A Caltech Library Service

Mechanisms of titania nanoparticle mediated growth of turbostratic carbon nanotubes and nanofibers

Kudo, A. and Steiner, S. A., III and Bayer, B. C. and Kidambi, P. R. and Hofmann, S. and Strano, M. S. and Wardle, B. L. (2017) Mechanisms of titania nanoparticle mediated growth of turbostratic carbon nanotubes and nanofibers. Journal of Applied Physics, 122 (1). Art. No. 014301. ISSN 0021-8979.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


Turbostratic carbon nanotubes (CNTs) and nanofibers (CNFs) are synthesized by chemical vapor deposition using titania nanoparticle catalysts, and a quantitative lift-off model is developed to explain CNT and CNF growth. Micron-scale long turbostratic CNTs and CNFs were observed when acetylene is utilized as a carbon feedstock, and an alumina substrate was incorporated to improve the homogeneity of catalyst distribution. Turbostratic CNTs/CNFs are always found attached to nanoparticle corners, in the absence of the graphitic cage that is typically observed with metal nanoparticle-mediated growth. The observed morphology in turbostratic CNTs/CNFs supports a model in which several layers of graphene lift off from high-curvature corners of the titania nanoparticle catalysts. This model explains a key feature, which differentiates the growth of turbostratic CNTs/CNFs via non-metallic nanoparticles from growth using standard metal nanoparticle catalysts. The observed CNT/CNF growth and the accompanying model can impact the assessment of other metal-oxide nanoparticle catalysts, with the findings here contributing to a metal-free synthesis of turbostratic CNTs/CNFs.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle Material
Kidambi, P. R.0000-0003-1546-5014
Additional Information:© 2017 Published by AIP Publishing. Received 30 March 2017; accepted 14 June 2017; published online 6 July 2017. This material is based upon work supported by the National Science Foundation under Grant No. 1007793 and was also supported by Airbus, Boeing, Embraer, Lockheed Martin, Saab AB, Spirit AeroSystems Inc., Textron Systems, ANSYS, Hexcel, and TohoTenax through MIT's Nano-Engineered Composite aerospace STructures (NECST) Consortium. This research was supported (in part) by the U.S. Army Research Office under Contract No. W911NF-13-D-0001. This work was performed in part at the Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Infrastructure Network (NNIN), which is supported by the National Science Foundation under NSF Award No. ECS-0335765. CNS is part of Harvard University. This work was carried out in part through the use of MIT Microsystems Technology Laboratories. Stephan Hofmann acknowledges funding from EPSRC under Grant No. EP/H047565/1. Akira Kudo acknowledges Itai Y. Stein (MIT) for helpful discussion.
Funding AgencyGrant Number
Lockheed MartinUNSPECIFIED
Spirit AeroSystems Inc.UNSPECIFIED
Textron SystemsUNSPECIFIED
Army Research Office (ARO)W911NF-13-D-0001
Engineering and Physical Sciences Research Council (EPSRC)EP/H047565/1
Issue or Number:1
Record Number:CaltechAUTHORS:20170727-081032897
Persistent URL:
Official Citation:Mechanisms of titania nanoparticle mediated growth of turbostratic carbon nanotubes and nanofibers. A. Kudo, S. A. Steiner, B. C. Bayer, P. R. Kidambi, S. Hofmann, M. S. Strano, and B. L. Wardle. Journal of Applied Physics 2017 122:1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79476
Deposited By: Tony Diaz
Deposited On:27 Jul 2017 15:53
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page