Flexible Broadband Terahertz Modulation Based on Strain-Sensitive MXene Material

Liu, Yangqi; Li, Xiang; Yang, Tingting; Liu, Jingyu; Liu, Bin; Shen, Jingling; Zhang, Bo; Wang, Fu-He

doi:10.3389/fphy.2021.670972

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…Therefore, some THz devices based on Ti 3 C 2 T x MXene have emerged in recent years such as the pump light-operated switch, THz shielding foam or film, , THz absorber, anti-reflection film, and so on. Very recently, Wang et al used an MXene film on a PVAc flexible substrate to realize THz modulation, which shows good flexibility and stretchability. However, in this case, MXene was exposed to air and easily oxidized .…”

Section: Introductionmentioning

confidence: 99%

Highly Flexible Ti₃C₂T_x MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

Feng

Chang

et al. 2023

ACS Appl. Mater. Interfaces

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The dynamic control of terahertz (THz) wave transmission on flexible functional materials is a fundamental building block for wearable electronics and sensors in the THz range. However, achieving high-efficiency THz modulation and low insertion loss is a great challenge while maintaining the excellent flexibility and stretchability of the materials. Herein, we report a Ti 3 C 2 T x MXene/waterborne polyurethane (WPU) membrane prepared by a vacuum-assisted filtration method, which exhibits excellent THz modulation properties across stretching. The hydrophilic Ti 3 C 2 T x MXene and WPU enable the uniform 3D distribution of Ti 3 C 2 T x MXene in the WPU matrix. Particularly, the stretchability with the maximum strain of the membranes can reach 200%, accompanied by dynamic tuning of THz transmittance for more than 90% and an insertion loss as low as −4.87 dB. The giant THz modulation continuously decreases with MXene content per unit area, accompanied by a lower density of the MXene interface and diminished THz absorption during stretching. Such a design opens a pathway for achieving flexible THz modulators with a high modulation depth and low insertion loss, which would be used for THz flexible and wearable devices.

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Section: Introductionmentioning

confidence: 99%

Highly Flexible Ti₃C₂T_x MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

Feng

Chang

et al. 2023

ACS Appl. Mater. Interfaces

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“…The coupling in the cavity interface between the MXene and gold produces high absorption and can be tuned by changes in the incident source polarization or geometric parameters. The effect of terahertz modulation is studied using strain-sensitive MXene on a flexible substrate [28]. The study shows that MXene conductivity can be tuned by using tensile strength on the film, whereas 80% absorption is achieved at the THz band.…”

Section: Introductionmentioning

confidence: 99%

2D MXene Ti3C2Tx Enhanced Plasmonic Absorption in Metasurface for Terahertz Shielding

Ullah¹,

Al‐Hasan²,

Mabrouk³

et al. 2023

Computers, Materials &Amp; Continua

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With the advancement of technology, shielding for terahertz (THz) electronic and communication equipment is increasingly important. The metamaterial absorption technique is mostly used to shield electromagnetic interference (EMI) in THz sensing technologies. The most widely used THz metamaterial absorbers suffer from their narrowband properties and the involvement of complex fabrication techniques. Materials with multifunctional properties, such as adjustable conductivity, broad bandwidth, high flexibility, and robustness, are driving future development to meet THz shielding applications. In this article, a theoretical simulation approach based on finite difference time domain (FDTD) is utilized to study the absorption and shielding characteristics of a two-dimensional (2D) MXene Ti 3 C 2 T x metasurface absorber in the THz band. The proposed metamaterial structure is made up of a square-shaped array of MXene that is 50 nm thick and is placed on top of a silicon substrate. The bottom surface of the silicon is metalized with gold to reduce the transmission and ultimately enhance the absorption at 1-3 THz. The symmetric adjacent space between the MXene array results in a widening of bandwidth. The proposed metasurface achieves 96% absorption under normal illumination of the incident source and acquires an average of 25 dB shielding at 1 THz bandwidth, with the peak shielding reaching 65 dB. The results show that 2D MXene-based stacked metasurfaces can be proven in the realization of low-cost devices for THz shielding and sensing applications.

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“…[24] MXenes are explored in EMI shielding applications, especially terahertz broadband shielding, due to their high electrical conductivity and intrinsic radiation absorption capacity. [8,11,[24][25][26][27][28] Due to their high electrical conductivity, MXenes exhibit multiple reflection mechanisms between layers and contribute to secondary interferences, which can be rectified by either structural design or composite strategies. [18] Various structural designs such as thin film, [4,11,19,29] solid pellet, [30] porous film, [31] foam, [7,8,32,33] sponge, [26,34] fabric, [35] aerogel, [36,37] membrane, [9,16,38] and paint [39] are explored for MXenes to attenuate electromagnetic interference.…”

Section: Introductionmentioning

confidence: 99%

3D Architectural MXene‐based Composite Films for Stealth Terahertz Electromagnetic Interference Shielding Performance

Theja,

Assi,

Huang

et al. 2023

Adv Materials Inter

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The terahertz frequency range is gaining popularity in security, stealth technology, and the future 6G network communication. For the control of severe terahertz electromagnetic interference (EMI) pollution, frequency‐selective stealth‐capable shielding materials are being explored to mask terahertz signals. For the realization of masking terahertz signals, the robustness, lightweight, and shape‐conformable materials with excellent terahertz EMI shielding/absorption are crucial. Here, the study reports the fabrication of 3D symmetric pyramidal architectural MXene composite films with frequency‐selective stealth performance characteristics via the facile drop casting method. With the high absorption capability of 2D MXene layers, the MXene composite films exhibit substantial terahertz stealth performance. 3D pyramidal microstructure design leads to frequency selective surface‐assisted reflection resonance in the frequency range of 0.6–1.1 THz. The MXene composite film demonstrates an outstanding maximum terahertz shielding effectiveness (SE) of up to 70.4 dB and a specific SE of 0.55 dB µm−1. These terahertz SE values exceed all of those for MX‐based shielding material designs reported in the literature. The investigation will open a new direction toward developing terahertz EMI shielding thin films with easy integration into any surface for stealth capabilities.

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Flexible Broadband Terahertz Modulation Based on Strain-Sensitive MXene Material

Cited by 6 publications

References 40 publications

Highly Flexible Ti₃C₂T_x MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

Highly Flexible Ti₃C₂T_x MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

2D MXene Ti3C2Tx Enhanced Plasmonic Absorption in Metasurface for Terahertz Shielding

3D Architectural MXene‐based Composite Films for Stealth Terahertz Electromagnetic Interference Shielding Performance

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Flexible Broadband Terahertz Modulation Based on Strain-Sensitive MXene Material

Cited by 6 publications

References 40 publications

Highly Flexible Ti3C2Tx MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

Highly Flexible Ti3C2Tx MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

2D MXene Ti3C2Tx Enhanced Plasmonic Absorption in Metasurface for Terahertz Shielding

3D Architectural MXene‐based Composite Films for Stealth Terahertz Electromagnetic Interference Shielding Performance

Contact Info

Product

Resources

About

Highly Flexible Ti₃C₂T_x MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss

Highly Flexible Ti₃C₂T_x MXene/Waterborne Polyurethane Membranes for High-Efficiency Terahertz Modulation with Low Insertion Loss