Recent progress in two-dimensional materials for terahertz protection

Pan, Jianwen; Hu, Haowen; Li, Zechen; Mu, Jing-yang; Cai, Yunxiang; Zhu, Hongwei

doi:10.1039/d0na01046d

Cited by 22 publications

(8 citation statements)

References 122 publications

(219 reference statements)

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“…That is, the absorber is an excellent terahertz wave absorbing material, and an excellent shielding material mainly based on absorption, which can effectively avoid secondary pollution caused by reflection. [84,85] Hence, RGOFGT400 absorber is a high-performance EMA material in terahertz bands. Because of the limitation of resonance frequency, most natural magnetic materials (materials prepared by physical methods or synthesized by chemical methods) have no magnetic response in terahertz bands.…”

Section: Room Temperature Ferromagnetism and Multispectral Compatible...mentioning

confidence: 99%

Temperature‐Induced Self‐Decomposition Doping of Fe₃GeTe₂ to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

et al. 2023

Adv Funct Materials

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Fe3GeTe2 provides an ideal system for the study of itinerant ferromagnetism. However, the Curie temperature (Tc) below room temperature limits its further in‐depth research and wide applications. Here, the Tc of 224 K for Fe3GeTe2 is greatly increased to 496 K for Fe3GeTe2/FeTe2/Fe3Ge by temperature‐induced self‐decomposition doping, contributing to improve the electromagnetic response for enhancing the absorption strength and bandwidth and boosting application potentials at higher temperatures. Then, to achieve the multispectral compatible strong absorption, room temperature ferromagnetic dielectric graphene@Fe3GeTe2/FeTe2/Fe3Ge absorber with 3D porous network structure is prepared by synergistic self‐assembly. It has high Tc of 443 K with strong electromagnetic synergistic loss, achieving reflection loss of −61 dB at 12.6 GHz. Moreover, its absorption loss in the terahertz band (0.1–1.6 THz) is 76 dB, and the average loss is greater than 50.4 dB. Furthermore, the absorber is very potential as stealth skin to efficiently reduce satellite RCS with a multi‐angle and multi‐band manner in the gigahertz and terahertz bands, thus achieving the purpose of stealth. Compared with the reported conventional absorbers, the absorber has a multispectral compatible strong absorption performance covering gigahertz and terahertz bands, thus very promising for electromagnetic protection of electromagnetic communication and space vehicles.

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Section: Room Temperature Ferromagnetism and Multispectral Compatible...mentioning

confidence: 99%

Temperature‐Induced Self‐Decomposition Doping of Fe₃GeTe₂ to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

et al. 2023

Adv Funct Materials

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“…Here synthesized irregularly shaped nanosheets demonstrated broadband THz absorption which we find very useful for the construction of absorbers for future technologies like 6G communication. Presently metamaterials and 2D materials 57 are effectively used as broadband absorbers. Chen et al demonstrated a single-band THz metamaterial absorber with three layers of metallic rings, SiO 2 , and a VO 2 film, which caused absorption by the localized magnetic resonance.…”

Section: Terahertz Absorptionmentioning

confidence: 99%

Broadband THz absorption using nanosheets of Bi₂Te₃ grown on a transparent conductor

et al. 2023

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“…THz absorption is closely related to frequency. Pan et al [37] found that the absorption curve of graphene foam in the frequency band of 0.1-1.6 THz showed a gradient upwards trend with an increasing frequency. In this study, the absorption curve of MWCNT aqueous dispersion also shows a gradient rising trend with the increase of frequency in the 0.1-0.6 THz band under the stimulation of MF, as shown in Figures 12 and 15.…”

Section: Thz Spectral Characteristics Of Mwcnt Aqueous Dispersion Und...mentioning

confidence: 99%

Terahertz Absorption Characteristics of Multiwalled Carbon Nanotube Aqueous Dispersion Measured by Microfluidic Technique

Qian

Zhou

et al. 2022

International Journal of Optics

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Multiwalled carbon nanotubes (MWCNTs) have excellent electronic, mechanical, and structural characteristics; however, their poor dispersion structure and large aggregates severely inhibit their function. A stable MWCNT dispersion in an aqueous solvent has been realized via ultrasonic dispersion and surfactant modification, providing a reference for improving MWCNT dispersion in various materials and solvents. In this study, a cyclic olefin copolymer with high transmittance to terahertz (THz) waves is used to prepare microfluidic chips. Then, the microfluidic and THz technologies are combined to study the THz absorption characteristics of MWCNT aqueous dispersion under different electric field (EF) intensities, magnetic field (MF) intensities, and MF action time. The results show that the THz spectral intensity of MWCNT aqueous dispersion decreases and the absorption coefficient increases with the increase of EF intensity, MF intensity, and MF action time. This phenomenon is explained from a microscopic perspective. The combination of microfluidic and THz technologies provides technical support for studying the characteristics of MWCNT aqueous dispersion and lays a foundation for elucidating the molecular microstructure of MWCNT aqueous dispersion.

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Recent progress in two-dimensional materials for terahertz protection

Abstract: With the wide applications of Terahertz (THz) devices in future communication technology, the THz protection materials are essential to overcome potential threats. Recently, THz metamaterials (MMs) based on two-dimensional (2D)...

Cited by 22 publications

References 122 publications

Temperature‐Induced Self‐Decomposition Doping of Fe₃GeTe₂ to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

Temperature‐Induced Self‐Decomposition Doping of Fe₃GeTe₂ to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

Broadband THz absorption using nanosheets of Bi₂Te₃ grown on a transparent conductor

Terahertz Absorption Characteristics of Multiwalled Carbon Nanotube Aqueous Dispersion Measured by Microfluidic Technique

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Recent progress in two-dimensional materials for terahertz protection

Abstract: With the wide applications of Terahertz (THz) devices in future communication technology, the THz protection materials are essential to overcome potential threats. Recently, THz metamaterials (MMs) based on two-dimensional (2D)...

Cited by 22 publications

References 122 publications

Temperature‐Induced Self‐Decomposition Doping of Fe3GeTe2 to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

Temperature‐Induced Self‐Decomposition Doping of Fe3GeTe2 to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

Broadband THz absorption using nanosheets of Bi2Te3 grown on a transparent conductor

Terahertz Absorption Characteristics of Multiwalled Carbon Nanotube Aqueous Dispersion Measured by Microfluidic Technique

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Temperature‐Induced Self‐Decomposition Doping of Fe₃GeTe₂ to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

Temperature‐Induced Self‐Decomposition Doping of Fe₃GeTe₂ to Achieve Ultra‐High Tc of 496 K for Multispectral Compatible Strong Electromagnetic Wave Absorption

Broadband THz absorption using nanosheets of Bi₂Te₃ grown on a transparent conductor