Hierarchical Fe-Co@TiO2 with Incoherent Heterointerfaces and Gradient Magnetic Domains for Electromagnetic Wave Absorption DOI
Panbo Liu,

Yurou Li,

Hanxiao Xu

и другие.

ACS Nano, Год журнала: 2023, Номер 18(1), С. 560 - 570

Опубликована: Дек. 18, 2023

Induced polarization response and integrated magnetic resonance show prosperous advantages in boosting electromagnetic wave absorption but still face huge challenges revealing the intrinsic mechanism. In this work, we propose a self-confined strategy to construct hierarchical Fe-Co@TiO2 microrods with numerous incoherent heterointerfaces gradient domains. The results demonstrate that use of polyvinylpyrrolidone (PVP) coating is crucial for subsequent deposition Co-zeolitic imidazolate frameworks (ZIF-67), distance ordered arranged metal ions manipulates size domains, pyrolysis PVP layers restricts eutectic process Fe-Co alloys some extent. As result, these introduced lattice defects, oxygen vacancies, inevitably generate strong response, regulated domains realize resonance, including macroscopic coupling, long-range diffraction, nanoscale bridge connection, both mechanisms dissipating energy are quantitatively clarified by Lorentz off-axis electron holography. Owing cooperative merits, absorbents exhibit enhanced intensity bandwidth. This study inspires us develop generalized manipulating theory provides versatile methodology clarifying loss

Язык: Английский

Electromagnetic absorption materials: Current progress and new frontiers DOI
Hualiang Lv, Zhihong Yang, Hongge Pan

и другие.

Progress in Materials Science, Год журнала: 2022, Номер 127, С. 100946 - 100946

Опубликована: Март 17, 2022

Язык: Английский

Процитировано

532

Broadband multispectral compatible absorbers for radar, infrared and visible stealth application DOI
Yue Wu,

Shujuan Tan,

Yue Zhao

и другие.

Progress in Materials Science, Год журнала: 2023, Номер 135, С. 101088 - 101088

Опубликована: Фев. 4, 2023

Язык: Английский

Процитировано

339

Structural Defects in Phase‐Regulated High‐Entropy Oxides toward Superior Microwave Absorption Properties DOI

Biao Zhao,

Yiqian Du,

Zhikan Yan

и другие.

Advanced Functional Materials, Год журнала: 2022, Номер 33(1)

Опубликована: Окт. 27, 2022

Abstract High‐entropy (HE) oxides have become increasingly popular as electromagnetic wave‐absorbing materials owing to their customizable structure and unique HE effects. However, the weak loss property of single‐phase ceramics approaches implemented improve them based on semi‐empirical rules severely limit development. Herein, two biphasic are prepared by simple sintering realize accurate regulation crystal phases structural defects. It is verified that effects cause various defects beneficial for microwave dissipation within complex‐phase ceramics. In spinel/perovskite oxides, around interface spinel (111) perovskite (110) planes, notable stress concentrations lattice distortions directly observed, inducing numerous point stacking faults. Interestingly, besides existing heterogeneous rock salt (220)/spinel (220) plane defects, salt/spinel enabled synergistic via precise components’ phase. Driven multi‐phases in complexes, intense polarization evidently found, confirmed first‐principles calculations. Accordingly, demonstrate excellent absorption performance, minimal reflection −54.5 dB achieved. Therefore, this study provides valuable guidelines design absorbers using oxides.

Язык: Английский

Процитировано

333

Ultrabroad Microwave Absorption Ability and Infrared Stealth Property of Nano-Micro CuS@rGO Lightweight Aerogels DOI Creative Commons
Yue Wu, Yue Zhao, Ming Zhou

и другие.

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Авг. 20, 2022

Developing ultrabroad radar-infrared compatible stealth materials has turned into a research hotspot, which is still problem to be solved. Herein, the copper sulfide wrapped by reduced graphene oxide obtain three-dimensional (3D) porous network composite aerogels (CuS@rGO) were synthesized via thermal reduction ways (hydrothermal, ascorbic acid reduction) and freeze-drying strategy. It was discovered that phase components (rGO CuS phases) micro/nano structure (microporous nanosheet) well-modified modulating additive amounts of changing ways, resulted in variation pore structure, defects, complex permittivity, microwave absorption, radar cross section (RCS) value infrared (IR) emissivity. Notably, obtained CuS@rGO with single dielectric loss type can achieve an bandwidth 8.44 GHz at 2.8 mm low filler content 6 wt% hydrothermal method. Besides, aerogel realizes minimum reflection (RLmin) - 60.3 dB lower 2 wt%. The RCS reach 53.3 m2, effectively reduces probability target being detected detector. Furthermore, laminated architecture multicomponent endowed insulation IR versatility. Thus, this work offers facile method design develop rGO-based absorbers radar-IR stealth.

Язык: Английский

Процитировано

332

Hierarchical Engineering of Double‐Shelled Nanotubes toward Hetero‐Interfaces Induced Polarization and Microscale Magnetic Interaction DOI
Panbo Liu, Yi Wang, Guozheng Zhang

и другие.

Advanced Functional Materials, Год журнала: 2022, Номер 32(33)

Опубликована: Июнь 1, 2022

Abstract Hierarchical engineering of suitable dielectric‐magnetic multicomponents shows good performance for microwave absorbers, but still face bottlenecks. Herein, hierarchical double‐shelled nanotubes (DSNTs), in which the inner magnetic tubular subunits are assembled by magnetic‐heteroatomic components through cation‐exchange reactions, and outer dielectric MnO 2 nanosheets strengthen synergistic interactions between confined heterogeneous interfaces ingeniously designed constructed. Hetero‐interfaces induced polarization is proposed to investigate interfacial relaxation mechanism, loss, closely related micrometer‐scale units, mainly clarified interaction composed coupling diffraction; both them clearly confirmed Lorentz off‐axis electron holography. The obtained DSNTs demonstrate efficient absorption with an optimal reflection loss −54.7 dB qualified bandwidth 9.5 GHz owing desirable interfaces, multiple heteroatomic hollow microstructures. This strategy inspires a generalized methodology configurations multishells, combination hetero‐interfaces microscale broadens mechanism topography–performance relationship materials.

Язык: Английский

Процитировано

302

Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth DOI Creative Commons
Haoran Cheng, Yamin Pan, Xin Wang

и другие.

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Фев. 21, 2022

The development of multifunctional and efficient electromagnetic wave absorbing materials is a challenging research hotspot. Here, the magnetized Ni flower/MXene hybrids are successfully assembled on surface melamine foam (MF) through electrostatic self-assembly dip-coating adsorption process, realizing integration microwave absorption, infrared stealth, flame retardant. Remarkably, Ni/MXene-MF achieves minimum reflection loss (RLmin) - 62.7 dB with corresponding effective absorption bandwidth (EAB) 6.24 GHz at 2 mm an EAB 6.88 1.8 mm. Strong attributed to three-dimensional magnetic/conductive networks, which provided excellent impedance matching, dielectric loss, magnetic interface polarization, multiple attenuations. In addition, endows low density, heat insulation, flame-retardant functions. This work new strategy for design materials.

Язык: Английский

Процитировано

275

One-Dimensional Magnetic FeCoNi Alloy Toward Low-Frequency Electromagnetic Wave Absorption DOI Creative Commons

Bintong Yang,

Jiefeng Fang,

Chunyang Xu

и другие.

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Авг. 20, 2022

Rational designing of one-dimensional (1D) magnetic alloy to facilitate electromagnetic (EM) wave attenuation capability in low-frequency (2-6 GHz) microwave absorption field is highly desired but remains a significant challenge. In this study, composite EM absorber made FeCoNi medium-entropy embedded 1D carbon matrix framework rationally designed through an improved electrospinning method. The 1D-shaped demonstrates the high-density and continuous network using off-axis electronic holography technique, indicating excellent loss ability under external field. Then, in-depth analysis shows that many factors, including anisotropy intrinsic physical features alloy, primarily contribute enhanced performance. Therefore, fabricated increasing effective band 1.3 GHz at ultrathin thickness 2 mm. Thus, study opens up new method for design preparation high-performance absorbers.

Язык: Английский

Процитировано

264

Confined Diffusion Strategy for Customizing Magnetic Coupling Spaces to Enhance Low‐frequency Electromagnetic Wave Absorption DOI
Longjun Rao, Lei Wang,

Chendi Yang

и другие.

Advanced Functional Materials, Год журнала: 2023, Номер 33(16)

Опубликована: Фев. 7, 2023

Abstract The rational design of magnetic composites has great potential for electromagnetic (EM) absorption, particularly in the low‐frequency range 2–8 GHz. However, scalable synthesis such absorbers with both high content and good dispersity remains challenging. In this study, a confined diffusion strategy is proposed to fabricate functional magnetic‐carbon hollow microspheres. Driven by ferromagnetic enhanced Kirkendall effect, situ alloying FeCo nanoparticles tightly carbon shells, effectively inhibiting agglomeration. Moreover, core–shell FeCo–carbon nano‐units further assemble into dispersive microscale Janus bulges on inner outer surfaces microsphere. optimized FeCo@C microspheres exhibit excellent EM wave absorption performance: minimum reflection loss ( RL min ) −35.9 dB, bandwidth covers almost entire C‐band. Systematic investigation reveals that large size integration, high–density units, strong coupling are essential enhancing dissipation waves. This study provides novel fabricating advanced significant inspiration investigating attenuation mechanism at low frequency.

Язык: Английский

Процитировано

263

Ultralight Magnetic and Dielectric Aerogels Achieved by Metal–Organic Framework Initiated Gelation of Graphene Oxide for Enhanced Microwave Absorption DOI Creative Commons
Xiaogu Huang,

Jiawen Wei,

Yunke Zhang

и другие.

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Апрель 19, 2022

Metal-organic frameworks (MOFs) are used to directly initiate the gelation of graphene oxide (GO), producing MOF/rGO aerogels. The ultralight magnetic and dielectric aerogels show remarkable microwave absorption performance with ultralow filling contents. development a convenient methodology for synthesizing hierarchically porous comprising metal-organic (GO) building blocks that exhibit an density uniformly distributed MOFs on GO sheets is important various applications. Herein, we report facile route MOF/reduced (rGO) based GO, which initiated using MOF crystals. Free metal ions exposed surface MIL-88A nanorods act as linkers bind nanosheets three-dimensional network via metal-oxygen covalent or electrostatic interactions. MOF/rGO-derived Fe3O4@C/rGO Ni-doped notable (MA) performance, simultaneously achieving strong broad bandwidth at low thickness 2.5 (- 58.1 dB 6.48 GHz) 2.8 mm 46.2 7.92 contents 0.7 0.6 wt%, respectively. attenuation ability prepared further confirmed radar cross-sectional simulation, attributed synergistic effects their structures heterointerface engineering. This work provides effective pathway fabricating hybrid offers MA.

Язык: Английский

Процитировано

231

Hollow engineering of sandwich NC@Co/NC@MnO2 composites toward strong wideband electromagnetic wave attenuation DOI
Chenhao Wei,

Lingzi Shi,

Maoqing Li

и другие.

Journal of Material Science and Technology, Год журнала: 2023, Номер 175, С. 194 - 203

Опубликована: Сен. 6, 2023

Язык: Английский

Процитировано

222