Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
A new structure of the SiC/C aerogel with ultra-broadband EMW absorption was designed, and C-band peak originated from carbon component, while X- Ku-band peaks were attributed to SiC.
Language: Английский
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 24, 2025
Abstract The regulation of heteroatoms and heterogeneous interface characteristics has emerged as a promising strategy to enhance electromagnetic wave (EMW) absorption. However, challenges remain in precisely controlling heteroatom doping fully understanding the synergistic mechanisms between interfaces. Here, novel is proposed for enhancing polarization relaxation through optimization. Carbon nanofiber (CNF)‐based Ni–Fe nanocubes decorated with N O are synthesized by pyrolyzing Fe‐based metal–organic frameworks under different atmospheres (NH 3 , H 2 /Ar, Ar). results show that N, play crucial role effect regulating electronic structure diverse structures. Finally, Fe N@Ni Fe/CNFs exhibit excellent EMW absorption at 2.3 mm, minimum reflection loss −56.75 dB, an effective bandwidth 6.7 GHz. Additionally, these materials display remarkable corrosion resistance due their unique fiber network structure. This study highlights optimizing effects, offering valuable insights design advanced heteroatom‐optimized heterointerfaces.
Language: Английский
Citations
15
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 5, 2025
Abstract Electronic devices are becoming portable, miniaturized, and high performance, more widely used in emerging complex fields. Electromagnetic functional materials with multiple functions that can be applied to scenarios urgently need developed. This research assembled a multifunctional magnetic heterodimensional structure through interface defect engineering, conceived an innovative hybrid energy storage device antenna. The exhibits excellent microwave absorption, electromagnetic interference (EMI) shielding properties. minimum reflection loss is −57.06 dB at 6.16 GHz, the optimal EMI effectiveness 74.08 18 GHz. At current densities of 0.5 3 A g −1 , discharge/charge specific capacities remain 836.64/820.48 401.4/401.7 mAh after 300 500 cycles, respectively. Hybrid convert into electrical for storage. antenna shows harvesting characteristic S, C, X, Ku multi‐bands. |S 11 | reach −65.6 tuned by adjusting dielectric substrate thickness. work will furnish new prospects design development scenarios.
Language: Английский
Citations
5
Small, Journal Year: 2025, Volume and Issue: unknown
Published: April 1, 2025
Abstract The modulation of transport properties in ceramic‐based semiconductors can be used to optimize the electromagnetic response mechanism and performance. A semiconductor ceramic foam interlayer wall (SCFW) is designed by a physical vapor deposition method. structural SCFW composed semiconductor‐insulator‐semiconductor layers, incorporating composite system SiC, Al 4.8 Si 1.2 O 9.6 , 2 3 . Moreover, hierarchical network structure controlled pyrolysis‐deposition kinetic process. Electrons holes are transported through heterojunctions between SiC achieving effective charge relaxation. matrix provides lightweight (density 0.967 g cm −3 ), while determines excellent wave (EMW) absorption performance SCFW, with an bandwidth up 14.8 GHz under (minimum reflection loss RL min = −50.6 dB). has been proven exhibit corrosion resistance thermal insulation properties, conductivity 0.025 W m −1 K This study valuable insights into design dielectric property optimization nanocomposites, which leads strong polarization loss, opening new avenues for application EMW absorbers, ceramics.
Language: Английский
Citations
2
Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Multiscale synergy strategies offer promising solutions for future multi-frequency electromagnetic pollution.
Language: Английский
Citations
1
Journal of Materials Science Materials in Electronics, Journal Year: 2025, Volume and Issue: 36(2)
Published: Jan. 1, 2025
Language: Английский
Citations
0
Small Methods, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 10, 2025
Abstract The continuous advancement of electronic devices, driven by trends toward miniaturization, reduced weight, higher integration, and multifunctionality, imposes stringent requirements on the performance electromagnetic wave (EMW) absorbing materials. Traditional EMW absorbers, such as metals, face significant drawbacks, including high density rigidity, which limit their broader application in absorption. To overcome these issues, cellulose is employed matrix, incorporating nickel ferrite (NiFe 2 O 4 ) nanocrystals carbon nanotubes (CNTs) functional fillers. ferrite/CNT/cellulose aerogels (NCCAs) are fabricated through ionic crosslinking room‐temperature drying techniques. results show that porous structure NCCA enhances multiple scattering energy dissipation pathways for EMWs, while CNTs provide excellent electrical dissipation. content NiFe strongly influences aerogel's saturation magnetization parameters NCCAs, primarily owing to superior dielectric magnetic loss properties. Notably, when 4% mass, achieves lowest reflection −66.53 dB at 16.11 GHz, lower than most reported ferrite‐based absorbers. This work provides valuable insights guidance design novel aerogel‐based absorbers with lightweight properties, strong absorption intensities, broad frequency bands.
Language: Английский
Citations
0
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 20, 2025
Language: Английский
Citations
0
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 20, 2025
Language: Английский
Citations
0
Small, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 21, 2025
Aerogels with porous structures offer an attractive approach to modulating electromagnetic parameters and enhancing wave (EMW) absorption performance. However, conventional aerogels are limited by their single-scale pore size fixed orientation, which constrain EMW capabilities. This study introduces dual-scale pores dual-network structure constructed via constant-temperature freezing secondary-infusion method. Multiscale both micrometer- submillimeter-scale when the Ti3C2Tx MXene thermoplastic polyurethane solution is frozen dried at a specific temperature, leading ultra-wide effective bandwidth (EAB) reaching 10.41 GHz in vertical direction. Furthermore, address poor parallel direction, secondary infusion method applied form aerogel structure, forms reflective interfaces perpendicular incident various directions. adjustment enhances EAB direction from 1.58 5.93 GHz, marking 275.32% enhancement, while reaches 8.08 GHz. design strategy overcomes limitations of structural scale arrangement enriching attenuation mechanisms absorber, effectively reducing sensitivity incoming EMW, offering new insights for designing efficient absorbers.
Language: Английский
Citations
0
Materials Today Physics, Journal Year: 2025, Volume and Issue: 52, P. 101696 - 101696
Published: March 1, 2025
Language: Английский
Citations
0