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. 2020 Feb 27;12(3):512. doi: 10.3390/polym12030512

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© 2020 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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Scanning tunneling microscopy (STM) images and height profiles of methylcellulose-based polymer electrolyte (a) before H₂S treatment, (b) after H₂S treatment [87]. (Reprinted with permission from Abdullah et al., 2018.)