Hierarchical FeCo@MoS2 Nanoflowers with Strong Electromagnetic Wave Absorption and Broad Bandwidth
Hierarchical FeCo@MoS2 Nanoflowers with Strong Electromagnetic Wave Absorption and Broad Bandwidth
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DOI：
10.1021/acsanm.8b01203
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发表时间：
2018-09
影响因子：
5.9
通讯作者：
Chenhui Zhou;Chen Wu;M. Yan
中科院分区：
文献类型：
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作者：
Chenhui Zhou;Chen Wu;M. Yan
随着千兆赫范围内电磁波的利用不断增加，先进的电磁 (EM) 波吸收材料在技术上具有重要意义。含有 FeCo 纳米颗粒与 MoS2 纳米花复合的分层结构被开发为一种有效的电磁波吸收剂。 MoS2 纳米花提供的大表面积和足够的空隙使得均匀分散的 FeCo 纳米粒子具有单域尺寸，从而增强渗透性和自然共振。大量FeCo/MoS2界面的存在也改善了介电损耗。该复合材料不仅在较宽的频率范围内表现出令人满意的阻抗匹配，而且还提供磁损耗和介电损耗之间的协同效应，以有效耗散波能。该复合材料实现了优异的吸波性能，在 14.4 GHz 时最大反射损耗 (RL) 为 -64.64 dB，在 2 mm 的小厚度下，有效吸收带宽 (RL < -10 dB) 为 7.2 GHz。 ...
Advanced electromagnetic (EM) wave absorbing materials are technologically important with extensively increasing utilization of EM waves in the gigahertz range. Hierarchical structure containing FeCo nanoparticles composited with MoS2 nanoflowers was developed as an effective EM wave absorber. Large surface area and sufficient voids provided by the MoS2 nanoflowers enable uniformly dispersed FeCo nanoparticles with single domain size for enhanced permeability and natural resonance. Existence of the large amount of the FeCo/MoS2 interfaces also improves the dielectric loss. The composite not only exhibits satisfactory impedance matching over a wide frequency range but also provides synergistic effect between magnetic and dielectric loss for effective dissipation of the wave energy. Excellent wave absorption performance was achieved for the composite with a maximum reflection loss (RL) of −64.64 dB at 14.4 GHz and a broad effective absorption bandwidth (RL < −10 dB) of 7.2 GHz at a small thickness of 2 mm. ...