Synthesis of carbon nanotubes via chemical vapor deposition by using rareearth metals as catalysts

This work presents the results of the synthesis of carbon nanotubes using the CVD method. Fe: MgO catalyst was used, also in combination with rare earth elements (gadolinium (Gd), dysprosium (Dy)), which when used alone, are not efficient as catalysts in nanotube growth. Synthesis was performed both at reduced pressure (10^-3 mbar) and atmospheric pressure, with constant parameters dependent on the process parameters.