Regulating Growth Kinetics of Carbon Nanotubes Toward Efficient Microwave Absorption DOI Open Access
Yi Yan, Jintang Zhou, Jiaqi Tao

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Carbon nanotubes (CNTs) show great promise for microwave absorption (MA) due to their excellent electrical conductivity and lightweight properties, which are conferred by the one dimensional hollow tubular structure. However, ambiguous intrinsic motivations behind formation of CNTs intricate growth processes have resulted in a lack systematic methodology precisely controlling electromagnetic properties. Herein, flexible regulation strategy is designed develop, with core focus being directional carbon atoms differential catalysis metal sources. By improving kinetics, material achieves effective impedance matching attenuation, displaying notable magnetoelectric coupling effects. In particular, COMSOL simulations reveal enhanced dielectric loss contributing efficient energy conversion. Ultimately, demonstrates minimum reflection (RL

Язык: Английский

Multiscale Design of Dielectric Composites for Enhanced Microwave Absorption Performance at Elevated Temperatures DOI Open Access
Bo Hao, Yi Zhang,

Haoxu Si

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Abstract Aerospace vehicles and electronic devices are often operated in elevated temperature environments, which has led to an increased demand for high‐temperature microwave absorbing materials (MAMs). The absorption properties of MAMs influenced not only by the intrinsic material characteristics but also micro‐, meso‐, macro‐structural configurations composites. This paper reviews recent advancements through a multiscale design approach. Due sensitivity permittivity, tend exhibit reflection behavior at temperatures. Strategies aimed regulating conductivity polarization can enhance impedance matching under these conditions; however, this results unavoidable reduction loss capability. In contrast traditional methodologies, constructed from subwavelength‐scale functional units achieve remarkable anti‐reflection effects discrete unit distribution, thereby significantly optimizing both dielectric capacity matching. Furthermore, equivalent electromagnetic parameters metacomposites intrinsically linked their physical structural attributes. relationship offers novel strategy enhancing performance. It is anticipated that review will provide insightful guidance future explorations into innovative highly efficient MAMs.

Язык: Английский

Процитировано

3
Harmonization of heterointerface states to enhance built-in electric field effects for electromagnetic wave absorption DOI

Hongbao Zhu,

Yi Yan,

Jintang Zhou

и другие.

Journal of Material Science and Technology, Год журнала: 2025, Номер 229, С. 223 - 234

Опубликована: Фев. 16, 2025

Язык: Английский

Процитировано

2
Solvent-engineered in-situ heterogenization of copper-based sulfides for broadening electromagnetic wave absorption DOI
Jiaolong Liu, Moxuan Yin, Zhuolin Liu

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160742 - 160742

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

0
Constructing metal/metal heterointerfaces in lamellar structured FeSiCr@Fe3O4 composites for stable, strong and broad microwave absorption via FeSiAl nanoparticles embedding DOI

Shuwei Ma,

Tao Jing,

Yuanhong Wan

и другие.

Applied Surface Science, Год журнала: 2025, Номер 694, С. 162849 - 162849

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Enhanced Dielectric Loss via Six‐Coordinated Er Single Atoms on Porous Carbon Nanofibers for High‐Performance Electromagnetic Wave Absorption DOI Open Access
Hongyi Xu, Minjie Liu, Le‐Tian Huang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract The metal single‐atoms (M‐SAs) have shown enhanced electromagnetic wave absorption performances. However, the relationship between their coordination number with non‐metal atoms and property is still blurry. Here, erbium (Er‐SAs) coordinated six nitrogen on one‐dimensional (1D) nitrogen‐doped hollow carbon nanofibers (HCNF‐Er) are presented for high‐performance absorption. Density functional theory (DFT) calculations experimental results reveal that Er─N 6 configuration D h symmetry significantly enhances both conduction polarization losses of HCNF support, outperforming four‐coordinated M‐SAs 4 symmetry. It also found abundant porosity increases surface area, optimizing impedance matching enhancing lightweight HCNF‐Er. Consequently, HCNF‐Er‐based film shows a wide effective bandwidth (EAB) 6.0 GHz. Furthermore, exhibits excellent flexibility, thermal insulation, mechanical strength. This study offers comprehensive optimization configurations absorption, emphasizing its potential scalable applications.

Язык: Английский

Процитировано

0
The C@FeCo Coaxial Composite Fibers with Enhanced Interface Polarization and Magnetic Response toward Outstanding Electromagnetic Wave Absorption DOI

Fulin Liang,

Lichao Zou,

Chao Peng

и другие.

Carbon, Год журнала: 2025, Номер unknown, С. 120271 - 120271

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
High‐Coordination Engineering of Asymmetrical Cerium Single‐Atoms for Advanced Electromagnetic Wave Absorption DOI
Yanan Shi, Xiaoli Zhang, Minjie Liu

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 2, 2025

Abstract Electromagnetic wave (EMW) absorbers are critical for addressing electromagnetic pollution and enabling stealth technologies. While metal single‐atom (M‐SA) materials have shown potential EMW absorption, their dielectric performance is often constrained by symmetric low‐coordination configurations. In this study, a thiourea‐mediated pyrolysis strategy developed to construct cerium single‐atoms with asymmetric high‐coordination environments (CeN 4 O S 1.5 ). Through combination of density functional theory calculations experimental validation, it found that the Ce‐SAs can induce more metal‐nonmetal dipoles create novel nonmetal‐nonmetal compared M‐N configurations, which significantly enhance loss absorption capabilities. Additionally, CeN ‐based film exhibits 6.8 GHz effective bandwidth at mere 2.3 mm thickness, alongside excellent multifunctional properties such as flexibility, thermal insulation, flame retardancy. This work advances understanding coordination environment's impact on provides an efficient design next‐generation absorbers.

Язык: Английский

Процитировано

0
Enhanced electromagnetic wave absorption performance of LaFeO3 in-situ grown on Co/C with optimized impedance matching DOI
Fengping Hu, Jing Li, Xiaoling Peng

и другие.

Materials Science and Engineering B, Год журнала: 2025, Номер 318, С. 118281 - 118281

Опубликована: Апрель 11, 2025

Язык: Английский

Процитировано

0
Regulating Growth Kinetics of Carbon Nanotubes Toward Efficient Microwave Absorption DOI Open Access
Yi Yan, Jintang Zhou, Jiaqi Tao

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Carbon nanotubes (CNTs) show great promise for microwave absorption (MA) due to their excellent electrical conductivity and lightweight properties, which are conferred by the one dimensional hollow tubular structure. However, ambiguous intrinsic motivations behind formation of CNTs intricate growth processes have resulted in a lack systematic methodology precisely controlling electromagnetic properties. Herein, flexible regulation strategy is designed develop, with core focus being directional carbon atoms differential catalysis metal sources. By improving kinetics, material achieves effective impedance matching attenuation, displaying notable magnetoelectric coupling effects. In particular, COMSOL simulations reveal enhanced dielectric loss contributing efficient energy conversion. Ultimately, demonstrates minimum reflection (RL

Язык: Английский

Процитировано

3