Recent progress in carbon-based materials and loss mechanisms for electromagnetic wave absorption

Carbon, Год журнала: 2024, Номер 219, С. 118834 - 118834

Опубликована: Янв. 18, 2024

Язык: Английский

---

A Perspective of Tailoring Dielectric Genes for 2D Materials Toward Advanced Electromagnetic Functions

Advanced Functional Materials, Год журнала: 2024, Номер 34(52)

Опубликована: Авг. 27, 2024

Abstract 2D materials and their composites with electromagnetic properties are becoming increasingly popular. Obtaining insight into the nature of (EM) response manipulation is imperative to guide scientific research technological exploitation at such a critical time. From this perspective, dielectric genes material hybrids have been highlighted based on recent literature. This endows an unlimited possibility manipulating EM response, even elevated temperatures. The definitions criteria toward systematically clarified summarized. gene categories successfully discriminated, including conduction networks, intrinsic defects, impurity interfaces in composite, temperature evolution revealed detail. More importantly, tuning strategies for microwave absorption, shielding effectiveness, expanded functions thoroughly discussed. Finally, significant predictions provided multispectral functions, future applications multifunctional exploration anticipated. Dielectric will open unexpected horizon advanced functional coming 5G/6G age, providing boost promoting environmental protection, devices, next‐generation smart devices.

Язык: Английский

---

Miniaturized Hard Carbon Nanofiber Aerogels: From Multiscale Electromagnetic Response Manipulation to Integrated Multifunctional Absorbers

Advanced Functional Materials, Год журнала: 2024, Номер 34(48)

Опубликована: Июль 17, 2024

Abstract The multiscale structural engineering strategy presents a powerful method for tailoring the attributes of materials at various levels, enabling flexible control and manipulation their electromagnetic properties. Nonetheless, orchestrating architecture polymer‐derived carbon aerogels specifically microwave absorption poses significant challenges. Herein, aramid‐derived hard nanofiber aerogel microspheres (CNFAMs) featuring hierarchical skin‐core structure are fabricated through wet‐spinning technique, combined with reprotonation‐mediated self‐assembly carbonization processes. presence large‐scale voids between neighboring microscale porosity within themselves improves impedance matching promotes reflection scattering. distinct graphitic domains defects serve as pivotal elements conduction polarization losses, significantly impacting attenuation. By meticulously macroscale dimensions, porous architecture, nanoscale domains, optimized CNFAMs demonstrate remarkable bandwidth 9.62 GHz an ultralow filling 0.97 wt%. Additionally, implementation application‐oriented innovative integration polysilsesquioxane‐CNFAMs in host–guest is explored. This composite system brings together broadband absorption, superhydrophobicity, thermal insulation, resistance to freezing, robust tolerance harsh environments. Such multifaceted approach designed tackle growing challenges associated complex environments effectively.

Язык: Английский

---

Metal–Organic Framework-Derived Hierarchical Cu9S5/C Nanocomposite Fibers for Enhanced Electromagnetic Wave Absorption

Advanced Fiber Materials, Год журнала: 2024, Номер 6(2), С. 430 - 443

Опубликована: Янв. 30, 2024

Язык: Английский

---

Shell engineering afforded dielectric polarization prevails and impedance amelioration toward electromagnetic wave absorption enhancement in nested‐network carbon architecture

Chemical Engineering Journal, Год журнала: 2024, Номер 501, С. 157556 - 157556

Опубликована: Ноя. 16, 2024

Язык: Английский

---

Dimensional Design of Cellulose Aerogels with Schottky Contact for Efficient Microwave Absorption

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 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.

Язык: Английский

---

Nitrogen-doped carbon nanotubes-locally-grown three-dimensional CeO2/C/Co foam enabling fabulous hydrophobicity, thermal insulation, and highly efficient microwave absorption

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160007 - 160007

Опубликована: Янв. 1, 2025

Язык: Английский

---

Multidimensional nanomaterials synergistic polyimide nanofiber/MXene/NiFe2O4 hybrid aerogel for high-performance microwave absorption

Chemical Engineering Journal, Год журнала: 2023, Номер 470, С. 144435 - 144435

Опубликована: Июнь 28, 2023

Язык: Английский

---

Polarization genes dominated heteroatom-doped graphene aerogels toward super-efficiency microwave absorption

Journal of Materials Chemistry C, Год журнала: 2023, Номер 11(29), С. 9804 - 9814

Опубликована: Янв. 1, 2023

The cellular structure of heteroatom-doped graphene aerogel improves the impedance matching, and polarization gene dominated cell walls generate a great quantity sites, synergistically promoting its microwave attenuation.

Язык: Английский

---

Freeze-Cast Ni-MOF Nanobelts/Chitosan-Derived Magnetic Carbon Aerogels for Broadband Electromagnetic Wave Absorption

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Апрель 16, 2024

The exceptional benefits of carbon aerogels, including their low density and tunable electrical characteristics, infuse new life into the realm creating ultralight electromagnetic wave absorbers. clever conceptualization straightforward production carbon-based which marry aligned microporous architecture with nanoscale heterointerfaces atomic-scale defects, are vital for effective multiscale microwave response. We present an uncomplicated synthesis method crafting porous Ni@C nanobelts anchored on N, S-doped aerogels (Ni@C/NSCAs), featuring structural intricacies─achieved through pyrolysis freeze-cast Ni-MOF chitosan aerogel composites. well-ordered configuration, combined multiple adopting a "nanoparticles-nanobelts-nanosheets" contact schema, along wealth adeptly modulates conductive, polarization, magnetic losses to realize equilibrium in impedance matching. This magnetically doped showcases impressive absorption bandwidth 8.96 GHz minimum reflection loss -68.82 dB, while maintaining exceptionally filler content 1.75 wt %. Additionally, applied coating exhibits astonishing radar cross-section reduction 51.7 dB m2, signifying its superior scattering capabilities. These results offer key insights attainment broad-spectrum features by enhancing structure current aerogels.

Язык: Английский

---