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janus MXene film with gradient structure for highly efficient terahertz and infrared electromagnetic absorption

Nano Research 2025年第1期18卷 434-442页

作者： Shaodian Yang Weiqiang Huang Zhiqiang Lin Zibo Chen Rongliang Yang Yi Jia Xuebin Liu Rui Wang Zhiping Zeng Yougen Hu Huanjun Chen Xuchun Gui11 State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China China Academy of Aerospace Science and Innovation Beijing 100176China Guangdong Province Key Laboratory of Display Material and Technology Guangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Electromagnetic interference (EMI) shielding inhigh-frequency range, especially the rapidly growing terahertz(THz) frequency range, attracts increasing attention due tothe potential application of terahertz in 6G wirelesscommunication, and security inspection. However, traditionalconductive EMI films typically achieve high shieldingeffectiveness through strong reflection, which may causesecondary pollution to other devices. Here, a gradientstructure strategy was proposed to constructTi_(3)C_(2)Tx/hydroxypropyl methyl cellulose (HPMC) film, in whichthe content of Ti_(3)C_(2)Tx gradually increases along the thicknessdirection, resulting in different conductivity of the two surfaces(surface-M and surface-H) for the film. The obtained gradientfilmexhibits an EMI shielding efficiency of over 48.5 dB in theTHz range (0.2-1.6 THz) at a thickness of 40 μm. Especially,as the THz waves incident from the surface-H to the film, the absorption effectiveness reaches 48.2 dB (average absorbedpower loss up to 91.4%), and the reflection effectiveness is only 0.3 dB. In additions, the gradient-film also demonstrates ahigh absorption rate of 95.5% in the infrared band (2.5-16.7 μm). Moreover, the gradient-film exhibits an excellent tensilestress and Young’s modulus value of 173.1 MPa and 2.8 GPa, respectively. Therefore, the gradient-film proposed in thiswork, with excellent electromagnetic absorption in both THz and infrared band, provides a promising candidate for the nextgenerationEMI shielding applications.

关键词： electromagnetic interference shielding janus film terahertz MXene

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Bioinspired Adaptive,Elastic,and Conductive Graphene Structured Thin-films Achieving High-Efficiency Underwater Detection and Vibration Perception

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Nano-Micro Letters 2022年第4期14卷 129-141页

作者： Qiling Wang Peng Xiao Wei Zhou Yun Liang Guangqiang Yin Qiu Yang Shiao-Wei Kuo Tao Chen Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesZhongguan West Road 1219Ningbo 315201People’s Republic of China School of Chemical Sciences University of Chinese Academy of Sciences19A Yuquan RoadBeijing 100049People’s Republic of China Ningbo New Material Testing and Evaluation Center Co. LtdNingbo 315000People’s Republic of China Department of Material and Optoelectronic Science Center of Crystal ResearchNational Sun Yat-Sen UniversityKaohsiung 804TaiwanPeople’s Republic of China

Underwater exploration has been an attractive topic for understanding the very nature of the lakes and even deep *** recent years,extensive efforts have been devoted to developing functional materials and their integrated devices for underwater information ***,there still remains a great challenge for water depth detection and vibration monitoring in a high-efficient,controllable,and scalable *** by the lateral line of fish that can sensitively sense the water depth and environmental stimuli,an ultrathin,elastic,and adaptive underwater sensor based on Ecoflex matrix with embedded assembled graphene sheets is *** graphene structured thin film is endowed with favourable adaptive and morphable features,which can conformally adhere to the structural surface and transform to a bulged state driven by water *** to the introduction of the graphene-based layer,the integrated sensing system can actively detect the water depth with a wide range of 0.3-1.8 ***,similar to the fish,the mechanical stimuli from land(***,stomping)and water(*** blowing,raining,fishing)can also be sensitively captured in real *** graphene structured thin-film system is expected to demonstrate significant potentials in underwater monitoring,communication,and risk avoidance.

关键词： janus film Water depth detection Vibration perception

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