Title

Synthesis of vertically aligned single- and double-walled carbon nanotubes without etching agents

Document Type

Article

Publication Date

6-20-2007

Department

Department of Physics

Abstract

The number of graphene shells on carbon nanotubes (CNTs) can be rationally controlled to yield high-density, vertically aligned single- and double-walled CNTs. This was obtained by thermal chemical vapor deposition at 700 °C without the use of etching agents such as water, oxygen, or plasma. The key factors for this success are controlled dissociative adsorption of acetylene (C2H2) molecules and subnanometer thickness control of the Al/Fe/Mo trilayer films. We propose that an Al concave meniscus confines the actual growth surface areas of Fe/Mo catalytic nanoparticles and enables the control of the number of graphene shells on CNTs.

Publisher's Statement

© 2007 American Chemical Society. Publisher's version of record: https://doi.org/10.1021/jp073551l

Publication Title

The Journal of Physical Chemistry C

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