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High crystallinity multi wall carbon nanotubes synthesized by inductive heating CCVD

A. R. BIRIS1,* , D. LUPU1, I. MISAN1, E. DERVISHI2, Z. LI2, Y. XU2, S. TRIGWELL3, A.S. BIRIS2,4

Affiliation

  1. National Institute for Research and Development of Isotopic and Molecular Technologies, P.O. Box 700, R-400293 Cluj-Napoca, Romania
  2. Nanotechnology Center, University of Arkansas at Little Rock, AR, 72204, USA
  3. ASRC Aerospace, Kennedy Space Center, FL, 32899, USA
  4. Applied Science Department, University of Arkansas at Little Rock, AR, 72204, USA

Abstract

Carbon nanotubes were synthesized by CCVD with inductive heating from acetylene on a Fe-Co/CaO catalyst obtained from the thermal decomposition of the Fe:Co:CaCO3 catalyst in nitrogen, previous to the growth process. MWCNTs were synthesized at 750, 850 and 950 oC and characterized by TEM, TGA and Raman Spectroscopy. The nanotubes presented a ratio of the outer to inner diameters between 2 to 3, and 90 % of all them have diameter values ranging from 5-25 nm, with an aspect ratio in the order of hundreds. As the reaction temperature increased, the synthesis efficiencies decreased and the amount of metallic nanoparticles encapsulated inside the nanotubes increased..

Keywords

Carbon nanotubes, CCVD – inductive heating, Acetylene, Calcium oxide.

Submitted at: Feb. 25, 2008
Accepted at: Aug. 28, 2008

Citation

A. R. BIRIS, D. LUPU, I. MISAN, E. DERVISHI, Z. LI, Y. XU, S. TRIGWELL, A.S. BIRIS, High crystallinity multi wall carbon nanotubes synthesized by inductive heating CCVD, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 9, pp. 2311-2315 (2008)