Fig. 1From: Ions doped melanin nanoparticle as a multiple imaging agentSchematic for the preparation of various ions chelating onto the melanin nanoparticle (iMNP, a), and surface modification with antibody and pegylation (b). Chelated Fe3+, Bi3+, and I+ ions were exhibited on the surface of iMNP by STEM (c)Back to article page