Nanomaterials for Electromagnetic Wave Shielding and Microwave Absorption

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: closed (20 October 2024) | Viewed by 2484

Special Issue Editors


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School of Materials Science and Engineering, Shandong University, Jinan 250061, China
Interests: flexible electronics; sensors; actuators; nanomaterials; nanocomposites
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Department of Mechanical Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong 999077, China
Interests: nanomaterials; nanomaterial assembly and functionalization; nanoprobe construction; multifunctional composite material

Special Issue Information

Dear Colleagues,

The vigorous development of modern technology has promoted the widespread use of electronic products, which has brought convenience to people's lives but has also caused serious electromagnetic pollution that has had an impact on human health and precision equipment. It is very important to develop high-performance electromagnetic protection materials. Electromagnetic interference (EMI) shielding and microwave-absorbing materials play significant roles in the fields of electromagnetic compatibility. Conventional metal-based EMI protection materials are limited due to having a high density, low flexibility, and poor tuning ability related to EMI shielding/absorbing performance, and thus it is urgent to design more high-performance EMI protection materials. Nanomaterials involving carbon materials such as carbon nanotubes, graphene, carbon fiber, etc.; metal materials such as magnetic metals, magnetic metal oxides, and their alloys; semiconductor materials; and transition-metal carbon/nitride (MXene) have been widely explored in the field of EMI shielding and microwave absorption due to their excellent electromagnetic properties and large specific surfaces. Researchers have mainly designed the electromagnetic function macro-structure from two perspectives, such as component composition and structural design. The preparation of integrated materials concerning structure and function is fascinating. In addition, electromagnetic simulation is increasingly applied to effectively guide material design and mechanism exploration. For this reason, in this Special Issue, we invite contributions from leading groups in the field that take a balanced look at current developments in this discipline.

Dr. Zhihui Zeng
Dr. Na Wu
Guest Editors

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Keywords

  • nanomaterials
  • EMI shielding
  • microwave absorption
  • composites
  • electronic

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Published Papers (2 papers)

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Research

12 pages, 3507 KiB  
Article
Ultrathin MWCNT/Ti3C2Tx Hybrid Films for Electromagnetic Interference Shielding
by Chuanxin Weng, Junzhe He, Jiangxiao Tian, Wei Wu, Jinjin Li, Jiulin Zhang, Haitao Yu, Xuechuan Zhang and Mingming Lu
Nanomaterials 2025, 15(1), 6; https://doi.org/10.3390/nano15010006 - 25 Dec 2024
Cited by 2 | Viewed by 482
Abstract
The disordered assembly and low conductivity of carbon nanotubes are the main problems that limit the application of electromagnetic interference (EMI) shielding. In this work, an ordered lamellar assembly structure of multiwalled carbon nanotube/Ti3C2Tx (MWCNT/Ti3C2 [...] Read more.
The disordered assembly and low conductivity of carbon nanotubes are the main problems that limit the application of electromagnetic interference (EMI) shielding. In this work, an ordered lamellar assembly structure of multiwalled carbon nanotube/Ti3C2Tx (MWCNT/Ti3C2Tx) hybrid films was achieved by vacuum-assisted filtration through the hybridization of Ti3C2Tx nanosheets and carbon nanotubes, where carbon nanotubes were tightly sticking on the surface of Ti3C2Tx nanosheets via physical adsorption and hydrogen bonding. Compared with the pure carbon nanotubes films, the hybrid MWCNT/Ti3C2Tx films achieved a significant improvement in conductivity of 452.5 S/cm and EMI shielding effectiveness (SE) of 44.3 dB under 50 wt% Ti3C2Tx with a low thickness (8.6 μm) and orderly lamellar stacking structure, which finally resulted in high specific SE (SSE/t, SE divided by the density and thickness) of 55,603.1 dB∙cm2∙g−1. Full article
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11 pages, 1726 KiB  
Article
A Hybrid Perovskite-Based Electromagnetic Wave Absorber with Enhanced Conduction Loss and Interfacial Polarization through Carbon Sphere Embedding
by Xuehua Lian, Yao Yao, Ziming Xiong, Yantao Duan, Jianbao Wang, Shangchen Fu, Yinsuo Dai, Wenke Zhou and Zhi Zhang
Nanomaterials 2024, 14(19), 1566; https://doi.org/10.3390/nano14191566 - 27 Sep 2024
Cited by 2 | Viewed by 1116
Abstract
Electronic equipment brings great convenience to daily life but also causes a lot of electromagnetic radiation pollution. Therefore, there is an urgent demand for electromagnetic wave-absorbing materials with a low thickness, wide bandwidth, and strong absorption. This work obtained a high-performance electromagnetic wave [...] Read more.
Electronic equipment brings great convenience to daily life but also causes a lot of electromagnetic radiation pollution. Therefore, there is an urgent demand for electromagnetic wave-absorbing materials with a low thickness, wide bandwidth, and strong absorption. This work obtained a high-performance electromagnetic wave absorption system by adding conductive carbon spheres (CSs) to the CH3NH3PbI3 (MAPbI3) absorber. In this system, MAPbI3, with strong dipole and relaxation polarization, acts dominant to the wave absorber. The carbon spheres provide a free electron transport channel between MAPbI3 lattices and constructs interfacial polarization loss in MAPbI3/CS. By regulating the content of CSs, we speculate that this increased effective absorption bandwidth and reflection loss intensity are attributed to the conductive channel of the carbon sphere and the interfacial polarization. As a result, when the mass ratio of the carbon sphere is 7.7%, the reflection loss intensity of MAPbI3/CS reaches −54 dB at 12 GHz, the corresponding effective absorption bandwidth is 4 GHz (10.24–14.24 GHz), and the absorber thickness is 2.96 mm. This work proves that enhancing conduction loss and interfacial polarization loss is an effective strategy for regulating the properties of dielectric loss-type absorbing materials. It also indicates that organic-inorganic hybrid perovskites have great potential in the field of electromagnetic wave absorption. Full article
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