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. 2015 Jul 21;10:4639–4651. doi: 10.2147/IJN.S85999

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© 2015 Chen 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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SEM photographs of nanoparticles.

Notes: (A) Fe₃O₄-SF nanoparticles with an Fe₃O₄/SF ratio of 3:20; (B) MTX-Fe₃O₄-SF nanoparticles (drug load =20%).

Abbreviations: MTX, methotrexate; SEM, scanning electron microscope; SF, silk fibroin.