Fig. 2From: Sustainable synthesis of microwave-assisted IONPs using Spinacia oleracea L. for control of fungal wilt by modulating the defense system in tomato plantsStructural analysis by X-ray diffraction: XRD spectra of Fe3O4 NPs synthesized by using spinach leaves and Black coffee (BC) extract, subjected to various microwave powers (100–1000 W) with CuKα (1.5406 Å) radiations in the range of 2θ = 20–80º and an operating voltage of 40 kV at 15 mABack to article page