Flash-Induced High-Throughput Porous Graphene via Synergistic Photo-Effects for Electromagnetic Interference Shieldingopen access
- Authors
- Lee, Jin Soo; Kim, Jeong-Wook; Lee, Jae Hee; Son, Yong Koo; Kim, Young Bin; Woo, Kyoohee; Lee, Chanhee; Kim, Il-Doo; Seok, Jae Young; Yu, Jong Won; Park, Jung Hwan; Lee, Keon Jae
- Issue Date
- Dec-2023
- Publisher
- SHANGHAI JIAO TONG UNIV PRESS
- Keywords
- Porous graphene; Flash lamp; Photo-pyrolysis; High-throughput; Electromagnetic interference shielding
- Citation
- NANO-MICRO LETTERS, v.15, no.1
- Journal Title
- NANO-MICRO LETTERS
- Volume
- 15
- Number
- 1
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26481
- DOI
- 10.1007/s40820-023-01157-8
- ISSN
- 2311-6706
2150-5551
- Abstract
- 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 x 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 x 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.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Department of Mechanical Design Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.