Fig. 1From: Highlight selection of radiochemistry and radiopharmacy developments by editorial boardSchematic illustration of the preparation process of the pH-MNPs. (Reproduced from Liu Q, Fang H, Gai Y, Lan X. pH-Triggered Assembly of Natural Melanin Nanoparticles for Enhanced PET Imaging. Front Chem. 2020;8:755)Back to article page