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Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks

Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic (EM) waves. Thus, directional electromagnetic interference (EMI) shielding materials (i.e., when the EM wave is incident from different sides of the s...

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Autores principales: Xue, Bai, Li, Yi, Cheng, Ziling, Yang, Shengdu, Xie, Lan, Qin, Shuhao, Zheng, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Nature Singapore 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8648885/
https://www.ncbi.nlm.nih.gov/pubmed/34870788
http://dx.doi.org/10.1007/s40820-021-00743-y
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author Xue, Bai
Li, Yi
Cheng, Ziling
Yang, Shengdu
Xie, Lan
Qin, Shuhao
Zheng, Qiang
author_facet Xue, Bai
Li, Yi
Cheng, Ziling
Yang, Shengdu
Xie, Lan
Qin, Shuhao
Zheng, Qiang
author_sort Xue, Bai
collection PubMed
description Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic (EM) waves. Thus, directional electromagnetic interference (EMI) shielding materials (i.e., when the EM wave is incident from different sides of the sample, the EMI shielding effectiveness (SE) is rather different) are strongly required; unfortunately, no comprehensive literature report is available on this research field. Herein, Ni-coated melamine foams (Ni@MF) were obtained by a facile electroless plating process, and multiwalled carbon nanotube (CNT) papers were prepared via a simple vacuum-assisted self-assembly approach. Then, step-wise asymmetric poly(butylene adipate-co-terephthalate) (PBAT) composites consisting of loose Ni@MF layer and compact CNT layer were successfully fabricated via a facile solution encapsulation approach. The step-wise asymmetric structures and electrical conductivity endow the Ni@MF/CNT/PBAT composites with unprecedented directional EMI shielding performances. When the EM wave is incident from Ni@MF layer or CNT layer, Ni@MF-5/CNT-75/PBAT exhibits the total EMI SE (SE(T)) of 38.3 and 29.5 dB, respectively, which illustrates the ΔSE(T) of 8.8 dB. This work opens a new research window for directional EMI shielding composites with step-wise asymmetric structures, which has promising applications in portable electronics and next-generation communication technologies. [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s40820-021-00743-y.
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spelling pubmed-86488852021-12-22 Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks Xue, Bai Li, Yi Cheng, Ziling Yang, Shengdu Xie, Lan Qin, Shuhao Zheng, Qiang Nanomicro Lett Article Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic (EM) waves. Thus, directional electromagnetic interference (EMI) shielding materials (i.e., when the EM wave is incident from different sides of the sample, the EMI shielding effectiveness (SE) is rather different) are strongly required; unfortunately, no comprehensive literature report is available on this research field. Herein, Ni-coated melamine foams (Ni@MF) were obtained by a facile electroless plating process, and multiwalled carbon nanotube (CNT) papers were prepared via a simple vacuum-assisted self-assembly approach. Then, step-wise asymmetric poly(butylene adipate-co-terephthalate) (PBAT) composites consisting of loose Ni@MF layer and compact CNT layer were successfully fabricated via a facile solution encapsulation approach. The step-wise asymmetric structures and electrical conductivity endow the Ni@MF/CNT/PBAT composites with unprecedented directional EMI shielding performances. When the EM wave is incident from Ni@MF layer or CNT layer, Ni@MF-5/CNT-75/PBAT exhibits the total EMI SE (SE(T)) of 38.3 and 29.5 dB, respectively, which illustrates the ΔSE(T) of 8.8 dB. This work opens a new research window for directional EMI shielding composites with step-wise asymmetric structures, which has promising applications in portable electronics and next-generation communication technologies. [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s40820-021-00743-y. Springer Nature Singapore 2021-12-06 /pmc/articles/PMC8648885/ /pubmed/34870788 http://dx.doi.org/10.1007/s40820-021-00743-y Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Xue, Bai
Li, Yi
Cheng, Ziling
Yang, Shengdu
Xie, Lan
Qin, Shuhao
Zheng, Qiang
Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks
title Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks
title_full Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks
title_fullStr Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks
title_full_unstemmed Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks
title_short Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks
title_sort directional electromagnetic interference shielding based on step-wise asymmetric conductive networks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8648885/
https://www.ncbi.nlm.nih.gov/pubmed/34870788
http://dx.doi.org/10.1007/s40820-021-00743-y
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