ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yi Hou,Jixiang Wang,Baijun Chen,Hui Zhang,Zichen Xiang,Haikui Zhu,Lixi Wang
To meet the requirements of lightweight and wideband attenuation for advanced electromagnetic (EM) absorption materials, the combination of both MOF composition and hierarchical structural design was applied as the strategy to prepare the MOF-derived Co@SiC nanowire (Co@SiCnw) nanocomposite aerogel. The hierarchical and laminated structures with multiple Co@SiCnw layers were constructed via a mixed growth-assisted freeze-drying and calcination process. The ultralightweight Co@SiCnw presents a low density of 0.11 g/cm3. With abundant second-phase polarization interfaces and enlarged EM wave attenuation channels to enhance dielectric and conductive loss, the optimized Co@SiCnw offers a minimal reflection loss (RLmin) of −61.4 dB at 10.0 GHz (2.64 mm) and an effective absorption bandwidth (EAB) as wide as 7.44 GHz with a sample thickness of only 2.16 mm. Furthermore, multifunctionalities, including low density, thermal insulation, and self-standing, were demonstrated for Co@SiCnw, making it a high-performance and practical microwave absorption material.
研究领域:
材料科学
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电磁学
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纳米技术
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DOI
PubMed
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-16
·
IF 36.3
Liu Xiaoji,Duan Yuping,Wu Nan,Li Guangming,Guo Yuan,Liu Jiangyong,Zhu Ning,Wang Qiang,Wang Lin,Xu Zichen,Wei Hao,Wang Guojun,Zhang Zhijia,Zhang Songsong,Zhou Wenjun,Ma Teng,Wang Tongmin
Magnetic absorbers with high permeability have significant advantages in low-frequency and broadband electromagnetic wave (EMW) absorption. However, the insufficient magnetic loss and inherent high conductivity of existing magnetic absorbers limit the further expansion of EMW absorption bandwidth. Herein, the spinel (FeCoNiCrCu) 3 O 4 high-entropy oxides (HEO) are successfully constructed on the surface of FeCoNiCr 0.4 Cu 0.2 high-entropy alloys (HEA) through low-temperature oxygen bath treatment. On the one hand, HEO and HEA have different magnetocrystalline anisotropies, which is conducive to achieving continuous natural resonance to improve magnetic loss. On the other hand, HEO with low conductivity can serve as an impedance matching layer, achieving magneto-electric co-modulation. When the thickness is 5 mm, the minimum reflection loss (RL) value and absorption bandwidth (RL < − 5 dB) of bi-phase high-entropy composites (BPHEC) can reach − 12.8 dB and 633 MHz, respectively. The RCS reduction value of multilayer sample with impedance gradient characteristic can reach 18.34 dB m 2 . In addition, the BPHEC also exhibits temperature-stable EMW absorption performance, high Curie temperature, and oxidation resistance. The absorption bandwidth maintains between 593 and 691 MHz from − 50 to 150 °C. This work offers a new and tunable strategy toward modulating the electromagnetic genes for temperature-stable ultra-broadband megahertz EMW absorption.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 1
·150
·
IF 4.7
Xiangyu He,Jiaqi Lu,Feng Gao,Shurong Dong,Juan Li,Hao Jin,Jikui Luo
Poly(vinylidene fluoride-trifluorethylene) (P(VDF-TrFE)) has promising potential applications in radio-frequency filters due to their excellent piezoelectric properties, flexibility, and stability. In this paper, a flexible film bulk acoustic wave filter is investigated based on P(VDF-TrFE) as piezoelectric film. A new method based on three-step annealing is developed to efficiently remove the porosity inside the P(VDF-TrFE) films so as to improve its properties. The obtained film achieved high β-phase content beyond 80% and a high piezoelectric coefficient of 27.75 pm/V. Based on the low porosity β-phase films, a flexible wide-band RF filter is designed, which consists of a bulk acoustic wave resonator and lumped inductor-capacitor elements as a hybrid configuration. The resonator sets the filter’s center frequency, while the lumped LC-based matching network extends the bandwidth and enhances out-of-band rejection. The testing results of the proposed wide-band filter show its good performance, with 12.5% fractional bandwidth and an insertion loss of 3.1 dB. To verify the possibility of folding and stacking the flexible bulk acoustic wave devices for high-density multi-filter integration in MIMO communication, bending tests of the filter are also conducted with the bending strain range up to 5500 με. The testing results show no noticeable performance degradation after four bending cycles. This work demonstrates the potential of β-phase P(VDF-TrFE) bulk acoustic wave filters to expand the scope of future flexible radio-frequency filter applications.
研究领域:
材料科学
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电子工程
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射频技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Danqiang Huang,Xiangyun Zhang,Jianfeng Dai,Zizhou Yuan
The rapid advancement of wireless communications, radar systems, and electronic devices has resulted in a substantial increase in electromagnetic interference (EMI), which poses a threat to electronic device performance and human health. This study addresses the urgent need for lightweight materials with strong absorption capacities, wide absorption bandwidths, and low thickness values. For this purpose, ZIF-67-derived C/Co nanofibers were synthesized via electrospinning, dipping, and high-temperature carbonization. Co 2+ ions were pre-anchored and encapsulated in polyacrylonitrile (PAN) fibers and are grown by immersion in an organic ligand. Utilizing 0.4 g of cobalt nitrate hexahydrate, the amount of encapsulated Co 2+ was optimized to provide the greatest electromagnetic wave absorption performance. Under these conditions, the reflection loss was −49.45 dB, and the maximum effective absorption bandwidth was 6.48 GHz, thereby covering the entire Ku band. The composite material demonstrated a significant improvement in impedance matching and electromagnetic wave dissipation, which was attributed to the uniform dispersion of Co particles and the formation of multi-component heterogeneous interfaces. This study presents a pragmatic method for creating high-performance materials that could potentially reduce electromagnetic interference (EMI) in the aerospace, telecommunications, and defense sectors.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Xin Wang,Xiaoming Chen,Baichuan Wang,Qingyuan He,Jincao Cao,Ye Zhu,Kewei Su,Huiyi Yan,Pengsong Sun,Runlang Li,Jie Zhang,Jinyou Shao
Aerogels with porous structures offer an attractive approach to modulating electromagnetic parameters and enhancing electromagnetic wave (EMW) absorption performance. However, conventional aerogels are limited by their single-scale pore size and fixed orientation, which constrain their EMW absorption capabilities. This study introduces aerogels with dual-scale pores and dual-network structure constructed via constant-temperature freezing and secondary-infusion freezing method. Multiscale aerogels with both micrometer- and submillimeter-scale pores are constructed when the Ti 3 C 2 T x MXene and thermoplastic polyurethane solution is frozen and dried at a specific temperature, leading to an ultra-wide effective absorption bandwidth (EAB) reaching 10.41 GHz in the vertical direction. Furthermore, to address the poor EMW absorption in the parallel direction, a secondary infusion freezing method is applied to form an aerogel with a dual-network structure, which forms reflective interfaces perpendicular to the incident EMW in various directions. This adjustment enhances the EAB in the parallel direction from 1.58 to 5.93 GHz, marking a 275.32% enhancement, while the EAB in the vertical incident direction reaches 8.08 GHz. This design strategy overcomes the limitations of structural scale and arrangement direction, enriching the attenuation mechanisms of the absorber, while effectively reducing sensitivity to the direction of incoming EMW, offering new insights for designing efficient EMW absorbers.
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ibrahim Abdalla,Ahmed Salim,Miaomiao Zhu,Jianyong Yu,Zhaoling Li,Bin Ding
With the fast advancement of up-to-date communication technologies, electromagnetic wave (EMW) absorption materials are widely required for various applications. However, it is still a big challenge to produce lightweight, flexible, and high-efficiency EMW absorption materials in a broad-ranging frequency. Herein, we designed to fabricate the magnetic and dielectric nanofibrous membranes which can be effectively used as EMW absorption materials by facile electrospinning process. The as-fabricated composite carbon nanofibers (CNFs), which combined the components of nickel, cobalt antioxidant nanoparticles, and carbon nanotubes, exhibited outstanding magnetic and dielectric properties and strong absorption ability in a wide frequency range. These nanoparticles encapsulated in CNFs are extremely beneficial to the electrical conductivity of the composites through decreasing the contact loss within the CNFs by formation of the metal–metal interfaces. Correspondingly, the RL value of −46.60 dB was reached at 4.88 GHz frequency range with a layer thickness of 5.5 mm for these mechanically light and flexible membranes. The enhanced absorption performance (<−10 dB) in the wide frequency band (4.16–18 GHz) can be achieved by selecting a suitable thickness of the material. Results demonstrate that the permittivity and permeability of developed samples have been largely improved because of the integrated interaction of all introduced components in the structure. The composite membranes are a promising candidate for scalable, lightweight, and high-performance EMW absorption materials in the frequency range from C band to Ku band (4–18 GHz).
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiao Li,Junpeng Ma,Xu Zhou,Weipeng Zhong,Xinchao Wang,Hao-Yang Mi,Chuntai Liu,Changyu Shen
Conductive polymer composites (CPCs) have attracted considerable attention in the field of microwave absorption (MA) due to their lightweight nature and tunable electromagnetic properties. The integration of porous structure into CPCs facilitates simultaneous weight reduction, enhanced MA efficiency, and broad absorption bandwidth. However, achieving high-performance microwave absorption in CPCs with low filler content remains a formidable challenge. Herein, inspired by the segmental body structure of caterpillars, an electromagnetic dual-function hybrid cuniculi composite (EMHC) containing hybrid electromagnetic nanostring (EMNS) nanofillers and segmental microporous structure is developed via in situ sacrificial template synthesis and supercritical plastic expansion methods. The multi-dimensional electromagnetic hollow structure constructed leading to optimized impedance matching and enhanced electromagnetic performance via multiple synergistic loss mechanisms, including multiple reflection loss, dielectric loss, and magnetic loss. As a result, the EMHC with low filler content (5 wt%) and lightweight (0.45 g/cm 3 ) exhibited outstanding MA properties, achieving an ultra-wide effective absorption bandwidth of 6.81 GHz and a minimum reflection loss of −50.25 dB. Notably, the maximum effective absorption region fully encompassed the X-band and Ku-band, with an unprecedentedly low thickness. This study presents a novel strategy for designing and fabricating lightweight, porous polymer composites with superior microwave absorption capabilities, offering significant potential for advanced electromagnetic applications.
研究领域:
材料科学
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电磁学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Chenjian Li,Shixian Zhang,Feng Zhao,Zhiwei Ye,Yuhen Fu,Chuanxi Xiong,Xueliang Jiang,Junlong Yao
Organic magnets possess broad application prospects in electromagnetic wave (EW) absorbing materials (EAMs) due to their special electromagnetic properties, lightweight nature and good compatibility. Thus, in this paper, an innovative organic magnet, magnetic iongel (C12IMSO3[FeCl4]), was successfully fabricated through the self-assembly of an alkyl long-chain imidazolium zwitterion (C12IMSO3) and a magnetic ionic liquid (Bmim[FeCl4]). EWs were absorbed via various attenuating routes in C12IMSO3[FeCl4], such as ionic conductive, polarization and magnetic loss. The minimum reflect loss (RLmin) and effective absorption bandwidth (EAB) of the C12IMSO3[FeCl4] EW absorber could reach −35 dB and 1.8 GHz, respectively. After being combined with CNTs and further introducing strong electric conductive loss, the C12IMSO3[FeCl4]/CNT composition showed more advanced EW absorption properties, especially in terms of the EAB; C12IMSO3[FeCl4]/CNT achieved an EAB of 7.44 GHz at a small thickness of 2.2 mm. The ultra-broadband EW absorption performance of the C12IMSO3[FeCl4]/CNT composite transcends many reported inorganic magnetic EW absorbing composites, providing a new approach to broadband EW absorbing materials.
研究领域:
材料科学
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电磁学
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纳米复合材料
·
功能材料
·
高分子物理
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应用物理学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）