In this study, we outline a novel strategy for the synthesis and characterization of single-walled carbon nanotubes (SWCNTs) functionalized with iron oxide nanoparticles (Fe3O4|Fe2O3|FeO). The fabrication process involves a two-step approach, first upconverting nanoparticles bonding SWCNTs onto a compatible substrate and then depositing Fe3O4 nanop