Fig. 1

Water solubility of only PMIDA-cobalt oxide nanoparticles and FA-PMIDA-cobalt oxide nanoparticles (a); size determination of FA-PMIDA-cobalt oxide nanoparticles (b), DOX-FA-PMIDA-cobalt oxide nanoparticles (c), and MTX-FA-PMIDA-cobalt oxide nanoparticles (d) by dynamic light scattering. SEM images of PMIDA-coated cobalt oxide nanoparticles (e)