Microwave absorbing characteristics of porphyrin derivates: a loop of conjugated structure

Dogari, Haniyeh; Peymanfar, Reza; Ghafuri, Hossein

doi:10.1039/d3ra03927g

Cited by 21 publications

(7 citation statements)

References 116 publications

(161 reference statements)

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“…The small spikes on the surface act like antennas and can improve the ability to absorb and transmit EMWs. Meanwhile, analogous to ribonucleic acid, CP with its helical structure can produce cross-polarization [ 49 , 50 ]; thus, both virus-shaped particles and CP can enhance the loss of EMWs. The virus-shaped particles with a large size also exhibit a customized dual-soft-magnetic effect that enlarges the magnetic network from nanometer scale to centimeter scale, which makes FeCo/Fe 3 O 4 /NC-600 more suitable for centimeter waves and facilitates the loss of EMWs [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

Metal–Organic Gel Leading to Customized Magnetic-Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation Performances

Li,

Hu,

Xiong

et al. 2023

Nano-Micro Lett.

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Metal–organic gel (MOG) derived composites are promising multi-functional materials due to their alterable composition, identifiable chemical homogeneity, tunable shape, and porous structure. Herein, stable metal–organic hydrogels are prepared by regulating the complexation effect, solution polarity and curing speed. Meanwhile, collagen peptide is used to facilitate the fabrication of a porous aerogel with excellent physical properties as well as the homogeneous dispersion of magnetic particles during calcination. Subsequently, two kinds of heterometallic magnetic coupling systems are obtained through the application of Kirkendall effect. FeCo/nitrogen-doped carbon (NC) aerogel demonstrates an ultra-strong microwave absorption of − 85 dB at an ultra-low loading of 5%. After reducing the time taken by atom shifting, a FeCo/Fe3O4/NC aerogel containing virus-shaped particles is obtained, which achieves an ultra-broad absorption of 7.44 GHz at an ultra-thin thickness of 1.59 mm due to the coupling effect offered by dual-soft-magnetic particles. Furthermore, both aerogels show excellent thermal insulation property, and their outstanding radar stealth performances in J-20 aircraft are confirmed by computer simulation technology. The formation mechanism of MOG is also discussed along with the thermal insulation and electromagnetic wave absorption mechanism of the aerogels, which will enable the development and application of novel and lightweight stealth coatings.

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Section: Resultsmentioning

confidence: 99%

Metal–Organic Gel Leading to Customized Magnetic-Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation Performances

Li,

Hu,

Xiong

et al. 2023

Nano-Micro Lett.

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“…[34][35][36] The permeability is mainly sourced from the natural resonance and eddy loss caused by the magnetic sol. 37,38 The EM parameters of the foams with different weight percentages of absorbers show similar trends, but as all weight percentages are small, the EM parameters are relatively low. The ε 0 and its amplitude-rise rate increase with increasing absorbent wt % (Figure 2A), indicating that increasing the wt% of the absorber enhances the electric-field energy storage capacity of the RAPMI foam.…”

Section: Electromagnetic Characteristicsmentioning

confidence: 90%

Preparation, testing, and design of a radar‐absorption polymethacrylimide foam

Song,

Yuan,

Duan

et al. 2023

Journal of Polymer Science

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This article presents a new radar‐absorbing polymethacrylimide (RAPMI) foam, measures the electromagnetic (EM) parameters of the foam, and establishes mechanical prediction models. The reflection loss (RL) curves of foams with different thicknesses and absorbent weight ratios (wt%) were analyzed along with the shear and compression behaviors of the RAPMI foam. Gibson models of the RAPMI foam were then established. The parametric effects of the absorption performance of multilayered RAPMI foams were analyzed using multimedia transmission‐line theory. A numerically designed RAPMI foam exhibited excellent EM performance while retaining the outstanding mechanical properties of the original foam. The laminated foam can theoretically achieve a full‐band effective absorption (RL ≤ −10 dB) of 2–18 GHz with a minimal thickness of 33.1 mm.

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“…50 The mechanism of EMI shielding is similar to what has been proposed by several searchers, where the contribution from reflectance as well as absorbance has been correlated with shielding efficiency. 51,52…”

Section: Emi Shielding Studiesmentioning

confidence: 99%

Novel synthesis of polyaniline/tellurium (PANI/Te) nanocomposite and its EMI shielding behavior

Yadav,

Mohammad,

Khanna

2023

Mater. Adv.

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Microwave absorbing characteristics of porphyrin derivates: a loop of conjugated structure

Abstract: Microwave absorbing architectures have gained a great deal of attention due to their widespread application in diverse fields, especially in refining electromagnetic pollution.

Cited by 21 publications

References 116 publications

Metal–Organic Gel Leading to Customized Magnetic-Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation Performances

Metal–Organic Gel Leading to Customized Magnetic-Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation Performances

Preparation, testing, and design of a radar‐absorption polymethacrylimide foam

Novel synthesis of polyaniline/tellurium (PANI/Te) nanocomposite and its EMI shielding behavior

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