Journal of Materials Science Materials in Electronics, Journal Year: 2024, Volume and Issue: 35(20)
Published: July 1, 2024
Language: Английский
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 501, P. 157556 - 157556
Published: Nov. 16, 2024
Language: Английский
Citations
20
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 5, 2025
Abstract Metal‐organic framework (MOF) derivatives employed as novel microwave‐absorbing materials (MAMs) have garnered significant attention due to their diverse in situ or ex coordinated components and the flexibility nano‐microstructure fabrication. A well‐designed heterointerface can provide an optimal balance between impedance high‐loss capability. However, precisely tuning semiconductor‐metal‐carbon heterostructures remains a huge challenge. Herein, multi‐component NiS/Co 3 S 4 /NiCo@CNTs/NC nanohybrid with hollow structure is elaborately fabricated using convenient solvothermal method followed by high‐temperature pyrolysis, forming unique heterostructure multiple Schottky contacts. This demonstrates remarkable reflection loss value of −75.9 dB at thickness 2.6 mm. The transcendent microwave absorption (MA) capacity primarily attributed intense polarization relaxation process superb impedance‐matching properties semiconductor/metal/carbon hybrid barriers. In addition, built‐in electric field established heterointerfaces increases electron transport capabilities. Notably, controllable introduction numerous defects into carbon layer intensifies interfacial effect nanohybrid. study offers innovative insights mechanisms development high‐performance MAMs.
Language: Английский
Citations
20
Small, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 5, 2025
Cellulose aerogels, as a novel class of carbon-based materials, exhibit immense potential in the field microwave absorption (MWA) due to their biocompatibility, low density, unique porous structure, and tunable architecture. However, development multi-dimensional components with specialized heterogeneous structures, which are based on cellulose remains significant challenge. This 0D/1D/3D structural configuration facilitates electromagnetic properties favorable impedance matching. The Schottky contact at ZnO/Ni interface, particular, induces strong interfacial polarization, design results multiple heterointerfaces. Density functional theory (DFT) calculations reveal that barrier causes band bending, facilitating directed migration electrons interface formation an internal electric field, thus significantly accelerating multipolar relaxation process. As anticipated, CCMC/ZnO@Ni aerogel exhibits minimum reflection loss (RLmin) value -64.0 dB 13.9 GHz thickness 2.0 mm, its effective bandwidth (EAB) reaches 4.9 GHz. work gives valuable guidance inspiration for materials composed dimensional gradient holds great application wave (EMW) attenuation.
Language: Английский
Citations
12
Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 671, P. 56 - 66
Published: May 22, 2024
Language: Английский
Citations
17
Small, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Abstract Anion doping engineering is recognized as a prospective strategy to adjust the electronic configuration and transport capacity of carbon‐based magnetoelectric hybrids optimize defects for modulation electromagnetic (EM) properties. This study effectively accomplishes an overwhelming enhancement in dielectric coupling between conduction polarization CuCo bimetallic/carbon system by employing situ (N, O)/ex (S, Se) defect strategies. The well‐designed lattice distortions are facilitated large atomic radii (Se) intercalated carbon skeleton bimetallic CuCo, which activate reinforcement dipole high‐frequency region. Interestingly, appropriate number vacancies acts “electron traps” accelerate local charge redistribution, endowing with extremely strong interactions interface‐induced polarization. It remarkable that ultra‐thin feature (1.8 mm) able achieve extraordinary microwave attenuation (‒56.1 dB). Additionally, specific upgrading anionic Se beneficially hinders development phonon transmission, conferring Cu 2 Se/CoSe /NC‐Se aerogel outstanding infrared stealth capabilities along inheriting advantages traditional (lightness, compressive/structural stability, hydrophobicity/anti‐corrosive properties). research offers distinctive perspectives on advanced design multifunctional absorbers complex environments.
Language: Английский
Citations
16
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156696 - 156696
Published: Oct. 13, 2024
Language: Английский
Citations
13
ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(16), P. 19427 - 19438
Published: July 31, 2024
To meet the demands for high-performance and cost-effective electromagnetic wave absorbers in practical applications, CoNi alloy/N-doped hollow carbon foam (CoNi/NCF) was synthesized using melamine as a precursor through hydrothermal reaction. By introduction of appropriate alloys to form uniform magnetic metal nanoparticles on surface NCF, absorption performance NCF can be adjusted. These formed rich heterogeneous interfaces with enhancing interface polarization loss composite material waves. The alloy increased conductivity materials, which conducive formation three-dimensional conductive network promoted conduction As metal, also brought losses increasing ways consume Additionally, doping N atoms dipole NCF. minimum reflection (RLmin) CoNi/NCF reached −47.35 dB, maximum effective bandwidth (EAB) 5.6 GHz (2.4 mm). effectively reduced radar cross-section (RCS) signal electric conductor layer. This study provides feasible strategy developing materials an efficient performance.
Language: Английский
Citations
9
ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(16), P. 19688 - 19697
Published: Aug. 8, 2024
Graphene has been widely used in the field of electromagnetic wave (EMW) absorption because it many excellent properties, such as electrical conductivity, large specific surface area, and good mechanical properties. However, high conductivity single loss mechanism lead to poor impedance matching microwave performance. Herein, we developed a strategy introduce g-C3N4 nanosheet combine with graphene oxide (GO) enhance heterojunction interfaces, thus bringing abundant interfacial polarization loss. Moreover, excessive electrons on GO can be transferred through electrostatic interaction between layers. And this basis, designed g-C3N4-rGO into an aerogel structure endow material plentiful porous structure, which promotes reflection scattering waves. In addition, parameters are adjusted by controlling weight ratio GO, well calcination temperatures, obtain both absorbing As result, synthesized shows remarkable EMW performance broad effective bandwidth (EAB) 8.08 GHz (RL) −38.08 dB. To sum up, work provides inspiration guidance for designing nanomaterials outstanding
Language: Английский
Citations
7
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1738 - 1748
Published: Jan. 17, 2025
The synthesis of SrFe12O19/MWCNT microwave absorbent nanocomposites was achieved by using a one-pot hydrothermal method, resulting in compounds strontium ferrite nanoplates and multiwalled carbon nanotube (MWCNT). When the mass ratio to MWCNTs is 6:1, SrFe12O19/MWCNTs nanopowder represented most significant reflective loss −33.2 dB at 14.11 GHz while material thickness 1.48 mm. More importantly, reaches an efficacious absorbing bandwidth about 3.96 with 1.35 mm, which could lead relatively low mass, thus demonstrating its potential for utilization as lightweight highly efficient wave-absorbing coating. findings offer valuable reference point subsequent materials.
Language: Английский
Citations
1
ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(22), P. 25970 - 25982
Published: Nov. 12, 2024
Lightweight magnetic-carbon nanocomposites with multiple magnetic components are highly desirable for their efficacy in broadband microwave absorption. However, fabricating such composites rationally designed chemical composites, tailored microstructure, and uniformly distributed remains a grand challenge using conventional carbon precursors. Herein, we report the facile fabrication of porous N-doped (Fe3O4@FeCN) Fe/Fe3C/Fe3O4 nanoparticles conjugated microporous polymers (CMPs) as precursor. CMPs have high specific surface area abundant nanoporosity, facilitating efficient loading iron ions uniform growth inside matrix. Notably, Fe3O4@FeCN-2 demonstrates excellent absorption capabilities minimum reflection loss (RLmin) −49.68 dB wide bandwidth 5.72 GHz at matching thickness only 2.0 mm. This outstanding performance is primarily attributed to synergistic effects significantly improved impedance matching, enhanced polarization loss, introduction through embedded nanoporous Moreover, simulation computer technology (CST), shows reduced radar cross section (RCS), RCS values <−10 covering entire frequency band 2–18 angles 30, 60, 90°, demonstrating its great potential applications systems stealth technology. work will inspire development precursors fabricate lightweight precisely controlled structures high-performance
Language: Английский
Citations
4