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Flash‑Induced High‑Throughput Porous Graphene via Synergistic Photo‑Effects for Electromagnetic Interference Shielding

查看全文 作　　者：Jin Soo [1]Lee;Jeong‑Wook [2]Kim;Jae Hee [1]Lee;Yong Koo [1]Son;Young Bin [1]Kim;Kyoohee [3]Woo;Chanhee [2]Lee;Il‑Doo [1]Kim;Jae Young [4]Seok;Jong Won [2]Yu;Jung Hwan [5]Park;Keon Jae [1]Lee 高影响力作者 机构地区：[1]Department of Materials Science and Engineering,Korea Advanced Institute of Science and Technology(KAIST),291 Daehak‑ro,Yuseong‑gu,Daejeon 34141,Republic of Korea;[2]School of Electrical Engineering,Korea Advanced Institute of Science and Technology(KAIST),291 Daehak‑ro,Yuseong‑gu,Daejeon 34141,Republic of Korea;[3]Department of Printed Electronics,Nano‑Convergence Manufacturing Systems Research Division,Korea Institute of Machinery and Materials(KIMM),156 Gajeongbuk‑Ro,Yuseong‑Gu,Daejeon 34103,Republic of Korea;[4]Department of Mechanical System Design Engineering,Seoul National University of Science and Technology,232 Gongneung‑ro,Nowon‑gu,Seoul 01811,Republic of Korea;[5]Department of Mechanical Engineering(Department of Aeronautics,Mechanical and Electronic Convergence Engineering),Kumoh National Institute of Technology,61 Daehak‑ro,Gumi,Gyeongbuk 39177,Republic of Korea高影响力机构 出　　处：《Nano-Micro Letters》索引2023年第15卷第11期,共18页高影响力期刊 基　　金：supported by the Technology Development Program of MSS (S3207363);supported by the Wearable Platform Materials Technology Center (WMC) (NRF-2022R1A5A6000846);National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT;Ministry of Science and ICT) (No. NRF-2020M3C1B8081519);supported by the MSIT, Korea, under the ITRC (Information Technology Research Center) support program (IITP-2020-0-01778);supervised by the IITP (Institute of Information & Communications Technology Planning & Evaluation). 摘　　要：Porous 2D materials with high conductivity and large surface area have been proposed for potential electromagnetic interference(EMI)shielding materials in future mobility and wearable applications to prevent signal noise,transmission inaccuracy,system malfunction,and health hazards.Here,we report on the synthesis of lightweight and flexible flash-induced porous graphene(FPG)with excellent EMI shielding performance.The broad spectrum of pulsed flashlight induces photo-chemical and photo-thermal reactions in polyimide films,forming 5×10 cm^(2)-size porous graphene with a hollow pillar structure in a few milliseconds.The resulting material demonstrated low density(0.0354 g cm^(−3))and outstanding absolute EMI shielding effectiveness of 1.12×10^(5) dB cm^(2) g^(−1).The FPG was characterized via thorough material analyses,and its mechanical durability and flexibility were confirmed by a bending cycle test.Finally,the FPG was utilized in drone and wearable applications,showing effective EMI shielding performance for internal/external EMI in a drone radar system and reducing the specific absorption rate in the human body. 关 键 词：Porous graphene Flash lamp Photo-pyrolysis HIGH-THROUGHPUT Electromagnetic interference shielding
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