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Anomalous elasticity and damping in covalently cross-linked graphene aerogels
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SYSNO ASEP 0553419 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Anomalous elasticity and damping in covalently cross-linked graphene aerogels Author(s) Šilhavík, Martin (FZU-D) ORCID
Kumar, Prabhat (FZU-D) ORCID
Zafar, Zahid Ali (FZU-D) ORCID
Míšek, Martin (FZU-D) RID, ORCID
Čičala, Martin (URE-Y)
Piliarik, Marek (URE-Y)
Červenka, Jiří (FZU-D) RID, ORCIDNumber of authors 7 Article number 27 Source Title COMMUNICATIONS PHYSICS. - : Nature Publishing Group - ISSN 2399-3650
Roč. 5, č. 1 (2022)Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords graphene aerogels ; superelasticity ; damping Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Subject RIV - cooperation Institute of Radio Engineering and Electronics - Optics, Masers, Lasers R&D Projects EF16_026/0008382 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA19-23986S GA ČR - Czech Science Foundation (CSF) LM2018096 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LL1602 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 ; URE-Y - RVO:67985882 UT WOS 000744995500001 EID SCOPUS 85123223200 DOI 10.1038/s42005-022-00806-5 Annotation Elasticity in materials is a phenomenon that provides a basis for widespread practical applications in engineering, medicine, and electronics. Most of the conventional materials can withstand only small deformations within the elastic limit, typically below 5% of their original size. Here, we report a graphene aerogel made of covalently cross-linked graphene sheets that exhibits anomalous superelastic behavior up to 92% of compressive and 68% tensile strain. We show that the graphene aerogel has a nonlinear stress-strain characteristic with the compressive and tensile yield strength of 4.5 GPa and 0.6 MPa, respectively. By considering the elastic bending of graphene sheets and buckle folding of pore walls, we develop a quantitative origami model that describes the stress-strain behavior of the aerogel. In addition, we analyze the mechanical oscillations of the graphene aerogel, observing superfast vibration damping within a time scale of 50–250 ns. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0330530
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