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. 2020 Dec 7;16(5):577–588. doi: 10.1016/j.ajps.2020.11.004

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© 2021 Published by Elsevier B.V. on behalf of Shenyang Pharmaceutical University.

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 4 — (A) Scanning electron microscopy (SEM) images of (a) bare Fe₃O₄ nanoparticles, (b, c) Fe₃O₄/graphene nanosheet composites, and the (d) SEM image attained from the Fe₃O₄/graphene nanosheet composite with corresponding electron dispersive X-ray spectroscopy (EDS) maps for Fe, O, and C. (B) (a-c) Transmission electron microscopy (TEM) and (d) high-resolution TEM (HRTEM) images of Fe₃O₄/graphene nanosheet composites. Inset is the selected-area electron diffraction (SAED) pattern of the composite. Reproduced from [82] with permission from American Chemical Society.