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. 2019 Oct 24;14:8421–8432. doi: 10.2147/IJN.S218488

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© 2019 Mühlberger et al.

This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (https://www.dovepress.com/terms.php).

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SEM picture of SPION^Citrate. The picture of freeze-dried SPION^Citrate was taken with a Zeiss Auriga SEM (Carl Zeiss, Oberkochen, Germany) with an acceleration voltage of 1.5 kV.

Abbreviations: SPION, superparamagnetic iron oxide nanoparticle; SEM, scanning electron microscope.