THE EVOLUTION OF IRON AND NICKEL NITRATE FILMS DURING CVD SYNTHESIS OF CARBON NANOTUBES: AN IN-SITU HIGH TEMPERATURE X-RAY DIFFRACTION INVESTIGATION

Chemical vapor deposition (CVD) is a widely used technique to produce CNTs in large quantities.1 The decomposition of gases with carbon containing species (CO, CO2, C2H2 etc.) over a metallic catalyst at temperatures between 600°C and 1200°C leads to th