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. 2021 Aug 2;146:100639. doi: 10.1016/j.mser.2021.100639

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Fig. 3 — FESEM image of (a) cross section of as-spun porous PS nanofibers (b) the porous PS nanofibers coated with hydrophilic coating (c) cross section of coated PS porous nanofiber. [42] Copyright 2014 American Chemical Society.