The 3D ‘monoliths’ — grown between forming ice crystals — add elasticity to the super-strength and conductivity of graphene sheets.
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Bai, H., Li, C., Wang, X. & Shi, G. J. Phys. Chem. C 115, 5545–5551 (2011).
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Mitchell Crow, J. Graphene towers promise 'flexi-electronics'. Nature (2012). https://doi.org/10.1038/nature.2012.11930