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. 2017 Oct 10;15:73. doi: 10.1186/s12951-017-0304-3

Fig. 1.

Fig. 1

Schematic 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)