Influence of the RF excitation of the catalyst system on the morphology of multiwalled carbon nanotubes (Retracted article.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

    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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