A Plesiohedral Cellular Network of Graphene Bubbles for Ultralight, Strong, and Superelastic Materials

Advanced Materials
Seon Ju YeoPil J Yoo

Abstract

Advanced materials with low density and high strength impose transformative impacts in the construction, aerospace, and automobile industries. These materials can be realized by assembling well-designed modular building units (BUs) into interconnected structures. This study uses a hierarchical design strategy to demonstrate a new class of carbon-based, ultralight, strong, and even superelastic closed-cellular network structures. Here, the BUs are prepared by a multiscale design approach starting from the controlled synthesis of functionalized graphene oxide nanosheets at the molecular- and nanoscale, leading to the microfluidic fabrication of spherical solid-shelled bubbles at the microscale. Then, bubbles are strategically assembled into centimeter-scale 3D structures. Subsequently, these structures are transformed into self-interconnected and structurally reinforced closed-cellular network structures with plesiohedral cellular units through post-treatment, resulting in the generation of 3D graphene lattices with rhombic dodecahedral honeycomb structure at the centimeter-scale. The 3D graphene suprastructure concurrently exhibits the Young's modulus above 300 kPa while retaining a light density of 7.7 mg cm-3 and sustaining th...Continue Reading

References

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Citations

Jan 10, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Hyun Min JunPil J Yoo
Oct 2, 2021·ACS Applied Materials & Interfaces·Cinzia Di GiorgioFabrizio Bobba

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