Title

High-density vertically aligned multiwalled carbon nanotubes with tubular structures

Authors

Vijaya Kayastha, Michigan Technological University
Yoke Khin Yap, Michigan Technological UniversityFollow
Zhengwei Pan, Oak Ridge National Laboratory,
Ilia Ivonov, Oak Ridge National Laboratory,
Alex Puretzky, Oak Ridge National Laboratory,
David Geohegan, Oak Ridge National Laboratory,

Document Type

Article

Publication Date

6-15-2005

Abstract

Ammonia (NH₃) gas was thought to be essential for the growth of vertically aligned multiwalled carbon nanotubes (VA-MWCNTs) and led to the formation of bamboo-like structures. Here, we show that VA-MWCNTs with ideal tubular structures can be grown on substrates by various mixed gases with or without NH₃ gas. The growth of these VA-MWCNTs is guided by a growth model that combined the dissociative adsorption of acetylene molecules (C₂H₂) and the successive vapor-liquid-solid growth mechanism. Results indicate that the key factor for growing these VA-MWCNTs is a balance between the decomposition rate of the C₂H₂ molecules on the iron catalyst and the subsequent diffusion and segregation rates of carbon.

Publisher's Statement

© 2005 American Institute of Physics. Publisher’s version of record: https://doi.org/10.1063/1.1952575

Publication Title

Applied Physics Letters

Recommended Citation

Kayastha, V., Yap, Y. K., Pan, Z., Ivonov, I., Puretzky, A., & Geohegan, D. (2005). High-density vertically aligned multiwalled carbon nanotubes with tubular structures. Applied Physics Letters, 86(25), 2583105-1-253105-3. http://doi.org/10.1063/1.1952575
Retrieved from: https://digitalcommons.mtu.edu/physics-fp/306

Version

Publisher's PDF