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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Wiley Interdiscip Rev Nanomed Nanobiotechnol. 2015 Dec 22;8(4):619–630. doi: 10.1002/wnan.1386

Figure 4.

Figure 4

(A) A schematic illustration of chelator-free synthesis of *As (or 69Ge)-IONPPAA-PEG. (B) A TEM image of oleic acid capped IONPs. (C) A TEM image of PAA modified IONPs. (D) In vivo PET imaging of lymph nodes after the injection of *As-IONPPAA-PEG. (D) In vivo MR imaging of lymph nodes after the injection of *As-IONPPAA-PEG. Reprinted with permission from [67].