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Summary: Compared with other absorption materials, multicomponent carbon nanotubes composite materials have become increasingly important in the preparation of high-performance electromagnetic wave absorption materials due to their unique dielectric-magnetic advantages. In this paper, an excellent performance of Co/Cu/CrN/CNTs composite materials was prepared by the heating and disintegration of organic amine salt to achieve the restoration of oxides while derivating carbon nanotubes. Due to annealing, slim-shaped CrN evenly attached to the surface of carbon nanotubes. The material forms a rich interface and good impedance matching characteristics, thereby realizing the excellent electromagnetic wave absorption performance of the material.
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You Wu et al.
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NANO-MICRO LETTERS
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Hanxiao Xu et al.
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You Wu et al.
Summary: This study demonstrates an efficient strategy to produce CNT incorporated aramid papers by utilizing carbon nanotubes (CNTs) through layer-by-layer self-assembly technique. The hierarchical construction of CNT networks solves the challenge of increasing CNT content and preventing CNT agglomeration in polymeric composites. The composite paper with abundant heterogeneous interfaces and long-range conductive networks achieves high permittivity and dielectric loss tangent, and its complex permittivity is adjustable within a wide range at 10 GHz. Some papers with optimal thickness show high-efficiency microwave absorption with a reflection loss below -10 dB in the entire X-band.
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Runrun Cheng et al.
Summary: In this study, the electromagnetic wave absorption performance of Co9S8/FeCoS2/C composite material was investigated by designing lightweight absorbers. The experimental results showed that the composite material exhibited excellent absorption performance and achieved ideal absorption even at low filler loading. This is attributed to the sulfur doping in the material, which enhances the interface polarization relaxation process and improves impedance matching characteristics.
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(2022)
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Xiaomeng Guan et al.
Summary: This article reviews the construction strategies, electromagnetic wave conversion mechanism, and applications of MXene materials, highlighting their unique layered structure and outstanding chemical and physical properties. Through meticulous design and interdisciplinary approach, MXene materials are expected to become one of the smart tunable wave absorbers.
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Jiaoyan Shi et al.
Summary: This study demonstrates the use of molecular engineering concepts to control the structure of aromatic polymers and obtain high-performance derived carbon materials. By creating dipole polarization and dielectric resonance loss, the resulting derived carbon materials show outstanding electromagnetic wave absorption properties.
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Xiaofeng Shi et al.
Summary: Novel hierarchical Fe3O4@C microspheres are successfully fabricated via polydopamine confinement and sequential calcination, showing unique performance superiority in microwave absorption due to engineered interfaces. These results provide new insights into the preparation of efficient microwave absorbers through microstructure engineering.
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Tianqi Hou et al.
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Summary: The development of microwave absorption materials (MAMs) is crucial due to the threat electromagnetic waves pose to human health. Metal-organic frameworks (MOFs) have been highly studied for their diverse properties and ability to transform into porous carbon (PC). Researchers are exploring ways to improve absorption performance by coupling MOFs with other materials.
NANO-MICRO LETTERS
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Wei Xue et al.
Summary: The study successfully prepared caterpillar-like structured Co/MnO/CNTs and demonstrated their excellent performance in electromagnetic wave absorption. Due to the hierarchical structure of the material, it is able to effectively absorb electromagnetic waves over a wide frequency range, achieving outstanding absorption results even with a thin thickness.
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Summary: Developing high-efficiency microwave absorption materials is crucial for solving electromagnetic pollution issues, with carbon/magnetic metal composites being promising candidates for high-performance microwave absorbers. Understanding the mechanisms of microwave absorption and exploring the preparation methods and properties of these composites indicate great potential for the future development of high-performance microwave absorption materials.
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