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Science China Materials 2024年第2期67卷 629-641页

作者：卞敬周兴成周翔马林峰朱先军李建民刘淑娟赵强 College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly TechnologyNanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China

具有动态可调电磁屏蔽性能的电磁干扰屏蔽材料备受关注,但其目前仍然存在制备复杂、厚度大、触发方式不便、调节范围窄等缺点.我们通过将尖刺镍微粒精确地分散到聚二甲基硅氧烷基体中形成预连接的链状结构,制备出了具有可开关电磁屏蔽... 详细信息

具有动态可调电磁屏蔽性能的电磁干扰屏蔽材料备受关注,但其目前仍然存在制备复杂、厚度大、触发方式不便、调节范围窄等缺点.我们通过将尖刺镍微粒精确地分散到聚二甲基硅氧烷基体中形成预连接的链状结构,制备出了具有可开关电磁屏蔽性能的弹性体材料.弹性体在机械拉伸和释放过程中表现出连续和可逆的电磁干扰屏蔽性能.原始弹性体具有良好的阻抗匹配和低介电损耗,允许大部分电磁波通过.拉伸使预连接的短链彼此接触,在内部形成大量的微尺度导电网络,显著增强了电导损耗能力,实现了较强的电磁干扰屏蔽能力.此外,我们通过无线应变传感系统验证了智能电磁干扰屏蔽弹性体的应用潜力,证明了可穿戴智能电磁干扰屏蔽精确监测人体运动的可能性.

关键词： adjustable electromagnetic interference shielding conductive elastomer electromagnetic sensing negative piezoresistivity

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A multifunctional stealthy material for wireless sensing and active camouflage driven by configurable polarization

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Journal of Materials Science & Technology 2023年第1期132卷 42-49页

作者： Min Zhang Mao-Sheng Cao Qiang-Qiang Wang Xi-Xi Wang Wen-Qiang Cao Hui-Jing Yang Jie Yuan School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Department of Physics Beijing Technology and Business UniversityBeijing 100048China School of Electrical and Electronic Engineering Nanyang Technological University639798Singapore Department of Physics Tangshan Normal UniversityTangshan 063000China School of Information Engineering Minzu University of ChinaBeijing 100081China

The dipole species transformation and polarization relaxation configuration are achieved by changing the cobalt ion stoichiometry,which precisely tailors the electromagnetic attenuation performance of bismuth iron cobalt *** the stoichiometric ratio of Fe:Co is 19:1,the optimal reflection loss reaches-60 *** high electromagnetic attenuation performance significantly improve the linear sensitivity of the strain response and active customized stealth capability of the designed multifunctional capacitor-like ***,the wireless multifunctional design integrates energy attenuaten of electromagnetic wave with the wireless sensing and active camouflage functions for the first *** work provides an important step for the realization of electromagnetical multifunctional applications including electromag-netic protection and electromagnetic sensing in artificial beings,medical health and even space travel.

关键词： electromagnetic absorption Polarization relaxation electromagnetic sensing Active camouflage

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Oriented magnetic liquid metal-filled interlocked bilayer films as multifunctional smart electromagnetic devices

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Nano Research 2023年第1期16卷 1764-1772页

作者： Jinjin Li Yue Zhang Xufeng Li Chunyan Chen Haihan Zou Peng Yi Xiaofang Liu Ronghai Yu School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Smart electromagnetic functional devices prepared based on electromagnetic wave responsive materials will provide more convenience for human life in the ***,we prepare oriented magnetic liquid metal droplet-filled polydimethylsiloxane films with micropillar array patterned surfaces,and further assemble them into bilayer films with interlocked *** compressed,the increase in conductivity of the film due to the tunneling effect between microarrays and the elongation of liquid metal droplets leads to a rapid increase in electromagnetic interference shielding ***,a tunable electromagnetic interference shielding material with high sensitivity and wide control range is obtained,which has potential applications in electromagnetic wave control systems and intelligent electromagnetic protection ***,we assemble a strain sensor and a magnetic sensor,which can precisely sense pressure and magnetic field according to changes in electromagnetic signal and electrical signal,respectively.

关键词： magnetic liquid metal electromagnetic interference shielding interlocked structure electromagnetic sensing magnetic sensing

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electromagnetic and Optical Methods for Measurements of Salt Concentration of Water

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Journal of electromagnetic Analysis and Applications 2014年第6期6卷 130-139页

作者： Ф.A.Tengesdal B.L.Hauge L.E.Helseth Department of Physics and Technology University of BergenBergenNorway The Michelsen Centre of Industrial Measurement Science and Technology BergenNorway

Sensors for monitoring the salinity of water are useful tools in both environmental sciences and chemical engineering. Sensors based on a large variety of principles have been developed. Here we describe the design and testing of two different, noninvasive measurement methods for monitoring the salt concentration of water. The first method is based measurements of the refractive index using a folded-path optical refractometer, while the second utilizes an electromagnetic resonator, consisting of a magnetic coil and a capacitor, which is brought to resonance by an external magnetic field source. It is demonstrated that the folded-path optical refractometer allows one to monitor changes in salt concentration down to 1 mM in the range between 0 and 0.7 M, whereas the electromagnetic resonator has the capability of monitoring concentration changes as small as 0.3 mM over the more limited range between 0 and 5 mM.

关键词： Salinity electromagnetic sensing Optical sensing

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