A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor.
A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor.
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DOI：
10.1007/s40820-020-00552-9
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发表时间：
2020-11-20
影响因子：
26.6
通讯作者：
Yuan J
中科院分区：
文献类型：
--
作者：
Zhang M;Han C;Cao WQ;Cao MS;Yang HJ;Yuan J
电子传输特性在电磁 (EM) 衰减中的作用可以推广到其他 EM 功能材料。高效电磁吸收和绿色屏蔽的综合功能开启了电磁多功能材料的视野。揭示了一种基于固有电磁衰减性能和电磁共振耦合效应的新型传感机制。一种材料同时获得高效的电磁（EM）吸收和绿色屏蔽性能是极其不可能的，由于传导损耗和反射之间的竞争，目前尚未见报道。在此，通过纳米微工程定制内部结构，获得了一种具有电磁吸收和绿色屏蔽以及应变传感功能的NiCo2O4纳米纤维。随着纳米纤维电荷传输能力的提高，性能可以从电磁吸收向屏蔽转变，甚至可以并存。特别是，随着电导率的上升，反射损耗从 - 52.72 dB 下降到 - 10.5 dB，而电磁干扰屏蔽效能增加到 13.4 dB，表明两种电磁功能是共存的。此外，基于高电磁吸收，通过图案化NiCo2O4结构的共振耦合设计了应变传感器。这些调节电磁性能和构建器件的策略可以扩展到其他电磁功能材料，以促进电磁驱动器件的发展。本文的在线版本 (10.1007/s40820-020-00552-9) 包含补充材料，可供授权用户使用。
The role of electron transport characteristics in electromagnetic (EM) attenuation can be generalized to other EM functional materials. The integrated functions of efficient EM absorption and green shielding open the view of EM multifunctional materials. A novel sensing mechanism based on intrinsic EM attenuation performance and EM resonance coupling effect is revealed. It is extremely unattainable for a material to simultaneously obtain efficient electromagnetic (EM) absorption and green shielding performance, which has not been reported due to the competition between conduction loss and reflection. Herein, by tailoring the internal structure through nano-micro engineering, a NiCo2O4 nanofiber with integrated EM absorbing and green shielding as well as strain sensing functions is obtained. With the improvement of charge transport capability of the nanofiber, the performance can be converted from EM absorption to shielding, or even coexist. Particularly, as the conductivity rising, the reflection loss declines from − 52.72 to − 10.5 dB, while the EM interference shielding effectiveness increases to 13.4 dB, suggesting the coexistence of the two EM functions. Furthermore, based on the high EM absorption, a strain sensor is designed through the resonance coupling of the patterned NiCo2O4 structure. These strategies for tuning EM performance and constructing devices can be extended to other EM functional materials to promote the development of electromagnetic driven devices. The online version of this article (10.1007/s40820-020-00552-9) contains supplementary material, which is available to authorized users.
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