Fig. 7From: Manganese-based hollow nanoplatforms for MR imaging-guided cancer therapiesa Scheme of the synthesis process and therapeutic mechanism of Nano-donut/DOX nanoplatforms. Reproduced with permission from Ref. [141]. Copyright 2022, Elsevier Inc. b The schematic illustration of MCO NP synthesis and their application as GSH-responsive nanoscale DDSs. Reproduced with permission from Ref. [140]. Copyright 2019, The Royal Society of ChemistryBack to article page