Issue 34, 2014

A coaxial structure of multiwall carbon nanotubes on vertically aligned Si nanorods and its intrinsic characteristics

Abstract

We present a unique process for fabricating silicon nanorods wrapped with a graphitic material on a silicon substrate by the chemical vapor deposition method with no metal catalyst, as well as characterization of their intrinsic properties. First, well-ordered silicon nanorod axes were grown via an electroless metal deposition method, followed by chemical vapor deposition to wrap the axes with a carbon nanotube. Interestingly, the use of ethanol treatment before chemical vapor deposition prevents the formation of SiOx layers, which may be necessary as seed layers for carbon nanotube growth. Since this method for carbon nanotube growth does not involve a metal catalyst, the intrinsic properties of the Si NRs were well characterized. A few characterization methods (XPS, Raman spectroscopy, and EELS) were carried out to prove that the Si NRs were completely surrounded by CNTs. In addition, the conductance results (by terahertz time-domain spectroscopy) show that the charge carrier transport characteristics of the multiwall carbon nanotubes are found mainly in the outermost shell, and that the Si NR surface was well passivated by the multiwall carbon nanotube structure. This coaxial structure, which does not require a metal catalyst, represents a significant step forward for realizing applications for carbon nanotube devices.

Graphical abstract: A coaxial structure of multiwall carbon nanotubes on vertically aligned Si nanorods and its intrinsic characteristics

Supplementary files

Article information

Article type
Paper
Submitted
13 Jun 2014
Accepted
30 Jun 2014
First published
30 Jun 2014

J. Mater. Chem. C, 2014,2, 6985-6990

A coaxial structure of multiwall carbon nanotubes on vertically aligned Si nanorods and its intrinsic characteristics

S. Kim, J. Kim, J. Lim, H. Lee, Y. Jun and D. Kim, J. Mater. Chem. C, 2014, 2, 6985 DOI: 10.1039/C4TC01251H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements