Only Ku-band microwave absorption by Fe3O4/ferrocenyl-CuPc hybrid nanospheres

Wei, Junji; Zhao, Rui; Liu, Xiaobo

doi:10.1016/j.jmmm.2012.05.042

Cited by 16 publications

(4 citation statements)

References 33 publications

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“…It is worth noting that the magnetic hysteresis and domain-wall displacement usually appears in a very low frequency range (1–100 MHz) [ 74 ], and then the influences of the hysteresis and the domain-wall displacement can be ignored. If the magnetic loss from eddy current loss, the C 0 ( C 0 = μ" ( μ' ) -2 f -1 = 2 πμ 0 σd 2 /3) values should be constants when the frequency varies, this is called the skin-effect criterion [ 75 ]. However, the value of C 0 decreases drastically as a function of frequency in the range of 0.5–4.5 GHz (Fig.…”

Section: Resultsmentioning

confidence: 99%

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Chen

Yang

et al. 2016

Nanoscale Res Lett

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Pure metallic nickel submicron spheres (Ni-SSs), flower-like nickel nanoflakes, and hollow micrometer-sized nickel spheres/tubes were controllably synthesized by a facile and efficient one-step solvothermal method with no reducing agent. The characteristics of these nickel nanostructures include morphology, structure, and purification. Possible synthesis mechanisms were discussed in detail. The resultant Ni-SSs had a wide diameter distribution of 200~800 nm through the aggregation of small nickel nanocrystals. The ferromagnetic behaviors of Ni-SSs investigated at room temperature showed high coercivity values. Furthermore, the microwave absorption properties of magnetic Ni-SSs were studied in the frequency range of 0.5-18.0 GHz. The minimum reflection loss reached −17.9 dB at 17.8 GHz with a thin absorption thickness of 1.2 mm, suggesting that the submicron spherical structures could exhibit excellent microwave absorption properties. More importantly, this one-pot synthesize route provides a universal and convenient way for preparation of larger scale pure Ni-SSs, showing excellent microwave absorption properties.

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Section: Resultsmentioning

confidence: 99%

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Chen

Yang

et al. 2016

Nanoscale Res Lett

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“…More importantly, each absorber layer thickness of Ni-P 9 /T 200 /H 15 corresponds to distinctly different absorption peak. This allows potential application in the notch filter [ 40 ], which is a sort of special electromagnetic shielding device that can rapidly attenuate the input signal at a certain frequency. The above results indicate that the Ni-P 9 /T 200 /H 15 sample is an ideal microwave absorbing material with multi-band and strong absorption performance, which has extensive application.…”

Section: Resultsmentioning

confidence: 99%

Influence of PEG Stoichiometry on Structure-Tuned Formation of Self-Assembled Submicron Nickel Particles

Wang

Yang

et al. 2018

Materials

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Self-assembled submicron nickel particles were successfully synthesized via the one-step surfactant-assisted solvothermal method. The impact of surfactant and reducing agent stoichiometry is investigated in this manuscript. Different morphologies and structures of Ni particles, including flower-like nanoflakes, hydrangea-like structures, chain structures, sphere-like structures, and hollow structures were prepared through different processing conditions with two parameters such as temperature and time. Based on scanning electron microscopy (SEM), X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and vibrating sample magnetometry (VSM), the submicron nickel particles show good saturation magnetization and excellent thermal stabilities with a possible growth mechanism for the variety of the structure-tuned formation. Importantly, the microwave absorption properties of the submicron nickel particles were studied. The lowest reflection loss of Ni-P9/T200/H15 with a thin layer thickness of 1.7 mm can reach −42.6 dB at 17.3 GHz.

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“…Electromagnetic parameters were measured by a vector network analyzer (Agilent N5247A) via the reflection/transmission method in the frequency range of 1-18 GHz. 17 The real and imaginary parts of complex permittivity were calculated based on Nicolson-Ross-Weir (NRW) method. 18,19 To reduce errors, all values were obtained by averaging the data measured for five different samples.…”

Section: Methodsmentioning

confidence: 99%

Enhanced microwave absorption performance of lightweight absorber based on reduced graphene oxide and Ag-coated hollow glass spheres/epoxy composite

Wang

Sun

Chen

et al. 2015

Journal of Applied Physics

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Only Ku-band microwave absorption by Fe3O4/ferrocenyl-CuPc hybrid nanospheres

Cited by 16 publications

References 33 publications

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Influence of PEG Stoichiometry on Structure-Tuned Formation of Self-Assembled Submicron Nickel Particles

Enhanced microwave absorption performance of lightweight absorber based on reduced graphene oxide and Ag-coated hollow glass spheres/epoxy composite

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