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Chemistry, Physical
Minmin Liu et al.
Summary: Control of size and dispersity is critical for magnetic metal absorbents to inhibit eddy currents and enhance electromagnetic wave absorption performance (EMWAP). Layered C/Ni nano particle (NP) composites were developed with controlled size and dispersity for excellent EMWAP. The synthetic method via one-step calcination process allows for adjustment of electric/magnetic properties and EMWAP, showing high absorption rate, thin thickness, and wide bandwidth.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Hesong Ren et al.
Summary: Finding high-efficiency microwave absorbing materials with corrosion resistance is crucial for enhancing environmental adaptability and survivability of military targets in harsh chemical environments. The synthesis of superhelical chiral polypyrrole nanofibers offers promising high-performance anticorrosive microwave absorbers, capable of enhancing impedance matching and electromagnetic wave attenuation through enhanced dielectric and magnetic losses.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Haicheng Wang et al.
Summary: Lightweight nanocomposites made of magnetic and dielectric units have attracted great interest as potential high-performance electromagnetic wave absorbing materials. This study reports a method to fabricate (Co, SiO2)/PPy composites with tunable electromagnetic properties, where the absorption performance and effective bandwidth can be controlled by adjusting the SiO2 content. These composites show efficient absorption, covering the entire X band, with key factors including improved impedance matching, high interfacial polarization, and complex electromagnetic synergy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jiang Guo et al.
Summary: NiFe2O4/polypyrrole nanocomposites demonstrate negative permittivity in the low frequency regions and significantly enhanced electromagnetic wave absorption property in the high frequency regions. The enhanced negative permittivity is observed in the nanocomposites with different NiFe2O4 loadings, indicating the formation of a metal-like electrical conducting network. The minimum reflection loss of -40.8 dB is achieved in the 40.0 wt% NiFe2O4/PPy composites with a thickness of 1.9 mm. The research work provides guidance for the fabrication of nanocomposites with excellent electromagnetic wave absorption.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Rui Guo et al.
Summary: In this study, a rational design and synthesis of N-doped Ni@SiO2/graphene composite, consisting of a 3D interconnected porous graphene network and Ni@SiO2 core-shell architecture, was reported. This lightweight and broadband material exhibited highly efficient electromagnetic wave absorption. By optimizing the structure and composition of the composite, the material achieved strong absorption in a specific frequency range.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Hanxiao Xu et al.
Summary: A spatial confined growth strategy encapsulating small-size MOFs derivatives into hollow carbon nanocages was proposed, showing significant spatial confinement effect on the crystal size and dielectric polarization. The phase hybridization induced by size-dependent oxidation motion led to satisfying microwave attenuation, with optimal reflection loss and effective bandwidth achieved. The strategy offers a versatile methodology for manipulating the size of MOFs derivatives and optimizing dielectric polarization and microwave attenuation.
NANO-MICRO LETTERS
(2022)
Article
Materials Science, Ceramics
Xiaokang Wang et al.
Summary: A rod-like porous Co/C composite with excellent microwave absorption performance was successfully fabricated in this study and showed significant potential for application in the field of EM wave absorption. The synergy between the porous carbon framework and cobalt nanoparticles, as well as the multiple polarization loss due to the porous nature of the structure, contributed to the favorable microwave absorption performance of the Co/C composites.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yuting Zhang et al.
Summary: In this study, carbon nanotubes microspheres (CNTsM) with porous skeleton and net structure were successfully prepared using a simple method of ultrasonic atomization combined with heat treatment. The dielectric characteristics and electromagnetic wave (EMW) absorption properties of CNTsM within the frequency range of 2-18 GHz were investigated, showing excellent EMW absorption performance due to multiple reflection/scattering, enhanced interfacial polarization, and optimized impedance matching. CNTsM can be considered a new competitive candidate for EMW absorption materials, with a maximum reflection loss of -35 dB and a wide effective absorption bandwidth of 4.4 GHz.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yutao Zhu et al.
Summary: The study successfully prepared porous V oxide@C spindles with excellent electromagnetic wave absorption performance, with V2O3 as the main form. The absorbent showed low reflection loss and a wide absorption bandwidth, covering the entire Ku band.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Coatings & Films
Zhendong Chen et al.
Summary: SiC/C nanocomposites prepared from rice husks show excellent electromagnetic absorption properties, achieving optimal impedance matching and attenuation capability.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yun Qiu et al.
Summary: CoMn-MOF-74 precursors with rough surfaces are prepared by etching method, forming a large number of Co@C@MnO heterogeneous interfaces via calcination. The engineered microstructures of the precursors result in different numbers of heterogeneous interfaces in the Co@C@MnO nanorods, leading to excellent electromagnetic wave absorption performance. Adjusting the etching time can tune the microstructure of the precursors, affecting the number of heterogeneous interfaces in the nanorods.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Construction & Building Technology
Yinong Shen et al.
Summary: By adjusting the pore structure and hydration of cementitious composites, the incorporation of PVA fibers and high-volume fly ash has significantly improved the electromagnetic wave absorption performance of the materials.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Materials Science, Ceramics
Xia Fang et al.
Summary: Fully dense SiC/spherical graphite-AlN microwave-attenuating composite ceramics were prepared, where the addition of SiC led to a decrease in electrical conductivity and enhanced polarization relaxation. The absorption performance characteristics of the composites could be significantly tuned by controlling the SiC content, resulting in optimized impedance matching and superior absorption at certain frequencies.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Yingzhi Jiao et al.
Summary: This study reports the synthesis of Cu/C nanocomposites by controlled pyrolysis of a MOF-guest complex, which exhibit excellent EMA performance due to the carbon network and multiple heterogeneous interfaces. The research provides a new idea for designing high-performance EMA nanocomposites by tuning electrical conductivity and interfacial polarization.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Hammad Younes et al.
Summary: Electromagnetic wave radiation can have adverse health effects on humans and disrupt the operations of nearby electronic devices. Developing new materials with strong wave absorption properties and being lightweight is of great technological interest worldwide. Research on the composite of Fe3O4 multi-granular nanoclusters and multi-walled carbon nanotubes shows promising results for electromagnetic shielding enhancement and the effect of tilted angle on reflection loss.
Article
Chemistry, Physical
Baoxin Zhang et al.
Summary: In this study, graphene-layer-coated B4C nanosheets were reported for the first time as efficient electromagnetic wave absorption materials. The unique structure and graphene shell of the B4C@GN NSs led to significant improvement in electromagnetic wave absorption performance, with a minimal reflection loss of 24.6 dB and a broad effective absorption bandwidth of 3.9 GHz. This development may provide a theoretical foundation for the functionalization of structural ceramic materials.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yanhong Lu et al.
Summary: With the increasing electromagnetic pollution, there is a strong demand for advanced electromagnetic wave shielding and absorbing materials that are multifunctional with ultra-lightweight, wide bandwidth, highly flexible, and robust. 2D nanomaterials like graphene and MXene have shown great potential for these applications, while 3D cross-linked graphene or/and MXene based materials have demonstrated excellent EMI shielding and MA performance.
Article
Chemistry, Physical
Li Ma et al.
Summary: The study successfully developed nanocomposites with superior electromagnetic wave absorption properties by incorporating SiC nanowires/MXene heterogeneous structures into the PVDF matrix. These composites achieved an effective bandwidth of 5.0 GHz in the Ku-band, with low reflection loss and excellent electromagnetic wave absorption performance.
Article
Chemistry, Physical
Xinci Zhang et al.
Summary: By utilizing the multifunctional material CoFe@N-CNT/rGO, excellent performance in rechargeable Zn-air battery and electromagnetic wave absorption can be achieved.
Article
Materials Science, Ceramics
Hui Mei et al.
Summary: The study successfully utilized a combination of DLP 3D printing technology and modified ceramic precursor PSO to fabricate Al2O3 ceramic devices with a gradient impedance bilayer structure, while incorporating needle-like SiC nanowire absorbents to enhance the functional characteristics. Different treatment processes on the Al2O3/SiCnw/SiOC composites revealed that sample 1400-2 showed optimal microwave absorption performance, with an exceptionally high absorption rate of electromagnetic waves. The results suggest that the Al2O3/SiCnw/SiOC composite with bilayer gradient impedance structures is a promising candidate for stealth radar wave absorption due to its unique dielectric properties.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Xiaoxiao Zhao et al.
Summary: The composite absorbing material CN-ABF prepared by combining bamboo fiber with metal-organic framework shows great electromagnetic wave absorption performance, with minimal reflection loss and enhanced properties such as multi-polarity and dielectric loss.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Zhenjiang Li et al.
Article
Engineering, Chemical
Yun Wei et al.
ADVANCED POWDER TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Shisi Peng et al.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Physics, Applied
VM Petrov et al.
TECHNICAL PHYSICS LETTERS
(2004)
