High quality double wall carbon nanotubes synthesized by RF chemical vapor deposition

PHYS 407

Alexandru R. Biris, biris@oc1.itim-cj.ro1, Dan Lupu, lupu@oc1.itim-cj.ro1, A. Grüneis2, P. Ayala3, M. Rümmeli2, T. Pichler2, Zhongrui Li, zxli3@ualr.edu4, I. Misan1, Enkeleda Dervishi, exdervishi@ualr.edu5, and Alexandru S. Biris, asbiris@ualr.edu4. (1) National Institute for Research and Development of Isotopic and Molecular Technologies, P.O. Box 700, R-400293, Cluj Napoca, R 3400, Romania, (2) IFW- Dresden, Helmholtzstrasse 20, Dresden, 01069, Germany, (3) Helsinki University of Technology, Espoo, 020400, Finland, (4) Applied Science Department, Nanotechnology Center, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR 72204, (5) Applied Science dept, Nanotechnology Center, University of Arkansas at Little Rock, 2801 S. University Ave, Little Rock, AR 72204
High quality double wall carbon nanotubes (DWCNTs) were synthesized by radiofrequency catalytic chemical vapor deposition from methane on a novel Fe-Mo/MgO catalyst obtained by co-precipitation. A thorough characterization of the nanotubes was done by electron microscopy (TEM), thermogravimetrical analysis and Raman spectroscopy. High Resolution TEM provided information regarding the morphological structure of the double wall carbon nanotubes, while Raman spectroscopy evidenced the existence of nanotubes with diameters between 2.42 to 0.72 nm and that the 2D band is composed of two peaks corresponding to the inner and outer nanotubes. A final purity of over 95 % was obtained by following a simple two-stage purification process. It was also found that RF escitation of the catalyst system considerably suppresses the formation of amorphous carbon and therefore leading to high quality DWCNT samples suitable for advanced applications.
 

PHYS Poster Session - Nanostructured Materials and Nanophotonics
7:30 PM-10:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster

Division of Physical Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008