Magnetic media synergistic carbon fiber@Ni/NiO composites for high-efficiency electromagnetic wave absorption

Chemical Engineering Journal, Год журнала: 2024, Номер 492, С. 152245 - 152245

Опубликована: Май 14, 2024

Язык: Английский

---

Polydopamine-derived nitrogen-doped carbon coupled with MoSe2 nanosheets composites toward high-efficiency electromagnetic wave absorption

Carbon, Год журнала: 2024, Номер 225, С. 119119 - 119119

Опубликована: Апрель 8, 2024

Язык: Английский

---

Constructing Built-In Electric Fields with Semiconductor Junctions and Schottky Junctions Based on Mo–MXene/Mo–Metal Sulfides for Electromagnetic Response

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Июнь 11, 2024

Abstract The exploration of novel multivariate heterostructures has emerged as a pivotal strategy for developing high-performance electromagnetic wave (EMW) absorption materials. However, the loss mechanism in traditional is relatively simple, guided by empirical observations, and not monotonous. In this work, we presented semiconductor–semiconductor–metal heterostructure system, Mo–MXene/Mo–metal sulfides (metal = Sn, Fe, Mn, Co, Ni, Zn, Cu), including semiconductor junctions Mott–Schottky junctions. By skillfully combining these distinct functional components (Mo–MXene, MoS 2 , metal sulfides), can engineer multiple heterogeneous interface with superior capabilities, broad effective bandwidths, ultrathin matching thickness. successful establishment gives rise to built-in electric field that intensifies electron transfer, confirmed density theory, which collaborates dielectric polarization mechanisms substantially amplify EMW absorption. We detailed synthesis series featuring both semiconductor–semiconductor semiconductor–metal interfaces. achievements were most pronounced Mo–MXene/Mo–Sn sulfide, achieved remarkable reflection values − 70.6 dB at thickness only 1.885 mm. Radar cross-section calculations indicate MXene/Mo–metal have tremendous potential practical military stealth technology. This work marks departure from conventional component design limitations presents pathway creation advanced MXene-based composites potent capabilities.

Язык: Английский

---

Plasma induced dynamic coupling of microscopic factors to collaboratively promote EM losses coupling of transition metal dichalcogenide absorbers

Advanced Powder Materials, Год журнала: 2024, Номер 3(3), С. 100180 - 100180

Опубликована: Янв. 26, 2024

Plasma as the fourth state of matter has attracted great attention for material surface modification, which could induce changes in microscopic factors, such defects, phase transitions, crystallinity, and so on. However, interactions among those factors regulation mechanism macroscopic properties have rarely been investigated. Two-dimensional (2D) transition metal dichalcogenide with tunable structure is one most promising electromagnetic wave (EMW) absorbers, provides a favorable platform systematically studying dynamic coupling its factors. Herein, we constructed NaBH4 solution-assisted Ar plasma method to modify 2H–MoS2 1T-WS2 exploring For MoS2 WS2, treatment behaves different effects on dielectric responses, realizing collaboratively promote EM losses coupling. Consequently, MS-D3-0.5 (MoS2, 3 kV voltage, 0.5 mol L−1 solution) displays an optimum effective absorption bandwidth 8.01 GHz, 319.4 % more than that MS-raw sample. This study not only reveals novel induced EMW dissipation, but also presents new plasma-dominated modification optimize performance.

Язык: Английский

---

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Март 17, 2024

Abstract The emergence of metamaterials and their continued prosperity have built a powerful working platform for accurately manipulating the behavior electromagnetic waves, providing sufficient possibility realization metamaterial absorbers with outstanding performance. However, composed metallic materials typically possess many unfavorable factors, such as non‐adjustable absorption, easy oxidation, low‐melting, expensive preparation costs. selection dielectric provides excellent alternatives due to remarkable properties, thus dielectric‐based (DBMAs) attracted much attention. To promote breakthroughs in DBMAs guide future development, this work systematically deeply reviews recent research progress from four different but progressive aspects, including physical principles; classifications, material selections tunable properties; technologies; functional applications. Five types theories related mechanisms, Mie resonance, guided‐mode Anapole are briefly outlined explain having near‐perfect absorption Mainstream selections, structure designs, highlighted. Several widely utilized methods customizing given. Various practical applications sensing, stealth technology, solar energy interference suppression reviewed. Finally, some key challenges feasible solutions DBMAs’ development provided.

Язык: Английский

---

Perspectives for electromagnetic wave absorption with graphene

Carbon, Год журнала: 2024, Номер 223, С. 119017 - 119017

Опубликована: Март 4, 2024

Язык: Английский

---

Structural Engineering of Hierarchical Magnetic/Carbon Nanocomposites via In Situ Growth for High-Efficient Electromagnetic Wave Absorption

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Апрель 15, 2024

Materials exhibiting high-performance electromagnetic wave absorption have garnered considerable scientific and technological attention, yet encounter significant challenges. Developing new materials innovative structural design concepts is crucial for expanding the application field of absorption. Particularly, hierarchical structure engineering has emerged as a promising approach to enhance physical chemical properties materials, providing immense potential creating versatile materials. Herein, an exceptional multi-dimensional was meticulously devised, unleashing full microwave attenuation capabilities through in situ growth, self-reduction, multi-heterogeneous interface integration. The features three-dimensional carbon framework, where magnetic nanoparticles grow on skeleton, necklace-like structure. Furthermore, nanosheets assemble within this framework. Enhanced impedance matching achieved by precisely adjusting component proportions, intelligent integration diverse interfaces bolstered dielectric polarization. obtain Fe

Язык: Английский

---

Porous Structure Fibers Based on Multi‐Element Heterogeneous Components for Optimized Electromagnetic Wave Absorption and Self‐Anticorrosion Performance

Small, Год журнала: 2024, Номер 20(47)

Опубликована: Авг. 11, 2024

Abstract The excellent performance of electromagnetic wave absorbers primarily depends on the coordination among components and rational design structure. In this study, a series porous fibers with carbon nanotubes uniformly distributed in shape pine leaves are prepared through electrospinning technique, one‐pot hydrothermal synthesis, high‐temperature catalysis method. impedance matching nanofibers structure is optimized by incorporating melamine into spinning solution, as it undergoes gas decomposition during calcination. Moreover, electronic can be modulated controlling NH 4 F content synthesis process. Ultimately, Ni/Co/CrN/CNTs‐CF specimen (P3C NiCrN12) exhibited superior performance, while achieving minimum reflection loss (RL min ) −56.18 dB at thickness 2.2 mm maximum absorption bandwidth (EAB max 5.76 GHz 2.1 mm. This study presents an innovative approach to fabricating lightweight, thin materials exceptional properties wide optimizing three key factors influencing performance.

Язык: Английский

---

Fabrication of MOF-rGO aerogels to enhance electromagnetic wave absorption by adjusting the morphology and structure of MOFs by electron transfer

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151384 - 151384

Опубликована: Апрель 16, 2024

Язык: Английский

---

Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra-Thin Electromagnetic Wave Absorber

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Сен. 26, 2024

Abstract The synthesis of carbon supporter/nanoscale high-entropy alloys (HEAs) electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering conductive/dielectric genes. Electron migration modes within HEAs manipulated electronegativity, valence electron configurations and molar proportions constituent elements determine steady state efficiency equivalent dipoles. Herein, enlightened skin-like effect, a reformative using carbonized cellulose paper (CCP) supporter is used to preserve oxygen-containing functional groups (O·) fibers (CCF). Nucleation construction emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked metabolism induced O·. Meanwhile, mode switchable electron-rich sites promotes orientation polarization anisotropic By virtue reinforcement strategy, CCP/HEAs composite prepared 35% ratio Mn element (CCP/HEAs-Mn 2.15 ) achieves efficient wave (EMW) absorption − 51.35 dB at ultra-thin thickness 1.03 mm. mechanisms resulting dielectric properties HEAs-based EMW absorbing materials elucidated combining theoretical calculations with experimental characterizations, which provide bases feasible strategies simulation practical application devices (e.g., ultra-wideband bandpass filter).

Язык: Английский

---