Fig. 7From: Engineering of bioactive metal sulfide nanomaterials for cancer therapy(Reprinted with permission from Ref. [69] Copyright 2020 Elsevier)Schematic illustration presenting the fabrication process of drug loaded urchin-like Bi2S3 hollow microspheres by isomorphic substitution approach (a). SEM (b) and TEM (c) image of Bi2S3 hollow microspheres Back to article page