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

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‐cel…