OICC Press International Journal of Nano Dimension 2228-5059 3 4 2024 03 01 Evaluation of catalyst ball-milling process on growth and diameter of carbon nanotubes on iron nanoparticles 10.7508/ijnd.2012.04.008 EN F. Taleshi Department of Applied Science, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran. Ali A. Hosseini Department of Physics, University of Mazandaran, Babolsar, 47416-95447, Iran. Journal Article 2024 03 01 In this study, we describe the growth of carbon nanotubes on commercial iron nanoparticles without carbon shell (Fe (nm), size 2O3 and Fe* (nm)/MgO) was carried out by mixing commercial Fe* nanoparticles (as catalyst) with Al2O3 and MgO powders (as supports)by using ball-milling method. The results show in spite of the fact that ball-milling process can have negative effects on diameter and morphology of synthesized CNTs at 925 ˚C, but it could increase the range of growth temperature from 865 ˚C to 975 ˚C.