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. 2019 Apr 12;4:160–166. doi: 10.1016/j.bioactmat.2019.03.002

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© Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing,.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 1 — Characterization of the water-soluble Fe₃O₄ NPs. (A, B) TEM images of Fe₃O₄ NPs. (C) Pictures showing that Fe₃O₄ NPs could be attracted by the magnet.