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. 2019 Nov 20;21(1):181–190. doi: 10.3892/mmr.2019.10834

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Copyright: © Yu et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 1. — Visualization of PEI-Fe₃O₄ NPs in complex with siRNA. Transmission electron microscopy images of (A) PEI-Fe₃O₄ NPs and (B) PEI-Fe₃O₄/siRNA complexes (Fe:siRNA weight ratio of 8:1). PEI-Fe3O4 NPs, polyethyleneimine-functionalized magnetic iron oxide nanoparticles; siRNA, small interfering RNA.