An Ultralight Graphene Honeycomb Sandwich for Stretchable Light‐Emitting Displays |
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| Authors: | Zhenyu Wang Xu Liu Xi Shen Ne Myo Han Ying Wu Qingbin Zheng Jingjing Jia Ning Wang Jang‐Kyo Kim |
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| Affiliation: | 1. Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China;2. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, China;3. Department of Physics and the William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China |
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| Abstract: | Materials that can simultaneously achieve excellent electrical conductivity and stretchability are essential components for the next‐generation stretchable electronics. Herein, a highly conductive and stretchable graphene honeycomb (GHC) sandwich consisting of a porous GHC/polydimethylsiloxane (PDMS) composite core and ultrahigh‐density graphene foam/PDMS composite face sheets is rationally assembled. The GHCs prepared by a 3D printing technique possess a long‐range ordered hexagonal porous structure with an ultralow density of 3.25 mg cm?3 and deliver an excellent electrical conductivity of 72 S m?1. To the best of authors' knowledge, they are the lightest honeycomb structure reported in open literature. The highly porous GHC core endows the sandwich with an ultralow resistance change over large external strains of 60% with excellent structural durability. A stretchable light‐emitting display is demonstrated using the sandwich as the electric circuit and light‐emitting diodes as the pixels, which exhibits reliable lighting performance under different loading conditions. |
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| Keywords: | composites graphene honeycombs light‐emitting displays stretchable conductors ultralight sandwich structures |
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