Flexible, Lightweight and Multi-Level Superimposed Titanium Carbide Films for Enhanced Electromagnetic Interference Shielding
The progressive development of next-generation flexible and portable electronics highly requires electromagnetic interference (EMI) shielding layers with a trade-off among high shielding effectiveness (SE), lightweight and flexible nature. Herein, a multiscale layered structure optimization strategy is proposed to enhance EMI shielding performance through orderly superimposing individual free-standing Ti 3 C 2 (F-Ti 3 C 2 ) film with an ultrathin thickness of ~ 4 μm. Compared to a bulk F-Ti 3 C 2 film (64.6 dB) with the same weight of 150 mg, the multi-level superimposed Ti 3 C 2 films with six individual layers (S-Ti 3 C 2 -6) show much higher EMI shielding performance (84.7 dB). Furthermore, the increment in the gap distance between the adjacent F-Ti 3 C 2 films can also increase the EMI SE from 51.1 dB (d = 0 mm) to 74.9 dB (d = 1.5 mm). The underlying mechanism can be attributed to the synergistic effect of multiple internal reflections between Ti 3 C 2 nanosheets and multiple-wave interference between adjacent F-Ti 3 C 2 films. Furthermore, the multi-layered design strategy can be extended to other EMI materials including polypyrrole and graphite, etc. The demonstration of Ti 3 C 2 coatings to block EM waves proves their considerable advantages over commercial shielding packages. This work provides a novel methodology to design EMI shielding layers for the practical applications
Year of publication: |
[2022]
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Authors: | Zhao, Qiang ; Zhao, Weiwei ; Xu, Haotian ; Zhao, Junde ; Zhu, Xianjun ; Lu, Yuyuan ; Ding, Chengbo ; He, Wenjun ; Bian, Jing ; Liu, Leilei ; Ma, Linfeng ; Wang, Weikang ; Zhou, Tongqing ; e, kirin ; Li, Jianmin ; Liu, Shujuan |
Publisher: |
[S.l.] : SSRN |
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