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. 2020 Aug 7;10(8):1546. doi: 10.3390/nano10081546

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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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(a) Digital image of the pure cellulose (left), cellulose/GO_3.5 (middle), and cellulose/GO_3.5/PANI (right) cut in a tree shape. (b) Digital photograph of the cellulose/GO_3.5/PANI under bending. Field emission scanning electron microscopes (FE-SEM); images of pristine cellulose sample (c–e), cellulose/GO_3.5 sample (f–h), and cellulose/GO_3.5/PANI sample (i–k) at different magnifications.