The smallest anions entrapped mayenite electride@graphitic carbon core-shells reinforced with superparamagnetic Fe3O4 delivers unrivalled high-frequency microwave absorption

Lalan, Vidhya; Subodh, G.

doi:10.1016/j.cej.2023.141857

Cited by 7 publications

(3 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This configuration enhances internal electron transmission, thereby achieving an exceptional attenuation performance. The improved impedance matching performance and attenuation capabilities render MCHS-3 wt % with outstanding EMW absorption performance. − As the filling amount continues to increase, the impedance-matching performance deteriorates consistently. Despite the increasing attenuation performance, the composite failed to exhibit good EMW absorption characteristics.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanospheres for Electromagnetic Wave Absorption and Shielding

Wu,

Liu,

Zhao

2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Here, composites filled with carbon nanospheres of different morphologies exhibit the same electromagnetic wave (EMW) absorption and loss mechanisms when they possess the same carbon content. Conductive loss is their primary EMW absorbing mechanism, while the effect of polarization loss can be ignored entirely. Composites with a filling amount lower than the percolation threshold of the carbon nanospheres and certain conductivity possess excellent EMW absorbing behavior, while composites with a filling amount close to or higher than the percolation threshold reveal outstanding EM interference (EMI) shielding. The minimum reflection loss (RL min ) and maximum effective absorption bandwidth (EAB max ) of mesoporous carbon hollow nanospheres (MCHS) reach −50.52 dB and 5.90 GHz at an ultralow filling amount of 3 wt %. The EMI shielding effectiveness (SE) of the MCHS is as high as 118.23 dB at a fill level of 12 wt %, with an average SE of 84.50 dB. Among them, conductive loss has a more significant contribution to low-frequency EMW absorption. Frequency-selective EMW absorbing performance can be obtained by simply adjusting the material conductivity. Compared with the currently reported carbon nanomaterials, the carbon nanospheres in this study reveal significant advantages in EM-resisting performances and unique lowfilling characteristics.

show abstract

Section: Resultsmentioning

confidence: 99%

Carbon Nanospheres for Electromagnetic Wave Absorption and Shielding

Wu,

Liu,

Zhao

2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The earliest materials used were mainly metals such as copper, aluminum, and nickel, all of which possess high electrical conductivity and good mechanical properties and can be used as shielding materials by exploiting reflection . Ceramics, ferrites, metal magnets, and their composites have also been used to attenuate harmful EM waves. , With the demand for lightweight, low-cost, and easy-processed shielded materials, polymer composites have been widely researched recently for applications in EMI shielding. − …”

Section: Introductionmentioning

confidence: 99%

“…3 Ceramics, ferrites, metal magnets, and their composites have also been used to attenuate harmful EM waves. 4,5 With the demand for lightweight, low-cost, and easyprocessed shielded materials, polymer composites have been widely researched recently for applications in EMI shielding. 6−11 Schelkunoff's plane wave electromagnetic transmission theory is commonly used to explain the electromagnetic shielding mechanism.…”

Section: Introductionmentioning

confidence: 99%

Composites of Non-Woven Poly p-Phenylene Terephthalamide and Fe₃O₄-Decorated Ti₃C₂T_x MXene Nanosheets Coated with Ag Nanoparticles for Electromagnetic Interference Shielding

Sun,

Guo,

et al. 2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

To avoid harm to humans and devices, developing electromagnetic interference (EMI) shielding materials possessing high shielding efficiency and enhanced electromagnetic (EM) wave absorption properties is of fundamental importance. Preventing threats caused by EMI and reducing the secondary pollution of EM waves are critical requirements for materials. In the research described here, composites of Ag nanoparticles coated with poly pphenylene terephthalamide (PPTA) nonwoven and Fe 3 O 4 decorated MXene nanosheets were prepared by electroless silver plating and Fe 3 O 4 -MXene deposition. The top and bottom layers of the composites were Fe 3 O 4 nanoparticle-decorated MXene nanosheets and silicone rubber, while the middle layer consisted of a Ag nanoparticle-coated PPTA nonwoven fabric. The formation of the sandwich structure, the electromagnetic compounding, and the porous structure of the PPTA nonwoven fabric coated with Ag nanoparticles endowed the composites with excellent EMI shielding properties. An EMI shielding effectiveness of 89.92 dB was achieved in the frequency range of 8.2−12.4 GHz. The absorption coefficient A of the composites reached 0.203, which was noticeably enhanced compared with 0.013 of Ag nanoparticlecoated PPTA nonwoven fabric.

show abstract

Tailoring properties of Ni0.50Co0.50DyxFe2–xO4 ceramics using microwave non-thermal plasma for high-frequency devices

Munir,

Naz,

Shukrullah

et al. 2024

Appl. Phys. A

View full text Add to dashboard Cite

The smallest anions entrapped mayenite electride@graphitic carbon core-shells reinforced with superparamagnetic Fe3O4 delivers unrivalled high-frequency microwave absorption

Cited by 7 publications

References 83 publications

Carbon Nanospheres for Electromagnetic Wave Absorption and Shielding

Carbon Nanospheres for Electromagnetic Wave Absorption and Shielding

Composites of Non-Woven Poly p-Phenylene Terephthalamide and Fe₃O₄-Decorated Ti₃C₂T_x MXene Nanosheets Coated with Ag Nanoparticles for Electromagnetic Interference Shielding

Tailoring properties of Ni0.50Co0.50DyxFe2–xO4 ceramics using microwave non-thermal plasma for high-frequency devices

Contact Info

Product

Resources

About

The smallest anions entrapped mayenite electride@graphitic carbon core-shells reinforced with superparamagnetic Fe3O4 delivers unrivalled high-frequency microwave absorption

Cited by 7 publications

References 83 publications

Carbon Nanospheres for Electromagnetic Wave Absorption and Shielding

Carbon Nanospheres for Electromagnetic Wave Absorption and Shielding

Composites of Non-Woven Poly p-Phenylene Terephthalamide and Fe3O4-Decorated Ti3C2Tx MXene Nanosheets Coated with Ag Nanoparticles for Electromagnetic Interference Shielding

Tailoring properties of Ni0.50Co0.50DyxFe2–xO4 ceramics using microwave non-thermal plasma for high-frequency devices

Contact Info

Product

Resources

About

Composites of Non-Woven Poly p-Phenylene Terephthalamide and Fe₃O₄-Decorated Ti₃C₂T_x MXene Nanosheets Coated with Ag Nanoparticles for Electromagnetic Interference Shielding