Title

Influence of the RF excitation of the catalyst system on the morphology of multiwalled carbon nanotubes (Retracted article. See vol. 116, pg. 18571, 2012)

Authors

Authors

A. S. Biris; T. C. Schmitt; R. B. Little; Z. Li; Y. Xu; A. R. Biris; D. Lupu; E. Dervishi; S. Trigwell; D. W. Miller;Z. Rahman

Comments

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Abbreviated Journal Title

J. Phys. Chem. C

Keywords

GROWTH; CCVD; DECOMPOSITION; ACETYLENE; HYDROGEN; SUPPORT; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

Abstract

Multiwalled carbon nanotubes were synthesized by catalytic chemical vapor deposition using two different methods of heating. By one method, an external resistive tube furnace was used, whereas the other method involved heating with radio frequency excitation by induction coil. A comprehensive comparison was made between these two methods with regards to feed gas utilization, nanotube growth efficiency, nanotube product characterization and morphology, and the formation of amorphous carbon and gaseous byproducts. The carbon nanotubes synthesized using radio frequency excitation exhibited smaller outer diameters, fewer carbon layers, less amorphous carbon, and superior crystalline properties than those produced by external tube furnace. The radio frequency process resulted in more rapid and sustained growth rates of the nanotubes and more efficient use of the carbon source. The reason for these enhanced effects by inductive heating may be due not only to the internally produced thermodynamic heat flow characteristics but perhaps also to induced electron currents generated within the magnetic and metallic catalytic clusters due to RF.

Journal Title

Journal of Physical Chemistry C

Volume

111

Issue/Number

48

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

17970

Last Page

17975

WOS Identifier

WOS:000251291900046

ISSN

1932-7447

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