Built‐In Electric Field Enhancement Strategy Induced by Cross‐Dimensional Nano‐Heterointerface Design for Electromagnetic Wave Absorption

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 1, 2024

Abstract Nano‐heterointerface engineering has been demonstrated to influence interfacial polarization by expanding the interface surface area and constructing a built‐in electric field (BEF), thus regulating electromagnetic (EM) wave absorption. However, dielectric‐responsive mechanism of BEF needs further exploration enhance comprehensive understanding polarization, particularly in terms quantifying optimizing strength. Herein, “1D expanded 2D structure” carbon matrix is designed, semiconductor ZnIn 2 S 4 (ZIS) introduced construct carbon/ZIS heterostructure. The cross‐dimensional nano‐heterointerface design increases coupling sites induces an increase Fermi level difference on both sides modulate distribution charges, thereby strengthening at interface. synergistic effect leads excellent EM absorption performance (minimum reflection coefficient RC min = −67.4 dB, effective bandwidth EAB 6.0 GHz) This work introduces general modification model for enhancing inspires development new strategies functional materials with unique electronic behaviors through heterointerface engineering.

Language: Английский

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Multiple Schottky Contacts Motivated via Defects to Tune the Response Ability of Electromagnetic Waves

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

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Integrating nitrogen doping with multi-heterogeneous interfaces of NRGO/ZnFe2O4@PPy composite aerogels for efficient and wideband electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159819 - 159819

Published: Jan. 1, 2025

Language: Английский

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Graphite Wrapped FeNi3/Co with Carbon Nanotubes Anchored on MgO@Carbon Fiber Reinforcements via Continuous Fabrication for High-Efficiency Microwave Attenuation

Advanced Fiber Materials, Journal Year: 2024, Volume and Issue: 6(5), P. 1640 - 1656

Published: June 21, 2024

Language: Английский

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MoS₂-Decorated Tubular Carbon Nanostructures with Enhanced Dielectric Loss for Boosting Microwave Absorption

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(14), P. 16075 - 16085

Published: July 5, 2024

The construction of hierarchical structures has been demonstrated to be an effective method for achieving high-performance microwave absorption. In this study, a flower-like MoS2 nanosheet-coated tubular carbon composite with average diameter approximately 560 nm was synthesized via straightforward ion-exchange and pyrolysis strategy. growth nanosheets, the presence heterojunction surfaces, hollow structure collectively enhance dielectric loss material, thereby optimizing absorption properties material. C@MoS2 nanocomposite demonstrates minimum reflection −66.8 dB bandwidth 4.8 GHz when thickness is only 1.6 mm. This work presents synergistic strategy design layered structures.

Language: Английский

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Phenolic multiple kinetics-dynamics and discrete crystallization thermodynamics in amorphous carbon nanostructures for electromagnetic wave absorption

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 28, 2024

The lack of a chemical platform with high spatial dimensional diversity, coupled the elusive multi-scale amorphous physics, significantly hinder advancements in electromagnetic wave absorption (EWA) materials. Herein, we present synergistic engineering phenolic multiple kinetic dynamics and discrete crystallization thermodynamics, to elucidate origin dielectric properties carbon cascade effect during EWA. Leveraging scalability synthesis, design dozens morphologies from bottom up combine in-situ pyrolysis establish nanomaterial ecosystem hundreds Based on controlled crystallization, nano-curvature regulation inversion symmetry-breaking structures, surface electric field enhancement multi-shell charge imbalance triggers intense polarization. Both experiments theories show that each scale is essential, which collectively drives broadband (8.46 GHz) efficient dissipation (−54.77 dB) EWA performance. Our work nanostructure can contribute uncovering missing pieces physics research. This study presents synthesis absorption.

Language: Английский

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Two birds with one stone: Integrating multidimensional heterointerfaces with abundant nitrogen sites for ultrathin broadband microwave absorber

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161603 - 161603

Published: March 1, 2025

Language: Английский

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High-Performance wave loss capability by Constructing Well-Defined hierarchical aerogel framework with strongly coupled Carbon/CeO2 interface

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158873 - 158873

Published: Dec. 1, 2024

Language: Английский

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Metamaterial Absorbers with Archimedean Tiling Structures: Toward Response and Absorption of Multiband Electromagnetic Waves

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: April 9, 2024

With the continuous development of electromagnetic wave-absorbing materials, design artificial structures for absorbers based on concept metamaterials is becoming more abundant. However, in process, it difficult to further broaden effective absorption band due limitation that traditional single-size structure responds waves only specific frequency bands. Therefore, this paper, moth-eye bionic hexagonal absorber with antireflection performance, an Archimedean tiling designed optimize it, and through introduction a variety primitives large differences dimensions, multifrequency band-response mechanism achieved enhance multireflection mechanism, which can effectively improve wave performance. Ultimately, optimized by (3.4.6.4) achieve 10.26 GHz at thickness 2 mm. This work presents new idea metamaterials, has broad application prospect aerospace, electronic information countermeasures, communication, detection industries.

Language: Английский

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Dimensionally Confined Growth in Nanometer‐Sized Hierarchical Heterostructures: Nanoscale Visualization of Enhanced Magnetic and Electric Interactions

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract Quantum size effects and interfacial dimensional interactions enable nanometer‐scale hierarchical heterostructures to adjust band structures by energy level discretization, impurity formation, inversion, allowing for controlled carrier localization directional relaxation. These unique characteristics show great potential applications in ferroelectrics, optoelectronics, capacitors, sensors. Yet, optimizing performance fine‐tuning the properties of nanoscale systems, especially composition, remains a considerable challenge. Here dimensionally confined synthesis is reported through pyrolysis‐based metal‐organic framework‐on‐metal‐organic framework (MOF‐on‐MOF) strategy, resulting continuous metal‐carbon carbon‐oxide interfaces below 50 nm. Off‐axis electron holography theoretical calculations are utilized visualize dynamic conversion between localized free electrons, as well relaxation processes high‐density magnetic coupling at nanoscale. phenomena rarely observed micron‐scale or non‐hierarchical heterostructures. improvements lead significantly enhanced dielectric properties, efficient interaction with high‐frequency electromagnetic (EM) fields, indicated loss bandwidth covering full C‐band. Future work will explore constructing these targeted materials examine new such topological behavior, ferrimagnetism, giant magnetoresistance, sustainability optoelectronic technology.

Language: Английский

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