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. 2022 Aug 20;14:168. doi: 10.1007/s40820-022-00919-0

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Fabrication and microstructure of bioinspired graphene/aramid nanofiber film. a Illustration of the setup for sol–gel-film transformation. b Schematics of the microstructure evolution during sol–gel-film transformation. c Graphene-aramid nanofiber sol. d SEM image of graphene/aramid nanofiber hydrogel. e–f SEM images of graphene/aramid nanofiber film. g–h Raman spectra of graphene/aramid nanofiber film and comparison with graphene and ANF film. The characteristic peak located in 1610.8 cm⁻¹ presents C–C ring stretching vibrations of poly(p-phenylene terephthalamide) chains. i Continuous composite film with adjustable width