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. 2015 Jul 2;10:4279–4291. doi: 10.2147/IJN.S85095

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© 2015 Li et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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STEM and HAADF-STEM-EDS mapping images of Fe₃O₄@SiO₂ nanoparticles O, Si, and Fe.

Notes: (A) STEM of Fe₃O₄@SiO₂ nanoparticles (inset: higher-magnification image of STEM). (B–D) HAADF-STEM-EDS mapping images of Fe₃O₄@SiO₂ revealing the O, Si, and Fe.

Abbreviations: STEM, scanning transmission electron microscope; HAADF-STEM-EDS, high-angle annular dark field scanning transmission electron microscopy–energy-dispersive X-ray spectrometry; O, oxygen; Si, silica; Fe, iron.