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. 2019 Oct 6;11(10):1618. doi: 10.3390/polym11101618

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Confocal laser scanning microscope (CLSM) images of polyacrylonitrile (PAN) nanofiber mats: (a) pure PAN (electrospun with 80 kV), (b) pure PAN (electrospun with 80 kV) after printing on the other side of the nanofiber mat, (c) carbonized PAN (electrospun with 50 kV), and (d) carbonized PAN (electrospun with 50 kV) after printing on the other side of the nanofiber mat.