Abstract In this study, magnetic spinel copper ferrite (CuFe 2 O 4 ) nanostructures were eco-friendly synthesized using Nasturtium officinale extract. Physicochemical properties of these determined by transmission electron microscopy, field emission scanning microscopy (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometry, and energy dispersive mapping analysis. XRD patterns conform ...