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A Plesiohedral Cellular Network of Graphene Bubbles for Ultralight, Strong, and Superelastic Materials
Author(s) -
Yeo Seon Ju,
Oh Min Jun,
Jun Hyun Min,
Lee Minhwan,
Bae Jung Gun,
Kim Yeseul,
Park Kyung Jin,
Lee Seungwoo,
Lee Daeyeon,
Weon Byung Mook,
Lee Won Bo,
Kwon Seok Joon,
Yoo Pil J.
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201802997
Subject(s) - materials science , graphene , microscale chemistry , nanotechnology , nanoscopic scale , fabrication , compressive strength , oxide , composite material , medicine , alternative medicine , mathematics , mathematics education , pathology , metallurgy
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 the elasticity against up to 87% of the compressive strain benefiting from efficient stress dissipation through the complete space‐filling closed‐cellular network. The method of fabricating the 3D graphene closed‐cellular structure opens a new pathway for designing lightweight, strong, and superelastic materials.