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  4. Nanomechanics of individual aerographite tetrapods
 
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Nanomechanics of individual aerographite tetrapods

Citation Link: https://doi.org/10.15480/882.1679
Publikationstyp
Journal Article
Date Issued
2017-04-12
Sprache
English
Author(s)
Meija, Raimonds  
Signetti, Stefano  
Schuchardt, Arnim  
Meurisch, Kerstin  
Smazna, Daria  
Mecklenburg, Matthias  
Schulte, Karl  
Erts, Donats  
Lupan, Oleg  
Fiedler, Bodo  orcid-logo
Mishra, Yogendra Kumar  
Adelung, Rainer  
Pugno, Nicola M.  
Institut
Keramische Hochleistungswerkstoffe M-9  
Kunststoffe und Verbundwerkstoffe M-11  
TORE-DOI
10.15480/882.1679
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1682
Journal
Nature communications  
Volume
8
Start Page
Art.-Nr. 14982-1
End Page
Art.-Nr. 14982-9
Citation
Nature communications (8): 14982- (2017-04-12)
Publisher DOI
10.1038/ncomms14982
Scopus ID
2-s2.0-85017421413
Publisher
Nature Publishing Group UK
Carbon-based three-dimensional aerographite networks, built from interconnected hollow tubular tetrapods of multilayer graphene, are ultra-lightweight materials recently discovered and ideal for advanced multifunctional applications. In order to predict the bulk mechanical behaviour of networks it is very important to understand the mechanics of their individual building blocks. Here we characterize the mechanical response of single aerographite tetrapods via in situ scanning electron and atomic force microscopy measurements. To understand the acquired results, which show that the overall behaviour of the tetrapod is governed by the buckling of the central joint, a mechanical nonlinear model was developed, introducing the concept of the buckling hinge. Finite element method simulations elucidate the governing buckling phenomena. The results are then generalized for tetrapods of different size-scales and shapes. These basic findings will permit better understanding of the mechanical response of the related networks and the design of similar aerogels based on graphene and other two-dimensional materials.
DDC Class
620: Ingenieurwissenschaften
Lizenz
https://creativecommons.org/licenses/by/4.0/
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