Applied Catalysis A General, Journal Year: 2024, Volume and Issue: 677, P. 119710 - 119710
Published: March 28, 2024
Language: Английский
Carbon, Journal Year: 2024, Volume and Issue: 227, P. 119244 - 119244
Published: May 13, 2024
Electromagnetic waves constitute an essential element of societal progress, and the environmental impact resulting from using electromagnetic warrants significant considerations. Carbon materials have garnered considerable attention in functional domain owing to their remarkable electrical conductivity dielectric characteristics. Notably, spherical carbon materials, characterized by substantial specific surface area tunable properties, emerged as efficient additives for microwave absorbers. These excel absorbing energy while minimizing dissipation. When incorporated into absorbers varying compositions, sizes, morphologies, these spheres facilitate synergistic operation multiple loss mechanisms, containing conductive loss, magnetic polarization loss. This concerted action significantly enhances wave absorption performance. paper offers a comprehensive review advancements sphere-based designed waves. It also furnishes intricate exposition methodologies employed preparation meticulous analysis The summarizes microstructural attributes mechanisms governing various sphere configurations, considering factors such composition, morphology, size, structure. In conclusion, this study forecasts potentials nanomaterials realm waves, along with assessment forthcoming research focal points conceivable challenges.
Language: Английский
Citations
49
Carbon, Journal Year: 2023, Volume and Issue: 218, P. 118735 - 118735
Published: Dec. 15, 2023
Language: Английский
Citations
42
Small, Journal Year: 2024, Volume and Issue: 20(20)
Published: Jan. 11, 2024
Abstract This study addresses the challenge of designing simple and environmentally friendly methods for preparation effective electromagnetic wave (EMW) absorbing materials with tailored microstructures multi‐component regulation. N, O doped walnut‐like porous carbon composite microspheres loaded FeCo nanoparticles (WPCM/Fe–Co) are synthesized through high‐temperature carbonization combined soap‐free emulsion polymerization hydrothermal methods, avoiding use toxic solvents complex conditions. The incorporation magnetic components enhances loss, complementing dielectric loss to optimize EMW attenuation. unique morphology further improves impedance matching. proportions Fe Co can be adjusted regulate material's reflection thickness, bandwidth, allowing fine‐tuning absorption performance. At a low filling ratio (16.7%), optimal WPCM/Fe–Co composites exhibit minimum ( RL min ) −48.34 dB (10.33 GHz, 3.0 mm) an overall bandwidth (EAB) covering entire C bands, X Ku bands. work introduces novel approach composition regulation presents green synthesis method absorbers high‐performance at loading.
Language: Английский
Citations
38
Advanced Fiber Materials, Journal Year: 2024, Volume and Issue: 6(2), P. 430 - 443
Published: Jan. 30, 2024
Language: Английский
Citations
37
Carbon, Journal Year: 2024, Volume and Issue: 228, P. 119338 - 119338
Published: June 13, 2024
Language: Английский
Citations
37
Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)
Published: Sept. 26, 2024
Abstract Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic physicochemical property of electromagnetic wave absorption (EMWA) materials. However, relationship between configuration (EM) loss mechanism has remained elusive. Herein, drawing inspiration from DNA transcription process, we report successful synthesis novel situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA capability. Theoretical calculation EM simulation confirm that orbital coupling spin polarization Mn–N 4 –C configuration, along cross generated by structure, endow converters enhanced loss. As a result, HMC-8 demonstrates outstanding performance, achieving minimum reflection −63.13 dB at an ultralow thickness 1.29 mm. Through precise tuning graphite domain size, HMC-7 achieves effective bandwidth (EAB) 6.08 GHz 2.02 mm thickness. Furthermore, constructing macroscale gradient metamaterials enables ultrabroadband EAB 12.16 only 5.00 mm, maximum radar section reduction value reaching 36.4 m 2 . This innovative approach not advances understanding metal–nonmetal co-doping but also realizes broadband EMWA, thus contributing to development mechanisms applications.
Language: Английский
Citations
34
Carbon, Journal Year: 2024, Volume and Issue: 227, P. 119267 - 119267
Published: May 21, 2024
Language: Английский
Citations
16
Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(17)
Published: Dec. 27, 2023
Abstract Within the nanoscale, methodically reconfiguring interface charges, and leveraging this newly structured to modify energy‐momentum dynamics of heterojunction energy bands, hold profound implications for microwave electronics because intensified interaction between external microwaves interfaces materials. Mastering orderly reconstruction contingent upon precise control over composition, orientation, electronic structure remains a challenge at scale. Herein, an in situ hierarchical assembly approach is used successively deposit layers Cu 2 S, C, MoS on hollow cubic framework with thickness 20 nm. Additionally, by harnessing quasi‐graphitic characteristics elevated work function graphitized carbon middle layer, its inherent charge steered toward both outer inner layers, establishing configuration crafted S@C C@MoS interfaces. Employing advanced off‐axis electron holography, dielectric measurements, first‐principle calculations, dynamic charges resulting response ascertained. The synergistic effect revealed that S@C@MoS materials exhibited exceptional absorption, effective absorption band covering 7.03 GHz 2.0 mm thickness. Furthermore, nano‐interfaces paves way research into novel electromagnetic protection their unique behaviors.
Language: Английский
Citations
30
Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 177, P. 224 - 233
Published: Sept. 29, 2023
Language: Английский
Citations
24
ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(17), P. 15347 - 15366
Published: Aug. 26, 2023
Following the growth of infotech and electronic industries, electromagnetic-wave-absorbing materials play an essential role in traction need for high-precision weaponry intelligent equipment. The exploitation high-performance has emerged as a strategic challenge to be solved upgrading military equipment civil electromagnetic security. more maturely studied absorbing (carbon, ferrite, etc.) have single loss mechanism poor resistance matching, which are already not enough cover basic needs. To explore that satisfy both impedance matching attenuation balance, dielectric nanomaterials come fore. They can realize light weight, thin layer, broad band, multiband, great application prospects. In this review, we start with summary typical mechanisms (interfacial polarization, dipole conduction loss). Next, diverse carbides, oxides, sulfides, their composites or magnetic described, nanostructure advantages wave-absorbing performance investigated. Then, applications depicted. Lastly, challenges faced by dielectric-type outlined, future development trends foreseen. Overall, review offers overview advances study nanoabsorbing materials.
Language: Английский
Citations
23