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. 2016 May 18;6:26332. doi: 10.1038/srep26332

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Copyright © 2016, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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FE-SEM images of electrospun PAN membrane (a,b), composite PAN membrane with non-porous MA-SiO₂ nanoparticles (c,d) and composite PAN membrane with mesoporous MA-SiO₂ nanoparticles (e,f) at two different magnifications.