz substrates at an average growth rate of ~25 µm/h. A process of this nature which does not require preformed substrates, and which operates at atmospheric pressure and moderate temperatures, could be scaled up for continuous or semi-continuous production of MWNTs.
Additional Particle Information
“Growth of Tungsten Oxide Nanorods with Carbon Caps”, P. Kichambare, K-Fu Hii, R. Ryan Vallance, B. Sadanadan, A. M. Rao, K. Javed, M. Pinar Menguc, J. of Nanoscience and Nanotechnology 6, 536-540 (2006). “Coating Single-Walled Carbon Nanotubes with Phospholipids”, Y. Wu, J. S. Hudson, Q. Lu, J. M. Moore, A. S. Mount, A. M. Rao, E. Alexov, and P. C. Ke, J. of Physical Chem. B, 110, 2475-2478 (2006). “Determination of the Bending Modulus of an Individual Multiwall Carbon Nanotube using an Electric