A versatile strategy towards magnetic/dielectric porous heterostructure with confinement effect for lightweight and broadband electromagnetic wave absorption

A versatile strategy towards magnetic/dielectric porous heterostructure with confinement effect for lightweight and broadband electromagnetic wave absorption
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具有限制效应的磁/介电多孔异质结构的通用策略,用于轻质和宽带电磁波吸收

DOI:
10.1016/j.cej.2019.03.295
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发表时间:
2019-08
影响因子:
15.1
通讯作者:
Yan Mi
Yan Mi
中科院分区:
工程技术1区
文献类型:
--
作者:
Zhou Chenhui;Wu Chen;Yan Mi

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同时含有磁性和介电组分的先进电磁波吸收材料在不断发展的电子和通信设备中引起了相当大的关注。然而,通过引入介电组分来对抗由于磁稀释而牺牲的磁损耗是相当具有挑战性的。在这里,一种新的限制策略已被采用,以开发多孔异质Fe 7 Co 3/ZnO纳米片,其中Fe 7 Co 3纳米粒子具有单畴尺寸和分散分布,可以实现增强的自然共振。纳米片表现出独特的多孔特征,具有显著降低的密度。此外,通过中断的Fe 7 Co 3导电网络实现的可调介电损耗的功能与磁损耗协同增强吸收在宽的频率范围(7.92 GHz),覆盖整个Ku波段和一半的X波段。本研究提出的限制策略不仅为设计具有低密度和宽带宽的高性能电磁波吸收体铺平了道路,而且为合成具有可调组成的二维复合材料提供了一种通用的方法,可扩展应用于储能,催化,生物医学和传感。
Advanced electromagnetic (EM) wave absorbing materials containing both magnetic and dielectric components have attracted considerable attention for the ever-developing electronic and telecommunication devices. It is however, rather challenging to combat the sacrificed magnetic loss due to magnetic dilution by the introduction of the dielectric component. Here a novel confinement strategy has been adopted to develop porous heterogeneous Fe7Co3/ZnO nanosheets where Fe7Co3nanoparticles with single domain size and dispersed distribution can be achieved for enhanced natural resonance. The nanosheets exhibit unique porous feature with significantly reduced density. Also, tunable dielectric loss achieved via interruption of the Fe7Co3conductive network functions synergistically with the magnetic loss for enhanced absorption over a wide frequency range (7.92 GHz), covering the complete Ku band and half of the X band. The confinement strategy proposed in this study not only paves the way for designing high-performance EM wave absorber with low density and broad bandwidth, but also provides a versatile method for the synthesis of two-dimensional composites with tunable composition for extended applications in energy storage, catalysis, biomedicine and sensing.
金属有机框架衍生的多级Co/C@V(2)O(3)空心球作为薄型、轻质、高效的电磁波吸收体
DOI: 10.1002/chem.201805565
发表时间: 2019
期刊: Chemistry - A European Journal
影响因子: --
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