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Shao R, Wang G, Chai J, Wang G, Zhao G. Flexible, Reliable, and Lightweight Multiwalled Carbon Nanotube/Polytetrafluoroethylene Membranes with Dual-Nanofibrous Structure for Outstanding EMI Shielding and Multifunctional Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308992. [PMID: 38174631 DOI: 10.1002/smll.202308992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/25/2023] [Indexed: 01/05/2024]
Abstract
In this study, lightweight, flexible, and environmentally robust dual-nanofibrous membranes made of carbon nanotube (CNT) and polytetrafluoroethylene (PTFE) are fabricated using a novel shear-induced in situ fibrillation method for electromagnetic interference (EMI) shielding. The unique spiderweb-like network, constructed from fine CNTs and PTFE fibrils, integrates the inherent characteristics of these two materials to achieve high conductivity, superhydrophobicity, and extraordinary chemical resistance. The dual-nanofibrous membranes demonstrate a high EMI shielding effectiveness (SE) of 25.7-42.2 dB at a thickness range of 100-520 µm and the normalized surface-specific SE can reach up to 9931.1 dB·cm2·g-1, while maintaining reliability even under extremely harsh conditions. In addition, distinct electrothermal and photothermal conversion properties can be achieved easily. Under the stimulation of a modest electrical voltage (5 V) and light power density (400 mW·cm-2), the surface temperatures of the CNT/PTFE membranes can reach up to 135.1 and 147.8 °C, respectively. Moreover, the CNT/PTFE membranes exhibit swift, stable, and highly efficient thermal conversion capabilities, endowing them with self-heating and de-icing performance. These versatile, flexible, and breathable membranes, coupled with their efficient and facile fabrication process, showcase tremendous application potential in aerospace, the Internet of Things, and the fabrication of wearable electronic equipment for extreme environments.
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Affiliation(s)
- Runze Shao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, China
| | - Guilong Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, China
| | - Jialong Chai
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, China
| | - Guizhen Wang
- Key Laboratory of Chinese Education Ministry for Tropical Biological Resources, Hainan University, Haikou, Hainan, 570228, China
| | - Guoqun Zhao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, China
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2
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Guo Z, Chen J, Chu S, Zhou W, Xie J. Microstructure regulation and microwave absorption properties of ZnO/RGO composites. Phys Chem Chem Phys 2024; 26:11968-11979. [PMID: 38573242 DOI: 10.1039/d3cp06282a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Electromagnetic waves can cause different degrees of damage to the human body. People are developing unique nanomaterials with excellent reflection loss (RL), thin thickness, wide frequency band and light weight to improve the absorption efficiency of electromagnetic waves. Using a hydrothermal method, ZnO nanocrystals are combined with graphene oxide (GO). After heat treatment, evenly dispersed ZnO nanocrystals are attached to the GO surface or inserted into the lamellae, and the amount of Zn(CH3COO)2·2H2O and GO is selected to obtain ZnO/RGO nanocomposites with different mass ratios (1 : 1, 1 : 2, 1 : 3). The ZnO/RGO nanocomposites were mixed with paraffin wax with different mass ratios (15, 20, 25, 30 wt%) to explore their electromagnetic parameters and wave absorption properties. It is found that at 25 wt%, ZnO : GO = 3 : 1 and thickness of 3 mm, the sample exhibits excellent wave absorption performance (-36.6 dB) and wide effective absorption bandwidth (6.6 GHz). The microwave absorption performance is enhanced because ZnO nanocrystals inhibit RGO agglomeration and improve impedance matching between the heterostructure interface and RGO.
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Affiliation(s)
- Zhifeng Guo
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Jin Chen
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Suihong Chu
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Wenwen Zhou
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
| | - Jiaqiang Xie
- School of Materials Science and Engineering, Xi 'an University of Science and Technology, Xi 'an 710054, China.
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Liu TT, Zheng Q, Cao WQ, Wang YZ, Zhang M, Zhao QL, Cao MS. In Situ Atomic Reconstruction Engineering Modulating Graphene-Like MXene-Based Multifunctional Electromagnetic Devices Covering Multi-Spectrum. NANO-MICRO LETTERS 2024; 16:173. [PMID: 38619642 PMCID: PMC11018580 DOI: 10.1007/s40820-024-01391-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/13/2024] [Indexed: 04/16/2024]
Abstract
With the diversified development of big data, detection and precision guidance technologies, electromagnetic (EM) functional materials and devices serving multiple spectrums have become a hot topic. Exploring the multispectral response of materials is a challenging and meaningful scientific question. In this study, MXene/TiO2 hybrids with tunable conduction loss and polarization relaxation are fabricated by in situ atomic reconstruction engineering. More importantly, MXene/TiO2 hybrids exhibit adjustable spectral responses in the GHz, infrared and visible spectrums, and several EM devices are constructed based on this. An antenna array provides excellent EM energy harvesting in multiple microwave bands, with |S11| up to - 63.2 dB, and can be tuned by the degree of bending. An ultra-wideband bandpass filter realizes a passband of about 5.4 GHz and effectively suppresses the transmission of EM signals in the stopband. An infrared stealth device has an emissivity of less than 0.2 in the infrared spectrum at wavelengths of 6-14 µm. This work can provide new inspiration for the design and development of multifunctional, multi-spectrum EM devices.
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Affiliation(s)
- Ting-Ting Liu
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China
| | - Qi Zheng
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China
| | - Wen-Qiang Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China
| | - Yu-Ze Wang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China
| | - Min Zhang
- Department of Physics, Beijing Technology and Business University, Beijing, 100048, People's Republic of China
| | - Quan-Liang Zhao
- School of Mechanical and Materials Engineering, North China University of Technology, Beijing, 100144, People's Republic of China
| | - Mao-Sheng Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.
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4
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Cai L, Jiang H, Pan F, Liang H, Shi Y, Wang X, Cheng J, Yang Y, Zhang X, Shi Z, Wu H, Lu W. Linkage Effect Induced by Hierarchical Architecture in Magnetic MXene-based Microwave Absorber. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306698. [PMID: 37840390 DOI: 10.1002/smll.202306698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/25/2023] [Indexed: 10/17/2023]
Abstract
Hierarchical architecture engineering is desirable in integrating the physical-chemical behaviors and macroscopic properties of materials, which present great potential for developing multifunctional microwave absorption materials. However, the intrinsic mechanisms and correlation conditions among cellular units have not been revealed, which are insufficient to maximize the fusion of superior microwave absorption (MA) and derived multifunctionality. Herein, based on three models (disordered structure, porous structure, lamellar structure) of structural units, a range of MXene-aerogels with variable constructions are fabricated by a top-down ice template method. The aerogel with lamellar structure with a density of only 0.015 g cm-3 exhibits the best MA performance (minimum reflection loss: -53.87 dB, effective absorption bandwidth:6.84 GHz) at a 6 wt.% filling ratio, which is preferred over alternative aerogels with variable configurations. This work elucidates the relationship between the hierarchical architecture and the superior MA performance. Further, the MXene/CoNi Composite aerogel with lamellar structure exhibits >90% compression stretch after 1000 cycles, excellent compressive properties, and elasticity, as well as high hydrophobicity and thermal insulation properties, broadening the versatility of MXene-based aerogel applications. In short, through precise microstructure design, this work provides a conceptually novel strategy to realize the integration of electromagnetic stealth, thermal insulation, and load-bearing capability simultaneously.
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Affiliation(s)
- Lei Cai
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Haojie Jiang
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Fei Pan
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Hongsheng Liang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Yuyang Shi
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Xiao Wang
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Jie Cheng
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Yang Yang
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Xiang Zhang
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Zhong Shi
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 201804, P. R. China
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Wei Lu
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China
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Iravani S, Rabiee N, Makvandi P. Advancements in MXene-based composites for electronic skins. J Mater Chem B 2024; 12:895-915. [PMID: 38194290 DOI: 10.1039/d3tb02247a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
MXenes are a class of two-dimensional (2D) materials that have gained significant attention in the field of electronic skins (E-skins). MXene-based composites offer several advantages for E-skins, including high electrical conductivity, mechanical flexibility, transparency, and chemical stability. Their mechanical flexibility allows for conformal integration onto various surfaces, enabling the creation of E-skins that can closely mimic human skin. In addition, their high surface area facilitates enhanced sensitivity and responsiveness to external stimuli, making them ideal for sensing applications. Notably, MXene-based composites can be integrated into E-skins to create sensors that can detect various stimuli, such as temperature, pressure, strain, and humidity. These sensors can be used for a wide range of applications, including health monitoring, robotics, and human-machine interfaces. However, challenges related to scalability, integration, and biocompatibility need to be addressed. One important challenge is achieving long-term stability under harsh conditions such as high humidity. MXenes are susceptible to oxidation, which can degrade their electrical and mechanical properties over time. Another crucial challenge is the scalability of MXene synthesis, as large-scale production methods need to be developed to meet the demand for commercial applications. Notably, the integration of MXenes with other components, such as energy storage devices or flexible electronics, requires further developments to ensure compatibility and optimize overall performance. By addressing issues related to material stability, mechanical flexibility, scalability, sensing performance, and power supply, MXene-based E-skins can develop the fields of healthcare monitoring/diagnostics, prosthetics, motion monitoring, wearable electronics, and human-robot interactions. The integration of MXenes with emerging technologies, such as artificial intelligence or internet of things, can unlock new functionalities and applications for E-skins, ranging from healthcare monitoring to virtual reality interfaces. This review aims to examine the challenges, advantages, and limitations of MXenes and their composites in E-skins, while also exploring the future prospects and potential advancements in this field.
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Affiliation(s)
- Siavash Iravani
- Independent Researcher, W Nazar ST, Boostan Ave, Isfahan, Iran.
| | - Navid Rabiee
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, WA 6150, Australia
- School of Engineering, Macquarie University, Sydney, New South Wales, 2109, Australia
| | - Pooyan Makvandi
- The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, 324000, Quzhou, Zhejiang, China.
- School of Engineering, Institute for Bioengineering, The University of Edinburgh, Edinburgh, EH9 3JL, UK
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6
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Xi Y, Ji X, Kong F, Li T, Zhang B. Production of Lignin-Derived Functional Material for Efficient Electromagnetic Wave Absorption with an Ultralow Filler Ratio. Polymers (Basel) 2024; 16:201. [PMID: 38257000 PMCID: PMC10819316 DOI: 10.3390/polym16020201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/24/2024] Open
Abstract
Industrial lignin, a by-product of pulping for papermaking fibers or of second-generation ethanol production, is primarily served as a low-grade combustible energy source. The fabrication of high-value-added functional materials with industrial lignin is still a challenge. Herein, a three-dimensional hierarchical lignin-derived porous carbon (HLPC) was prepared with lignosulfonate as the carbon source and MgCO3 as the template. The uniform mixing of precursor and template agent resulted in the construction of a three-dimensional hierarchical porous structure. HLPC presented excellent electromagnetic wave (EMW) absorption performance. With a low filler content of 7 wt%, HLPC showed a minimum reflection loss (RL) value of -41.8 dB (1.7 mm, 13.8 GHz), and a maximum effective absorption bandwidth (EAB) of 4.53 GHz (1.6 mm). In addition, the enhancement mechanism of HLPC for EMW absorption was also explored through comparing the morphology and electromagnetic parameters of lignin-derived carbon (LC) and lignin-derived porous carbon (LPC). The three-dimensional hierarchical porous structure endowed the carbon with a high pore volume, resulting in an abundant gas-solid interface between air and carbon for interfacial polarization. This structure also provided conductive networks for conduction loss. This work offers a strategy to synthesize biomass-based carbon for high-performance EMW absorption.
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Affiliation(s)
- Yuebin Xi
- Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Xingxiang Ji
- Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Fangong Kong
- Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Tianjin Li
- Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
- Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Binpeng Zhang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China
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7
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Xu X, Xing Y, Liu L. Construction of MoS 2-ReS 2 Hybrid on Ti 3C 2T x MXene for Enhanced Microwave Absorption. MICROMACHINES 2023; 14:1996. [PMID: 38004853 PMCID: PMC10673285 DOI: 10.3390/mi14111996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/26/2023]
Abstract
Utilizing interface engineering to construct abundant heterogeneous interfaces is an important means to improve the absorbing performance of microwave absorbers. Here, we have prepared the MXene/MoS2-ReS2 (MMR) composite with rich heterogeneous interfaces composed of two-dimensional Ti3C2Tx MXene and two-dimensional transition metal disulfides through a facile hydrothermal process. The surface of MXene is completely covered by nanosheets of MoS2 and ReS2, forming a hybrid structure. MRR exhibits excellent absorption performance, with its strongest reflection loss reaching -51.15 dB at 2.0 mm when the filling ratio is only 10 wt%. Meanwhile, the effective absorption bandwidth covers the range of 5.5-18 GHz. Compared to MXene/MoS2 composites, MRR with a MoS2-ReS2 heterogeneous interface exhibits stronger polarization loss ability and superior absorption efficiency at the same thickness. This study provides a reference for the design of transition metal disulfides-based absorbing materials.
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Affiliation(s)
- Xiaoxuan Xu
- School of Business and Trade, Nanjing Vocational University of Industry Technology, Nanjing 210023, China;
| | - Youqiang Xing
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Lei Liu
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, China
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Zhang Q, Wang Q, Cui J, Zhao S, Zhang G, Gao A, Yan Y. Structural design and preparation of Ti 3C 2T x MXene/polymer composites for absorption-dominated electromagnetic interference shielding. NANOSCALE ADVANCES 2023; 5:3549-3574. [PMID: 37441247 PMCID: PMC10334419 DOI: 10.1039/d3na00130j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/23/2023] [Indexed: 07/15/2023]
Abstract
Electromagnetic interference (EMI) is a pervasive and harmful phenomenon in modern society that affects the functionality and reliability of electronic devices and poses a threat to human health. To address this issue, EMI-shielding materials with high absorption performance have attracted considerable attention. Among various candidates, two-dimensional MXenes are promising materials for EMI shielding due to their high conductivity and tunable surface chemistry. Moreover, by incorporating magnetic and conductive fillers into MXene/polymer composites, the EMI shielding performance can be further improved through structural design and impedance matching. Herein, we provide a comprehensive review of the recent progress in MXene/polymer composites for absorption-dominated EMI shielding applications. We summarize the fabrication methods and EMI shielding mechanisms of different composite structures, such as homogeneous, multilayer, segregated, porous, and hybrid structures. We also analyze the advantages and disadvantages of these structures in terms of EMI shielding effectiveness and the absorption ratio. Furthermore, we discuss the roles of magnetic and conductive fillers in modulating the electrical properties and EMI shielding performance of the composites. We also introduce the methods for evaluating the EMI shielding performance of the materials and emphasize the electromagnetic parameters and challenges. Finally, we provide insights and suggestions for the future development of MXene/polymer composites for EMI shielding applications.
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Affiliation(s)
- Qimei Zhang
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
- School of Materials and Environmental Engineering, Chizhou University Chizhou 247000 China
| | - Qi Wang
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
| | - Jian Cui
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
| | - Shuai Zhao
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
| | - Guangfa Zhang
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
| | - Ailin Gao
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
| | - Yehai Yan
- Key Lab of Rubber-Plastics, Ministry of Education, Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology Qingdao 266042 China
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9
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Qing G, Li Y, Zhou W, Xu H, Hu F, Zhou X. In Situ Grown 1D/2D Structure of Dy 3Si 2C 2 on SiC w for Enhanced Electromagnetic Wave Absorption. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093455. [PMID: 37176335 PMCID: PMC10179909 DOI: 10.3390/ma16093455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
To improve electromagnetic wave (EMW) absorption performance, a novel nano-laminated Dy3Si2C2 coating was successfully in situ coated on the surface of SiC whisker (SiCw/Dy3Si2C2) using a molten salt approach. A labyrinthine three-dimensional (3D) net was constructed by the one-dimensional (1D) SiCw coated with the two-dimensional (2D) Dy3Si2C2 layer with a thickness of ~100 nm, which significantly improved the EMW absorption properties of SiCw. Compared to pure SiCw with the minimum reflection loss (RLmin) value of -10.64 dB and the effective absorption bandwidth (EAB) of 1.04 GHz for the sample with a thickness of 4.5 mm, SiCw/Dy3Si2C2 showed a significantly better EMW absorption performance with RLmin of -32.09 dB and wider EAB of 3.76 GHz for thinner samples with a thickness of 1.76 mm. The enhancement of the EMW absorption performance could be ascribed to the improvement of impedance matching, enhanced conductance loss, interfacial polarization as well as multiple scattering. The SiCw/Dy3Si2C2 can be a candidate for EMW absorber applications due to its excellent EMW absorption performance and wide EAB for relatively thin samples, light weight, as well as potential oxidation and corrosion resistance at high temperatures.
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Affiliation(s)
- Gang Qing
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Yang Li
- National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha 410083, China
| | - Wei Zhou
- Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
| | - Huidong Xu
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Fang Hu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Xiaobing Zhou
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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10
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Song R, Mao B, Wang Z, Hui Y, Zhang N, Fang R, Zhang J, Wu Y, Ge Q, Novoselov KS, He D. Comparison of copper and graphene-assembled films in 5G wireless communication and THz electromagnetic-interference shielding. Proc Natl Acad Sci U S A 2023; 120:e2209807120. [PMID: 36812210 PMCID: PMC9992768 DOI: 10.1073/pnas.2209807120] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/28/2022] [Indexed: 02/24/2023] Open
Abstract
Since first developed, the conducting materials in wireless communication and electromagnetic interference (EMI) shielding devices have been primarily made of metal-based structures. Here, we present a graphene-assembled film (GAF) that can be used to replace copper in such practical electronics. The GAF-based antennas present strong anticorrosive behavior. The GAF ultra-wideband antenna covers the frequency range of 3.7 GHz to 67 GHz with the bandwidth (BW) of 63.3 GHz, which exceed ~110% than the copper foil-based antenna. The GAF Fifth Generation (5G) antenna array features a wider BW and lower sidelobe level compared with that of copper antennas. EMI shielding effectiveness (SE) of GAF also outperforms copper, reaching up to 127 dB in the frequency range of 2.6 GHz to 0.32 THz, with a SE per unit thickness of 6,966 dB/mm. We also confirm that GAF metamaterials exhibit promising frequency selection characteristics and angular stability as flexible frequency selective surfaces.
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Affiliation(s)
- Rongguo Song
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
| | - Boyang Mao
- National Graphene Institute, University of Manchester, ManchesterM13 9PL, UK
- Chongqing Two-Dimensional (2D) Materials Institute, Chongqing400714, China
| | - Zhe Wang
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan430070, China
| | - Yueyue Hui
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
| | - Ning Zhang
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
| | - Ran Fang
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
| | - Jingwei Zhang
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
| | - Yuen Wu
- School of Chemistry and Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), the Chinese Academy of Sciences (CAS) Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei230026, China
| | - Qi Ge
- Chongqing Two-Dimensional (2D) Materials Institute, Chongqing400714, China
| | - Kostya S. Novoselov
- National Graphene Institute, University of Manchester, ManchesterM13 9PL, UK
- Chongqing Two-Dimensional (2D) Materials Institute, Chongqing400714, China
- Department of Materials Science and Engineering, National University of Singapore, Singapore117575, Singapore
- Centre for Advanced Two-Dimensional (2D) Materials, National University of Singapore, Singapore117546, Singapore
| | - Daping He
- Hubei Engineering Research Center of Radio-Frequency (RF)-Microwave Technology and Application, Wuhan University of Technology, Wuhan430070, China
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan430070, China
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11
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Sun W, Lou Z, Xu L, Ma Q, Han H, Chen M, Wang Q, Han J, Li Y. Bioinspired Carbon Superstructures for Efficient Electromagnetic Shielding. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4358-4370. [PMID: 36622958 DOI: 10.1021/acsami.2c21622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Biologically inspired superstructural materials exhibit wide application prospects in many fields, in terms of mitigating increasingly serious electromagnetic (EM) pollution in the civil field. Here, we successfully obtain bamboo slices with uniform pore size distribution through the advanced bamboo transverse splitting technology developed by our group previously and prepare large-scale honeycomb-like carbon-based tubular array (CTA) structures with a controllable pore size, graphitization degree, and selectable conductivity property. Based on the simulation and experimental results, the EM shielding performance of CTAs is proven to be sensitive to the microchannel aperture size and the EM energy incident angle, which is attributed to the difference in the propagation rate of induced electrons in different directions. Among the candidates, CTA-middle-1500 exhibits the best shielding performance against incident EM energy with average SE/ρ values of 123.7 and 144.5 dB cm3 g-1 for perpendicular and parallel directions, respectively, showing its application potential as a lightweight and efficient EM shielding material. The predicted optimal incident angle for CTA-middle-1500 against EM energy radiation is 15°, with the largest RCS reduction value of 26.1 dB m2. The excellent EM shielding performance is attributed to the good reflection capacity involved with the high conductivities of the CTAs.
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Affiliation(s)
- Wei Sun
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
| | - Zhichao Lou
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
| | - Lei Xu
- Institute of Agricultural Facilities and Equipment, Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu210014, People's Republic of China
| | - Qianli Ma
- International Center of Bamboo and Rattan, Beijing100102, People's Republic of China
| | - He Han
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
| | - Meiling Chen
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
| | - Qiuyi Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
| | - Jingquan Han
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
| | - Yanjun Li
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, People's Republic of China
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12
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Zhang Q, Cui J, Zhao S, Zhang G, Gao A, Yan Y. Development of Electromagnetic-Wave-Shielding Polyvinylidene Fluoride-Ti 3C 2T x MXene-Carbon Nanotube Composites by Improving Impedance Matching and Conductivity. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:417. [PMID: 36770378 PMCID: PMC9921545 DOI: 10.3390/nano13030417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/07/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Absorption-dominated electromagnetic interference (EMI) shielding is attained by improving impedance matching and conductivity through structural design. Polyvinylidene fluoride (PVDF)-Ti3C2Tx MXene-single-walled carbon nanotubes (SWCNTs) composites with layered heterogeneous conductive fillers and segregated structures were prepared through electrostatic flocculation and hot pressing of the PVDF composite microsphere-coated MXene and SWCNTs in a layer-by-layer fashion. Results suggest that the heterogeneous fillers improve impedance matching and layered coating, and hot compression allows the MXene and SWCNTs to form a continuous conducting network at the PVDF interface, thereby conferring excellent conductivity to the composite. The PVDF-MXene-SWCNTs composite showed a conductivity of 2.75 S cm-1 at 2.5% MXene and 1% SWCNTs. The EMI shielding efficiency (SE) and contribution from absorption loss to the total EMI SE of PVDF-MXene-SWCNTs were 46.1 dB and 85.7%, respectively. Furthermore, the PVDF-MXene-SWCNTs composite exhibited excellent dielectric losses and impedance matching. Therefore, the layered heteroconductive fillers in a segregated structure optimize impedance matching, provide excellent conductivity, and improve absorption-dominated electromagnetic shielding.
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Affiliation(s)
- Qimei Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- School of Materials and Environmental Engineering, Chizhou University, Chizhou 247000, China
| | - Jian Cui
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shuai Zhao
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Guangfa Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ailin Gao
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yehai Yan
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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13
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Liu Y, Wu N, Zheng S, Yang Y, Li B, Liu W, Liu J, Zeng Z. From MXene Trash to Ultraflexible Composites for Multifunctional Electromagnetic Interference Shielding. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50120-50128. [PMID: 36300842 DOI: 10.1021/acsami.2c13849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The development of flexible composites based on the transition metal carbides/nitrides (MXenes) is gaining popularity because of MXenes' high application potentials for electromagnetic interference (EMI) shields. Here, we prepare a new type of ultraflexible composite films composed of "trashed" MXene sediment (MS) and waterborne polyurethane using a simple, facile solution casting approach. In addition to the outstanding mechanical strength and electrical conductivity, an extremely wide-range of MS contents can be achieved for the composites, resulting in EMI shielding effectiveness (SE) that may be controlled over a wide range. The X-band EMI SE of the flexible, low-density composites containing 70 wt % MS reaches 45.3 dB at a thickness of merely 0.51 mm. Moreover, the SE values of more than 34.5 dB in the ultrabroadband gigahertz frequency range including X-band, P-band, K-band, and R-band, are accomplished for the thin composites. Furthermore, the MS/WPU composite films show excellent electrothermal and photothermal performance, demonstrating the multifunctionalities of the MS-based EMI shields. Combined with the cost-efficient, sustainable, and scalable preparation approach, the ultraflexible, multifunctional composites from "trashed MXene" show great potentials for next-generation electronics. This work also opens a new avenue for the creation of innovative, high-performance, multifunctional flexible composites.
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Affiliation(s)
- Yue Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, School of Materials Science and Engineering, Shandong University, Jinan250061, P.R. China
| | - Na Wu
- Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093Zurich, Switzerland
| | - Sinan Zheng
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, School of Materials Science and Engineering, Shandong University, Jinan250061, P.R. China
| | - Yunfei Yang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, School of Materials Science and Engineering, Shandong University, Jinan250061, P.R. China
| | - Bin Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, School of Materials Science and Engineering, Shandong University, Jinan250061, P.R. China
| | - Wei Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong250100, China
- Shenzhen Research Institute of Shandong University, Shenzhen518057, China
| | - Jiurong Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, School of Materials Science and Engineering, Shandong University, Jinan250061, P.R. China
| | - Zhihui Zeng
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, School of Materials Science and Engineering, Shandong University, Jinan250061, P.R. China
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14
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Chang P, Mei H, Zhao Y, Pan L, Zhang M, Wang X, Cheng L, Zhang L. Nature-Inspired 3D Spiral Grass Structured Graphene Quantum Dots/MXene Nanohybrids with Exceptional Photothermal-Driven Pseudo-Capacitance Improvement. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2204086. [PMID: 36026560 PMCID: PMC9596846 DOI: 10.1002/advs.202204086] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Indexed: 05/31/2023]
Abstract
Solar-thermal conversion is considered as a green and simple means to improve the performance of energy storage materials, but often limited by the intrinsic photothermal properties of materials and crude structure design. Herein, inspired by the unique light trapping effect of wide leaf spiral grass during photosynthesis, a biomimetic structural photothermal energy storage system is developed, to further promote the solar thermal-driven pseudo capacitance improvement. In this system, three-dimensional printed tortional Kelvin cell arrays structure with interesting light trapping property functions as "spiral leaf blades" to improve the efficiency of light absorption, while graphene quantum dots/MXene nanohybrids with wide photothermal response range and strong electrochemical activity serve as "chloroplast" for photothermal conversion and energy storage. As expected, the biomimetic structure-enhanced photothermal supercapacitor achieves an ideal solar thermal-driven pseudo capacitance enhancement (up to 304%), an ultrahigh areal capacitance of 10.47 F cm-2 , remarkable photothermal response (surface temperature change of 50.1 °C), excellent energy density (1.18 mWh cm-2 ) and cycling stability (10000 cycles). This work not only offers a novel enhancement strategy for photothermal applications, but also inspires new structure designs for multifunctional energy storage and conversion devices.
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Affiliation(s)
- Peng Chang
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Hui Mei
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Yu Zhao
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Longkai Pan
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Minggang Zhang
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Xiao Wang
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Laifei Cheng
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
| | - Litong Zhang
- Science and Technology on Thermostructural Composite Materials LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China
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15
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Yahya Alkhalaf H, Yazed Ahmad M, Ramiah H. Self-Sustainable Biomedical Devices Powered by RF Energy: A Review. SENSORS (BASEL, SWITZERLAND) 2022; 22:6371. [PMID: 36080825 PMCID: PMC9459858 DOI: 10.3390/s22176371] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
Wearable and implantable medical devices (IMDs) have come a long way in the past few decades and have contributed to the development of many personalized health monitoring and therapeutic applications. Sustaining these devices with reliable and long-term power supply is still an ongoing challenge. This review discusses the challenges and milestones in energizing wearable and IMDs using the RF energy harvesting (RFEH) technique. The review highlights the main integrating frontend blocks such as the wearable and implantable antenna design, matching network, and rectifier topologies. The advantages and bottlenecks of adopting RFEH technology in wearable and IMDs are reviewed, along with the system elements and characteristics that enable these devices to operate in an optimized manner. The applications of RFEH in wearable and IMDs medical devices are elaborated in the final section of this review. This article summarizes the recent developments in RFEH, highlights the gaps, and explores future research opportunities.
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Affiliation(s)
| | - Mohd Yazed Ahmad
- Department of Biomedical Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Harikrishnan Ramiah
- Department of Electrical Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
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16
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Kozak A, Hofbauerová M, Halahovets Y, Pribusová-Slušná L, Precner M, Mičušík M, Orovčík L, Hulman M, Stepura A, Omastová M, Šiffalovič P, Ťapajna M. Nanofriction Properties of Mono- and Double-Layer Ti 3C 2T x MXenes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:36815-36824. [PMID: 35921624 DOI: 10.1021/acsami.2c08963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Unique structure and ability to control the surface termination groups of MXenes make these materials extremely promising for solid lubrication applications. Due to the challenging delamination process, the tribological properties of two-dimensional MXenes particles have been mostly investigated as additive components in the solvents working in the macrosystem, while the understanding of the nanotribological properties of mono- and few-layer MXenes is still limited. Here, we investigate the nanotribological properties of mono- and double-layer Ti3C2Tx MXenes deposited by the Langmuir-Schaefer technique on SiO2/Si substrates. The friction of all of the samples demonstrated superior lubrication properties with respect to SiO2 substrate, while the friction force of the monolayers was found to be slightly higher compared to double- and three-layer flakes, which demonstrated similar friction. The coefficient of friction was estimated to be 0.087 ± 0.002 and 0.082 ± 0.003 for mono- and double-layer flakes, respectively. The viscous regime was suggested as the dominant friction mechanism at high scanning velocities, while the meniscus forces affected by contamination of the MXenes surface were proposed to control the friction at low sliding velocities.
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Affiliation(s)
- Andrii Kozak
- Centre for Advanced Materials Application SAS, Dúbravská cesta 9, Bratislava 845 11, Slovakia
| | - Monika Hofbauerová
- Centre for Advanced Materials Application SAS, Dúbravská cesta 9, Bratislava 845 11, Slovakia
- Institute of Physics SAS, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
| | - Yuriy Halahovets
- Institute of Physics SAS, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
| | - Lenka Pribusová-Slušná
- Centre for Advanced Materials Application SAS, Dúbravská cesta 9, Bratislava 845 11, Slovakia
- Institute of Electrical Engineering SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Marián Precner
- Institute of Electrical Engineering SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Matej Mičušík
- Polymer Institute SAS, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - L'ubomír Orovčík
- Institute of Materials and Machine Mechanics SAS, Dúbravská cesta 9, 845 13 Bratislava, Slovakia
| | - Martin Hulman
- Institute of Electrical Engineering SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | | | - Mária Omastová
- Polymer Institute SAS, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Peter Šiffalovič
- Centre for Advanced Materials Application SAS, Dúbravská cesta 9, Bratislava 845 11, Slovakia
- Institute of Physics SAS, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
| | - Milan Ťapajna
- Centre for Advanced Materials Application SAS, Dúbravská cesta 9, Bratislava 845 11, Slovakia
- Institute of Electrical Engineering SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
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17
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Li J, Chu W, Gao Q, Zhang H, He X, Wang B. In Situ Fabrication of Magnetic and Hierarchically Porous Carbon Films for Efficient Electromagnetic Wave Shielding and Absorption. ACS APPLIED MATERIALS & INTERFACES 2022; 14:33675-33685. [PMID: 35833957 DOI: 10.1021/acsami.2c05286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Carbon-based materials have been recognized as a promising method to eliminate electromagnetic interference (EMI) shielding and electromagnetic (EM) wave absorption. However, developing lightweight, ultrathin, and efficient EM wave-shielding and wave-absorbing materials remains a challenge. Herein, a series of magnetic porous carbon composite films with a hierarchical network structure were fabricated via pyrolysis of porous polyimide (PI) films containing magnetic metallic salts of Fe(acac)3 and Ni(acac)2. After pyrolysis, the obtained uniform porous carbon films (CFs) possess a favorable EMI-shielding efficiency (SE) of 46 dB in the X-band with a thickness of ∼0.3 mm. In addition, a higher EMI SE of 58 dB can be achieved by increasing the thickness of the porous CF-20Ni to 0.53 mm. Moreover, the CF-20Ni composites also present effective EM wave-absorbing performance of RLmin = - 30.2 dB with a loading amount of 20 wt % at 13.0 GHz owing to the hierarchically conductive carbon skeleton, magnetic Ni nanoparticles, and dielectric interlaced carbon nanotube cluster within the micropores. These novel lightweight and ultrathin porous CFs are expected to be attractive candidates for efficient EM wave absorption and EMI shielding.
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Affiliation(s)
- Jianwei Li
- School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
| | - Wei Chu
- School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
| | - Qiang Gao
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Hongming Zhang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xinhai He
- School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
| | - Bin Wang
- School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
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18
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Chand K, Zhang X, Chen Y. Recent Progress in MXene and Graphene based Nanocomposites for Microwave Absorption and EMI Shielding. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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19
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Song R, Jiang S, Hu Z, Fan C, Li P, Ge Q, Mao B, He D. Ultra-high conductive graphene assembled film for millimeter wave electromagnetic protection. Sci Bull (Beijing) 2022; 67:1122-1125. [PMID: 36545977 DOI: 10.1016/j.scib.2022.03.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/28/2022] [Accepted: 03/15/2022] [Indexed: 01/07/2023]
Affiliation(s)
- Rongguo Song
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Shaoqiu Jiang
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Zelong Hu
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Chi Fan
- The National Key Laboratory of Antennas and Microwave Technology, Xidian University, Xi' an 710071, China
| | - Peng Li
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Qi Ge
- Chongqing 2D Materials Institute, Chongqing 400714, China
| | - Boyang Mao
- Chongqing 2D Materials Institute, Chongqing 400714, China.
| | - Daping He
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China.
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Shi Y, Xiang Z, Cai L, Pan F, Dong Y, Zhu X, Cheng J, Jiang H, Lu W. Multi-interface Assembled N-Doped MXene/HCFG/AgNW Films for Wearable Electromagnetic Shielding Devices with Multimodal Energy Conversion and Healthcare Monitoring Performances. ACS NANO 2022; 16:7816-7833. [PMID: 35536615 DOI: 10.1021/acsnano.2c00448] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
With the progressive requirements of modern electronics, outstanding electromagnetic interference (EMI) shielding materials are extensively desirable to protect intelligent electronic equipment against EMI radiation under various conditions, while integrating functional applications. So far, it remains a great challenge to effectively construct thin films with diversiform frameworks as integrated shielding devices. To simultaneously promote electromagnetic waves (EMWs) attenuation and construct integrated multifunction, an alternating-layered deposition strategy is designed to fabricate polydimethylsiloxane packaged N-doped MXene (Ti3CNTx)/graphene oxide wrapped hollow carbon fiber/silver nanowire films (p-LMHA) followed by annealing and encapsulation approaches. Contributed by the synergistic effect of consecutively conductive networks and porous architectures, LMHA films exhibit satisfying EMI shielding effectiveness of 73.2 dB at a thickness of 11 μm, with a specific EMI shielding effectiveness of 31 150.1 dB·cm2·g-1. Benefiting from the encapsulation, p-LMHA films further impart hydrophobicity and reliability against harsh environments. Besides, p-LMHA devices integrate a rapid-response behavior of the electro/photothermal and, meanwhile, function as a healthcare monitoring sensor. Therefore, it is believed that the p-LMHA films assembled by independent conductive networks with reliability offer a facile solution for practical multimodular protection of devices with integration characteristics.
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Affiliation(s)
- Yuyang Shi
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Zhen Xiang
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Lei Cai
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Fei Pan
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Yanyan Dong
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Xiaojie Zhu
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Jie Cheng
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Haojie Jiang
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
| | - Wei Lu
- Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China
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21
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Sima H, Sui Y, Zhang C. Preparation of polysiloxane foam with graphene for promoting electromagnetic interference shielding performance and thermal stability. J Appl Polym Sci 2022. [DOI: 10.1002/app.52376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Haofei Sima
- School of Materials Science and Engineering Jilin University Changchun China
| | - Yanlong Sui
- School of Materials Science and Engineering Jilin University Changchun China
| | - Chunling Zhang
- School of Materials Science and Engineering Jilin University Changchun China
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22
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Yu Y, Yi P, Xu W, Sun X, Deng G, Liu X, Shui J, Yu R. Environmentally Tough and Stretchable MXene Organohydrogel with Exceptionally Enhanced Electromagnetic Interference Shielding Performances. NANO-MICRO LETTERS 2022; 14:77. [PMID: 35312862 PMCID: PMC8938570 DOI: 10.1007/s40820-022-00819-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/09/2022] [Indexed: 05/04/2023]
Abstract
Conductive hydrogels have potential applications in shielding electromagnetic (EM) radiation interference in deformable and wearable electronic devices, but usually suffer from poor environmental stability and stretching-induced shielding performance degradation. Although organohydrogels can improve the environmental stability of materials, their development is at the expense of reducing electrical conductivity and thus weakening EM interference shielding ability. Here, a MXene organohydrogel is prepared which is composed of MXene network for electron conduction, binary solvent channels for ion conduction, and abundant solvent-polymer-MXene interfaces for EM wave scattering. This organohydrogel possesses excellent anti-drying ability, low-temperature tolerance, stretchability, shape adaptability, adhesion and rapid self-healing ability. Two effective strategies have been proposed to solve the problems of current organohydrogel shielding materials. By reasonably controlling the MXene content and the glycerol-water ratio in the gel, MXene organohydrogel can exhibit exceptionally enhanced EM interference shielding performances compared to MXene hydrogel due to the increased physical cross-linking density of the gel. Moreover, MXene organohydrogel shows attractive stretching-enhanced interference effectiveness, caused by the connection and parallel arrangement of MXene nanosheets. This well-designed MXene organohydrogel has potential applications in shielding EM interference in deformable and wearable electronic devices.
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Affiliation(s)
- Yuanhang Yu
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
| | - Peng Yi
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
| | - Wenbin Xu
- Science and Technology on Optical Radiation Laboratory, Beijing Institute of Environmental Features, Beijing, 100854, People's Republic of China
| | - Xin Sun
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
- Science and Technology on Electromagnetic Scattering Laboratory, Beijing Institute of Environmental Features, Beijing, 100854, People's Republic of China
| | - Gao Deng
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
| | - Xiaofang Liu
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China.
| | - Jianglan Shui
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
| | - Ronghai Yu
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, People's Republic of China
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Yang J, Liu Z, Zhou H, Jia L, Wu A, Jiang L. Enhanced Electromagnetic-Wave Absorbing Performances and Corrosion Resistance via Tuning Ti Contents in FeCoNiCuTi x High-Entropy Alloys. ACS APPLIED MATERIALS & INTERFACES 2022; 14:12375-12384. [PMID: 35244391 DOI: 10.1021/acsami.1c25079] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Efficient and stable electromagnetic-wave (EMW) absorption materials have attracted great attention in the field of reducing microwave pollution. Herein, FeCoNiCuTix high-entropy alloys (HEAs) as electromagnetic-wave absorbing materials were prepared by a high-energy ball-milling method. The as-milled HEA powders presented a flaky shape with a high aspect ratio. Impedance matching was efficiently optimized by severe lattice distortion, which was caused by Ti incorporation. The introduced plentiful defects in FeCoNiCuTix HEAs provided abundant polarization sites for dielectric loss. By tuning Ti contents, FeCoNiCuTi0.2 HEAs delivered excellent EMW absorption performances. The maximal reflection loss (RLmax) values reached -47.8 dB at 10.86 GHz as thin as 2.16 mm, and the widest bandwidth was 4.76 GHz (5.97-10.73 GHz). Furthermore, the introduction of Ti enhanced corrosion resistance via increasing the charge transfer resistance of a passivated film. Those characteristics of FeCoNiCuTix HEAs made these materials a practical gigahertz-range EMW absorber. Additionally, our findings provided a facile and tunable strategy for designing EMW absorbing materials, which was aimed at lightweight, highly efficient absorption, and resistance to harsh environments.
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Affiliation(s)
- Jianping Yang
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo University, Ningbo 315211, P. R. China
| | - Zhonghao Liu
- Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Haoran Zhou
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo University, Ningbo 315211, P. R. China
| | - Lei Jia
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo University, Ningbo 315211, P. R. China
| | - Anhua Wu
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
| | - Linwen Jiang
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo University, Ningbo 315211, P. R. China
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Li Y, Wang G, Gong A, Zhang S, Liu J, Sun N, Hao X. High-Performance Ferroelectric Electromagnetic Attenuation Materials with Multiple Polar Units Based on Nanodomain Engineering. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106302. [PMID: 35072336 DOI: 10.1002/smll.202106302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 12/16/2021] [Indexed: 06/14/2023]
Abstract
The multirelaxation behavior is promising for high-performance dielectric materials based on polarization-controllable high-efficiency electromagnetic attenuation. However, a single polar unit is the main problem that restricts the development of dielectric materials in the field. Herein, by constructing multiple polar units based on nanodomain engineering, enhanced electromagnetic attenuation properties are achieved in La doping BiFeO3 ferroelectric ceramics. A dual-band attenuation with a maximum reflection loss of -43.4 dB together with a wide effective bandwidth (<-10 dB) of 3.3 GHz in X-band, is acquired in Bi0.85 La0.15 FeO3 which just has a thickness of 1.54 mm. A systematic experimental analysis coupled with potential well modeling suggests that the miniaturization of the ferroelectric domain, from micron to nanoscale, induces an additional interface polarization that is capable of responding to microwave frequency, leading to the formation of dual dielectric relaxation. The way that intrinsic polar unit induces another polar unit through size effect to obtain multiple contributions of electromagnetic loss provides a feasible and universal strategy to design high-performance electromagnetic attenuation materials based on the ferroelectric family.
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Affiliation(s)
- Yong Li
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
| | - Guangcheng Wang
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
| | - Ao Gong
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
| | - Shan Zhang
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
| | - Jia Liu
- Aerospace Institute of Advanced Materials & Processing Technology, Beijing, 100074, China
| | - Ningning Sun
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
| | - Xihong Hao
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China
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25
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Li Q, Zhao X, Zhang Z, Xun X, Zhao B, Xu L, Kang Z, Liao Q, Zhang Y. Architecture Design and Interface Engineering of Self-assembly VS 4/rGO Heterostructures for Ultrathin Absorbent. NANO-MICRO LETTERS 2022; 14:67. [PMID: 35211806 PMCID: PMC8873340 DOI: 10.1007/s40820-022-00809-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 01/18/2022] [Indexed: 05/03/2023]
Abstract
The employment of microwave absorbents is highly desirable to address the increasing threats of electromagnetic pollution. Importantly, developing ultrathin absorbent is acknowledged as a linchpin in the design of lightweight and flexible electronic devices, but there are remaining unprecedented challenges. Herein, the self-assembly VS4/rGO heterostructure is constructed to be engineered as ultrathin microwave absorbent through the strategies of architecture design and interface engineering. The microarchitecture and heterointerface of VS4/rGO heterostructure can be regulated by the generation of VS4 nanorods anchored on rGO, which can effectively modulate the impedance matching and attenuation constant. The maximum reflection loss of 2VS4/rGO40 heterostructure can reach - 43.5 dB at 14 GHz with the impedance matching and attenuation constant approaching 0.98 and 187, respectively. The effective absorption bandwidth of 4.8 GHz can be achieved with an ultrathin thickness of 1.4 mm. The far-reaching comprehension of the heterointerface on microwave absorption performance is explicitly unveiled by experimental results and theoretical calculations. Microarchitecture and heterointerface synergistically inspire multi-dimensional advantages to enhance dipole polarization, interfacial polarization, and multiple reflections and scatterings of microwaves. Overall, the strategies of architecture design and interface engineering pave the way for achieving ultrathin and enhanced microwave absorption materials.
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Affiliation(s)
- Qi Li
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Xuan Zhao
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Zheng Zhang
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Xiaochen Xun
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Bin Zhao
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Liangxu Xu
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Zhuo Kang
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
| | - Qingliang Liao
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
| | - Yue Zhang
- Academy for Advanced Interdisciplinary Science and Technology, Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
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26
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Polymeric Nanocomposites for Environmental and Industrial Applications. Int J Mol Sci 2022; 23:ijms23031023. [PMID: 35162946 PMCID: PMC8835668 DOI: 10.3390/ijms23031023] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/10/2022] [Accepted: 01/16/2022] [Indexed: 12/20/2022] Open
Abstract
Polymeric nanocomposites (PNC) have an outstanding potential for various applications as the integrated structure of the PNCs exhibits properties that none of its component materials individually possess. Moreover, it is possible to fabricate PNCs into desired shapes and sizes, which would enable controlling their properties, such as their surface area, magnetic behavior, optical properties, and catalytic activity. The low cost and light weight of PNCs have further contributed to their potential in various environmental and industrial applications. Stimuli-responsive nanocomposites are a subgroup of PNCs having a minimum of one promising chemical and physical property that may be controlled by or follow a stimulus response. Such outstanding properties and behaviors have extended the scope of application of these nanocomposites. The present review discusses the various methods of preparation available for PNCs, including in situ synthesis, solution mixing, melt blending, and electrospinning. In addition, various environmental and industrial applications of PNCs, including those in the fields of water treatment, electromagnetic shielding in aerospace applications, sensor devices, and food packaging, are outlined.
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Yang X, Duan Y, Li S, Pang H, Huang L, Fu Y, Wang T. Bio-Inspired Microwave Modulator for High-Temperature Electromagnetic Protection, Infrared Stealth and Operating Temperature Monitoring. NANO-MICRO LETTERS 2021; 14:28. [PMID: 34902068 PMCID: PMC8669058 DOI: 10.1007/s40820-021-00776-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 11/06/2021] [Indexed: 05/07/2023]
Abstract
High-temperature electromagnetic (EM) protection materials integrated of multiple EM protection mechanisms and functions are regarded as desirable candidates for solving EM interference over a wide temperature range. In this work, a novel microwave modulator is fabricated by introducing carbonyl iron particles (CIP)/resin into channels of carbonized wood (C-wood). Innovatively, the spaced arrangement of two microwave absorbents not only achieves a synergistic enhancement of magnetic and dielectric losses, but also breaks the translational invariance of EM characteristics in the horizontal direction to obtain multiple phase discontinuities in the frequency range of 8.2-18.0 GHz achieving modulation of reflected wave radiation direction. Accordingly, CIP/C-wood microwave modulator demonstrates the maximum effective bandwidth of 5.2 GHz and the maximum EM protection efficiency over 97% with a thickness of only 1.5 mm in the temperature range 298-673 K. Besides, CIP/C-wood microwave modulator shows stable and low thermal conductivities, as well as monotonic electrical conductivity-temperature characteristics, therefore it can also achieve thermal infrared stealth and working temperature monitoring in wide temperature ranges. This work provides an inspiration for the design of high-temperature EM protection materials with multiple EM protection mechanisms and functions.
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Affiliation(s)
- Xuan Yang
- Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Yuping Duan
- Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China.
| | - Shuqing Li
- Science and Technology On Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing, 100024, People's Republic of China
| | - Huifang Pang
- Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Lingxi Huang
- Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Yuanyuan Fu
- Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China
| | - Tongmin Wang
- Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116085, People's Republic of China.
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28
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Ma L, Hamidinejad M, Zhao B, Liang C, Park CB. Layered Foam/Film Polymer Nanocomposites with Highly Efficient EMI Shielding Properties and Ultralow Reflection. NANO-MICRO LETTERS 2021; 14:19. [PMID: 34874495 PMCID: PMC8651911 DOI: 10.1007/s40820-021-00759-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/10/2021] [Indexed: 05/21/2023]
Abstract
Lightweight, high-efficiency and low reflection electromagnetic interference (EMI) shielding polymer composites are greatly desired for addressing the challenge of ever-increasing electromagnetic pollution. Lightweight layered foam/film PVDF nanocomposites with efficient EMI shielding effectiveness and ultralow reflection power were fabricated by physical foaming. The unique layered foam/film structure was composed of PVDF/SiCnw/MXene (Ti3C2Tx) composite foam as absorption layer and highly conductive PVDF/MWCNT/GnPs composite film as a reflection layer. The foam layer with numerous heterogeneous interfaces developed between the SiC nanowires (SiCnw) and 2D MXene nanosheets imparted superior EM wave attenuation capability. Furthermore, the microcellular structure effectively tuned the impedance matching and prolonged the wave propagating path by internal scattering and multiple reflections. Meanwhile, the highly conductive PVDF/MWCNT/GnPs composite (~ 220 S m-1) exhibited superior reflectivity (R) of 0.95. The tailored structure in the layered foam/film PVDF nanocomposite exhibited an EMI SE of 32.6 dB and a low reflection bandwidth of 4 GHz (R < 0.1) over the Ku-band (12.4 - 18.0 GHz) at a thickness of 1.95 mm. A peak SER of 3.1 × 10-4 dB was obtained which corresponds to only 0.0022% reflection efficiency. In consequence, this study introduces a feasible approach to develop lightweight, high-efficiency EMI shielding materials with ultralow reflection for emerging applications.
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Affiliation(s)
- Li Ma
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada
| | - Mahdi Hamidinejad
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada
- Institute for Manufacturing, Department of Engineering, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Biao Zhao
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai, 200438, People's Republic of China.
- Henan Key Laboratory of Aeronautical Materials and Application Technology, School of Material Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, Henan, 450046, People's Republic of China.
| | - Caiyun Liang
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People's Republic of China
| | - Chul B Park
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
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29
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Lou Z, Wang Q, Kara UI, Mamtani RS, Zhou X, Bian H, Yang Z, Li Y, Lv H, Adera S, Wang X. Biomass-Derived Carbon Heterostructures Enable Environmentally Adaptive Wideband Electromagnetic Wave Absorbers. NANO-MICRO LETTERS 2021; 14:11. [PMID: 34862949 PMCID: PMC8643388 DOI: 10.1007/s40820-021-00750-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/08/2021] [Indexed: 05/19/2023]
Abstract
Although advances in wireless technologies such as miniature and wearable electronics have improved the quality of our lives, the ubiquitous use of electronics comes at the expense of increased exposure to electromagnetic (EM) radiation. Up to date, extensive efforts have been made to develop high-performance EM absorbers based on synthetic materials. However, the design of an EM absorber with both exceptional EM dissipation ability and good environmental adaptability remains a substantial challenge. Here, we report the design of a class of carbon heterostructures via hierarchical assembly of graphitized lignocellulose derived from bamboo. Specifically, the assemblies of nanofibers and nanosheets behave as a nanometer-sized antenna, which results in an enhancement of the conductive loss. In addition, we show that the composition of cellulose and lignin in the precursor significantly influences the shape of the assembly and the formation of covalent bonds, which affect the dielectric response-ability and the surface hydrophobicity (the apparent contact angle of water can reach 135°). Finally, we demonstrate that the obtained carbon heterostructure maintains its wideband EM absorption with an effective absorption frequency ranging from 12.5 to 16.7 GHz under conditions that simulate the real-world environment, including exposure to rainwater with slightly acidic/alkaline pH values. Overall, the advances reported in this work provide new design principles for the synthesis of high-performance EM absorbers that can find practical applications in real-world environments.
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Affiliation(s)
- Zhichao Lou
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Qiuyi Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Ufuoma I Kara
- Willian G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA
| | - Rajdeep S Mamtani
- Willian G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA
| | - Xiaodi Zhou
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Huiyang Bian
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Zhihong Yang
- Institute of Materials Research and Engineering, Agency for Sciences, Technology and Research, Singapore, Singapore
| | - Yanjun Li
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
| | - Hualiang Lv
- Willian G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA.
| | - Solomon Adera
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Xiaoguang Wang
- Willian G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA.
- Sustainability Institute, The Ohio State University, Columbus, OH, 43210, USA.
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30
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Han Y, Yuan J, Zhu Y, Wang Q, Li L, Cao M. Implantation of WSe 2 nanosheets into multi-walled carbon nanotubes for enhanced microwave absorption. J Colloid Interface Sci 2021; 609:746-754. [PMID: 34839924 DOI: 10.1016/j.jcis.2021.11.079] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/13/2021] [Accepted: 11/15/2021] [Indexed: 12/19/2022]
Abstract
Microwave absorption materials can protect humanity from harmful electromagnetic radiation, but it is still a challenge to absorb electromagnetic radiation with different bands simultaneously. Herein, an effective strategy for obtaining WSe2@CNTs nanohybrids is reported. The conductive network and polarization of WSe2@CNTs nanohybrids can be tailored by confinedly implanting WSe2 nanosheets on multi-walled carbon nanotubes. The electromagnetic properties and microwave absorption performance of the nanohybrids are effectively adjusted via changing the hybrid ratio of WSe2 and CNTs. Multi-band microwave absorption is achieved with up to three bands. The reflection loss (RL) of the sample can reach -60.1 dB, and the bandwidth can reach 4.24 GHz (RL ≤ -10 dB). The excellent microwave absorption performance is attributed to the conductance and multiple relaxations, as well as the synergistic effect of the two. This result confirms that WSe2@CNTs nanohybrids are potential candidates for high-efficiency microwave absorbers and provide a valuable pathway for designing high-performance microwave absorption materials in the future.
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Affiliation(s)
- Yuhang Han
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics & Electronic Engineering, Harbin Normal University, Harbin 150025, China
| | - Jie Yuan
- School of Information Engineering, Minzu University of China, Beijing 100081, China
| | - Yuhang Zhu
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Qiangqiang Wang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Lin Li
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics & Electronic Engineering, Harbin Normal University, Harbin 150025, China.
| | - Maosheng Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
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31
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Dey CC, Sadhukhan S, Mitra A, Dalal M, Shaw A, Bajorek A, Chakrabarti PK. Magnetic Energy Morphing, Capacitive Concept for Ni 0.3Zn 0.4Ca 0.3Fe 2O 4 Nanoparticles Embedded in Graphene Oxide Matrix, and Studies of Wideband Tunable Microwave Absorption. ACS APPLIED MATERIALS & INTERFACES 2021; 13:46967-46979. [PMID: 34550668 DOI: 10.1021/acsami.1c10241] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanoparticles of Ni0.3Zn0.4Ca0.3Fe2O4 (NZCF) were successfully prepared by the facile wet chemical method coupled with the sonochemical method. These nanoparticles were embedded in a graphene oxide (GO) matrix (NZCFG). Rietveld analyses of X-ray diffraction, transmission electron microscope, scanning electron microscope, and X-ray photoelectron spectroscopy were carried out to extract different relevant information regarding the structure, morphology, and ionic state. A major improvement in saturation magnetization is achieved due to substitution of Ca2+ in the ferrite lattice. Interestingly, the observed value of electromagnetic absorption for a sample thickness of 1.5 mm is ∼-67.7 dB at 13.3 GHz, and the corresponding bandwidth is 5.73 GHz. The Cole-Cole plot, the Jonscher power-law fitting, and the Nyquist plot confirm the probability of improved hopping conductance and attractive capacitive behavior in NZCFG. The presence of magnetic energy morphing in combination with a higher attenuation constant, lower skin depth, and various forms of resonance and relaxation makes NZCFG the most suitable for microwave absorption.
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Affiliation(s)
- Chandi Charan Dey
- Solid State Research Laboratory, Department of Physics, Burdwan University, Burdwan 713104, West Bengal, India
| | - Sukhendu Sadhukhan
- Solid State Research Laboratory, Department of Physics, Burdwan University, Burdwan 713104, West Bengal, India
| | - Ayan Mitra
- Solid State Research Laboratory, Department of Physics, Burdwan University, Burdwan 713104, West Bengal, India
| | - Madhumita Dalal
- Solid State Research Laboratory, Department of Physics, Burdwan University, Burdwan 713104, West Bengal, India
| | - Anirban Shaw
- Solid State Research Laboratory, Department of Physics, Burdwan University, Burdwan 713104, West Bengal, India
- Department of Physics, Dhruba Chand Halder College, Dakshin Barasat, South 24 Parganas 743372, West Bengal, India
| | - Anna Bajorek
- A. Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Pabitra K Chakrabarti
- Solid State Research Laboratory, Department of Physics, Burdwan University, Burdwan 713104, West Bengal, India
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32
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Shooshtary Veisi S, Yousefi M, Amini M, Shakeri A, Bagherzadeh M, Afghahi SS. Magnetic properties, structural studies and microwave absorption performance of Ba0.5Sr0.5CuxZrxFe12-2xO19/Poly Ortho-Toluidine (X = 0.2,0.4, 0.6, 0.8) ceramic nanocomposites. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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33
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Xu J, Zhao N, Qin B, Qu M, Wang X, Ridi B, Li C, Gao Y. Optical Wavelength Selective Photoactuation of Nanometal-Doped Liquid Crystalline Elastomers by Using Surface Plasmon Resonance. ACS APPLIED MATERIALS & INTERFACES 2021; 13:44833-44843. [PMID: 34499488 DOI: 10.1021/acsami.1c08464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoactuated liquid crystalline elastomer (LCE) materials are gaining much attention in many application fields, but challenges for the precise modulation of their photoresponses still exist. Researchers have explored various optical parameters, such as polarization, intensity, and wavelength, to obtain differential responses. The development of photoactuated LCE materials with wavelength-selective responsiveness is more versatile and has attracted more interest, but such LCE materials are commonly prepared by incorporating different molecular chromophores or dyes into the LCE matrices. When the surface plasmon resonance (SPR) characteristic of nanometals, which can generate strong photothermal conversion, and the difference of SPR absorption wavelength bands of different nanometals are considered, a strategy of constructing wavelength-selective actuation of LCE materials by using the SPR photothermal effect can be demonstrated, as done herein. The LCE nanocomposites doped by nanogold or nanosilver were fabricated and exhibited good SPR absorption but in different wavelength bands of the visible spectrum range. They had strong actuation under light irradiation with the wavelengths being inside their respective absorption band but could not be effectively actuated by the light beyond their respective absorption band. A smart electronic device, implementing a hierarchical structured LCE nanocomposite doped by nanogold and nanosilver in different domains as the two-switch actuator, was prepared and capable of outputting different signals in response to the different wavelength bands filtered from a light source, which released the actuator from the restriction of light scanning direction or position. Our work provides new insights for the convenient and precise photoactuation of the LCE actuators.
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Affiliation(s)
- Jiaojiao Xu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P.R China
| | - Nan Zhao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P.R China
| | - Ban Qin
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P.R China
| | - Minghan Qu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P.R China
| | - Xiuxiu Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P.R China
| | - Buyinga Ridi
- Key Laboratory of Electronics Engineering, College of Heilongjiang Province, Heilongjiang University, Harbin 150080, P. R China
| | - Chensha Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P.R China
| | - Yachen Gao
- Key Laboratory of Electronics Engineering, College of Heilongjiang Province, Heilongjiang University, Harbin 150080, P. R China
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Fang YS, Cao WQ, Chen YB, Sun XD, Cao MS. Ti 3C 2T xnanohybrids: tunable local conductive network and efficient EMI shielding performance for multifunctional materials and devices. NANOTECHNOLOGY 2021; 32:442002. [PMID: 34320474 DOI: 10.1088/1361-6528/ac18a0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
Ti3C2Txis an important member of the MXenes family. Due to its excellent electrical conductivity, adjustable atomic layer, and modifiable active surface, Ti3C2Txhas attracted great attention in the field of electromagnetic interference (EMI) shielding. This paper introduces the important role of regulating conductive network to improve the EMI shielding performance of materials and summarizes the EMI shielding performance of Ti3C2Txnanohybrids reported in recent years. In addition, Ti3C2Txbased EMI shielding materials towards multifunctional devices are also systematically introduced. After that, the development status of Ti3C2Txnanohybrids in the field of EMI shielding is objectively described, and the main problems and challenges are evaluated. Finally, the prospect of Ti3C2Txnanohybrids for advanced and green EMI shielding materials is forecasted.
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Affiliation(s)
- Yong-Sheng Fang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Wen-Qiang Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Yu-Bin Chen
- Beijing Institute of Aeronautical Materials, Beijing 100095, People's Republic of China
| | - Xiao-Di Sun
- Department of Oral Implantology, Tianjin Stomatological Hospital, Hospital of Stomatology, Nankai University, Tianjin 300041, People's Republic of China
- Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction, People's Republic of China
| | - Mao-Sheng Cao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
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35
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Zhou Z, Zhao W, Zhao Z, Fu H. Boosted Interfacial Polarization from the Multidimensional Core–Shell–Flat Heterostructure CNP@PDA@GO/rGO for Enhanced Microwave Absorption. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02279] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhaoxi Zhou
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Wenjie Zhao
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Zhuowei Zhao
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Heqing Fu
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
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36
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Zhang Z, Wang G, Gu W, Zhao Y, Tang S, Ji G. A breathable and flexible fiber cloth based on cellulose/polyaniline cellular membrane for microwave shielding and absorbing applications. J Colloid Interface Sci 2021; 605:193-203. [PMID: 34325341 DOI: 10.1016/j.jcis.2021.07.085] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/08/2021] [Accepted: 07/15/2021] [Indexed: 12/18/2022]
Abstract
High-performance electromagnetic (EM) wave absorption and shielding materials integrating with flexibility, air permeability, and anti-fatigue characteristics are of great potential in portable and wearable electronics. These materials usually prepared by depositing metal or alloy coatings on fabrics. However, the shortcomings of heavy weight and easy corrosion hamper its application. In this work, the cellulose nanofiber (CF) fabric was prepared by electrospinning technology. Then, conductive polyaniline (PANI) was deposited on the CF surface via a facile in-situ polymerization process. The interweaving cellulose/polyaniline nanofiber (CPF) composite constructs a conductive network, and the electrical conductivity can be adjusted by polymerization time. Benefiting from optimal impedance matching, strong conductive loss, as well as interfacial polarization, the CPF possesses excellent EM absorption performance. The minimum reflection loss (RLmin) value is -49.24 dB, and the effective absorption bandwidth (RL < -10 dB, fe) reaches 6.90 GHz. Furthermore, the CPF also exhibits outstanding electromagnetic interference (EMI) shielding capability with shielding efficiency (SE) of 34.93 dB in the whole X band. Most importantly, the lightweight CPF fabrics have the merits of mechanical flexibility, breathability and wash resistance, which is highly applicable for wearable devices.
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Affiliation(s)
- Zhu Zhang
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China
| | - GeHuan Wang
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China
| | - Weihua Gu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China
| | - Yue Zhao
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China
| | - Shaolong Tang
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Guangbin Ji
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
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