Electromagnetic wave absorption performance of Graphene/SiC nanowires based on graphene oxide

Li, Xiaopeng; Li, Zhaoqian; Que, Longkun; Ma, Yongjun; Zhu, Lingling; Pei, Chonghua

doi:10.1016/j.jallcom.2020.155172

Cited by 36 publications

(3 citation statements)

References 70 publications

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“…Dipole polarizations were induced by the defect dipoles caused by the functional groups in graphitic carbon and the extensive interface between amorphous carbon and graphitic carbon. Such phenomenon can be commonly observed in previous works. − …”

Section: Resultssupporting

confidence: 73%

Carbon Nanotubes with Tailored Amorphous Graphitic Components for Electromagnetic Wave Absorption

Han

Ouyang

et al. 2022

ACS Appl. Nano Mater.

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Carbon nanoframeworks have received considerable attention in electromagnetic wave absorption (EWA), benefiting from their low mass density, cost effectiveness, environmental friendliness, and strong mechanical strength. Although various works have been performed to achieve carbon nanostructures with favorable electromagnetic behavior, the mechanism behind the application is still ambiguous, typically the effect of amorphous and graphitic components on the EWA performances. Accordingly, we modulate carbon nanotubes with a controllable amorphous–graphitic ratio based on a facile carbonization strategy. With the increased processing temperature, CNTs show increased graphitic formation simultaneously with the removal of amorphous carbon. Meanwhile, the N-containing groups are also converted from defective N toward graphitic N. The optimum performance is achieved with a strong reflection loss (−61.25 dB) and broad bandwidth (6.24 GHz) at 700 °C. Simulation is further applied to demonstrate the effects of CNTs with different amorphous–graphitic ratios. Such work elucidates the impact mechanism of amorphous and graphitic carbon on the electromagnetic behavior, resulting in the scalable application of carbon materials.

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Section: Resultssupporting

confidence: 73%

Carbon Nanotubes with Tailored Amorphous Graphitic Components for Electromagnetic Wave Absorption

Han

Ouyang

et al. 2022

ACS Appl. Nano Mater.

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“…Of particular interest are the various methods for depositing graphene and carbon nanostructures on dielectric substrates. An important technological problem is to prepare a graphene layer on silicon carbide and silica substrates for future applications in microelectronics and in communications systems (absorbers, antennas) [2].…”

Section: Introductionmentioning

confidence: 99%

Deposition of carbon nanolayers by PECVD on ceramic substrates

Ivanov,

Marinov,

Popov

et al. 2024

J. Phys.: Conf. Ser.

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Graphene layers and nanostructures were deposited on silicon dioxide (SiO2/Si) and silicon carbide (SiC) substrates at low gas pressure (1 – 5 torr) by microwave discharge PECVD (Plasma Enhanced Chemical Vapor Deposition). The advantage of this method is the relatively low temperature (600-700°C) of the substrate in the deposition process. The diffusion processes of hydrocarbon radicals on the surface of the substrates have a significant effect on the homogeneity of deposited structures. The deposited graphene nanotubes on SiC were analyzed by scanning electron microscope (SEM) and Raman spectroscopy is applied for characterization of the graphene layers. The deposited carbon layers on SiO2 were analyzed by atomic force microscope and their thickness (12-20 nm) were determined.

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“…Till now, plenty of graphene composite aerogels (GCAs) have been developed by incorporating semiconducting compounds, such as SiO 2 , 10 TiO 2 , 11 ZnO, 12 and SiC, 13 conducting polymers, such as polypyrrole, 14 ethylenedioxythiophene):poly(styrenesulfonate), 15 and polyaniline, 16 and other advanced nanomaterials, such as MOFs 17 and MXene. 18 .…”

Section: Introductionmentioning

confidence: 99%

Graphene/Polyimide Composite Aerogels for Superior Electromagnetic-Wave-Absorbing Materials with High Thermal Stability and Absorption Effectiveness

Li,

Huang,

Gao

et al. 2024

ACS Appl. Polym. Mater.

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Graphene/polyimide composite aerogels (GPIs) were fabricated through a one-pot solvothermal method and then underwent heat treatment at 350 °C to obtain GPIs (350). GPIs (350) exhibits prominent electromagnetic-wave-absorbing properties. Specifically, the minimum reflection loss can reach −75.90 dB with a thickness of 3.75 mm, and the effective absorption bandwidth reaches 6.44 GHz with a thickness of 2.70 mm. The actual dosage of graphene oxide in the GPIs (350) absorbers is low to 3 wt %, showing high effectiveness in absorbing electromagnetic waves. Notably, GPIs (350) also displays excellent thermal stability up to 415 °C. Polyimide is proven to tune the electromagnetic properties and provide much graphene−polyimide interface. The composition of graphene and polyimide, the three-dimensional morphology, and post-heat treatment are the perfect match to guarantee excellent comprehensive electromagnetic wave absorption properties. The present work provides a much more facile and effective approach to fabricating electromagnetic-wave-absorbing materials with exceptional properties through tuning engineering polymers.

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Electromagnetic wave absorption performance of Graphene/SiC nanowires based on graphene oxide

Cited by 36 publications

References 70 publications

Carbon Nanotubes with Tailored Amorphous Graphitic Components for Electromagnetic Wave Absorption

Carbon Nanotubes with Tailored Amorphous Graphitic Components for Electromagnetic Wave Absorption

Deposition of carbon nanolayers by PECVD on ceramic substrates

Graphene/Polyimide Composite Aerogels for Superior Electromagnetic-Wave-Absorbing Materials with High Thermal Stability and Absorption Effectiveness

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