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. 2018 Nov 12;16:89. doi: 10.1186/s12951-018-0416-4

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Morphology of a TPU, b TPU/DA, c TPU/NS1, d TPU/NS2.5 and e TPU/NS5 membranes. The insets indicate the magnification of the membranes’ surface. f Average diameter of nano-silver that formed on the surface of TPU/NS membranes. EDS spectra of g TPU/NS1, h TPU/NS2.5 and i TPU/NS5 membranes. j ATR-FITR spectra, k XRD spectra, and l water contact angles of as-prepared membranes