Journal of Magnetism and Magnetic Materials, Journal Year: 2024, Volume and Issue: 591, P. 171730 - 171730
Published: Jan. 11, 2024
Language: Английский
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: March 7, 2024
Abstract Promoting advanced functional films that integrate protective behaviors for synergetic radar, infrared (IR), and visible light is confronted with extreme challenges. The effective integration of shielding capacity IR camouflage into single‐component carbon remains an enormous challenge because limited conductivity high absorption. In this work, nanotube (CNT) excellent electromagnetic interference (EMI) shielding, switchable camouflage, energy conversion are obtained via a (FCCVD) method subsequent defect engineering strategies induced by temperature (Strategy I) N/S co‐doping II). Wherein the effect on electronic configuration as well multi‐spectra performance deeply explored. Ascribing to synergistic effects strategies, defective CNT present superior EMI effectiveness (SE) absorption ratio 86.9%, large span emissivity (0.479), which provides necessary condition various application scenarios. Under applied electric field excitation, radiation can adapt rapidly changing surroundings, such low‐high/high‐low temperatures. Besides, desirable de‐icing be achieved. This work supplies feasible strategy designing EM absorption, adaptive confront multiband surveillance.
Language: Английский
Citations
114
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)
Published: May 21, 2024
Abstract Anion defect engineering is proven to be an efficient approach reconstruct the electronic configuration of carbon‐based magnetoelectric materials for targeted modulation electromagnetic (EM) performance. However, traditional mono‐anionic doping suffers from low concentration and lacks diverse polarization mechanisms. In this work, multi‐anions (N/S/F) stepwise‐doped carbon/Fe 3 C composites are elaborately constructed, wherein predesigned N defects serve as activated sites anomalously adopting S anions (Step I) subsequent F II) in non‐marginal areas carbon layer. It found that prefers replace pyrrolic while tends form dangling bonds with site adjacent pyridinic N. Intriguingly, besides inherent polarized resonance at ≈15 GHz, customized induce new resonances ≈10 GHz ≈15+ respectively. Under a typical multi‐polarization effect synergetic magnetic response, N/S/F harvest broadest bandwidth 8.28 (9.72–18 GHz) 2.55 mm, covering wide frequency range almost X Ku bands. This work demonstrates positive impact localized multi‐defects customization on expanding microwave absorption bandwidth, providing valuable insights advanced design ultra‐broadband absorbers.
Language: Английский
Citations
102
Carbon, Journal Year: 2024, Volume and Issue: 221, P. 118925 - 118925
Published: Feb. 10, 2024
Language: Английский
Citations
93
Carbon, Journal Year: 2024, Volume and Issue: 226, P. 119215 - 119215
Published: May 4, 2024
Language: Английский
Citations
71
Advanced Science, Journal Year: 2024, Volume and Issue: 11(19)
Published: March 14, 2024
Abstract Improving interface connectivity of magnetic nanoparticles in carbon aerogels is crucial, yet challenging for assembling lightweight, elastic, high‐performance, and multifunctional architectures. Here, an situ growth strategy to achieve high dispersion metal–organic frameworks (MOFs)‐anchored cellulose nanofibrils enhance the connection quality proposed. Followed by a facile freeze‐casting carbonization treatment, sustainable biomimetic porous with highly dispersed closely connected MOF‐derived nano‐capsules are fabricated. Thanks tight bonding nano‐capsule microstructure, these showcase remarkable mechanical robustness flexibility, tunable electrical conductivity magnetization intensity, excellent electromagnetic wave absorption performance. Achieving reflection loss −70.8 dB broadened effective bandwidth 6.0 GHz at filling fraction merely 2.2 wt.%, leading specific −1450 mm −1 , surpassing all carbon‐based aerogel absorbers so far reported. Meanwhile, manifests sensing sensibility thermal insulation. This work provides extendable synthesizing MOF‐modified nanofibril structures, thereby promoting development high‐value‐added applications compatibility protection, management, diversified sensing, Internet Things devices, aerospace.
Language: Английский
Citations
69
Advances in Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 327, P. 103143 - 103143
Published: April 4, 2024
Language: Английский
Citations
67
Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)
Published: April 22, 2024
Abstract The utilization of electromagnetic waves is rapidly advancing into the millimeter-wave frequency range, posing increasingly severe challenges in terms pollution prevention and radar stealth. However, existing absorbers are still inadequate addressing these issues due to their monotonous magnetic resonance pattern. In this work, rare-earth La 3+ non-magnetic Zr 4+ ions simultaneously incorporated M-type barium ferrite (BaM) intentionally manipulate multi-magnetic behavior. By leveraging contrary impact on magnetocrystalline anisotropy field, restrictive relationship between intensity successfully eliminated. peak-differentiating imitating results confirm that significant phenomenon emerges around 35 GHz reinforced exchange coupling effect Fe 2+ ions. Additionally, Mössbauer spectra analysis, first-principle calculations, least square fitting collectively identify additional doping leads a profound rearrangement occupation thus makes portion polarization/conduction loss increase gradually. As consequence, –Zr co-doped BaM achieves an ultra-broad bandwidth 12.5 + covering from 27.5 40 GHz, which holds remarkable potential for atmospheric window GHz.
Language: Английский
Citations
58
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Feb. 5, 2024
Abstract The emergence and widespread adoption of fifth‐generation wireless technology in civilian sectors have advanced the information revolution, while simultaneously leading to a variety negative impacts. Foremost issues domain include electromagnetic (EM) pollution, interference, inefficient use EM energy. Despite growing global awareness, progress devising effective solutions is sluggish, underlining complexity these issues. delay addressing concerns arises from several factors, including considerable gap comprehensive understanding absence unified stance on critical Moreover, new challenges like interference energy inefficiency indicates clear need for innovative ideas approaches. Addressing extends beyond inherent properties absorbers, requiring combination tailored macro‐structural designs external field management solution. This situation emphasizes urgent diverse strategies creative thinking navigate posed by perspective underscores identified systematically proposes practical approaches each, aiming foster both conversation action this crucial area. insights provided are expected substantially aid confronting alleviating pressing concerns.
Language: Английский
Citations
44
Carbon, Journal Year: 2024, Volume and Issue: 223, P. 119017 - 119017
Published: March 4, 2024
Language: Английский
Citations
41
Materials Today Physics, Journal Year: 2024, Volume and Issue: 41, P. 101355 - 101355
Published: Feb. 1, 2024
Language: Английский
Citations
29