Journal ArticleDOI
Laminated magnetic graphene with enhanced electromagnetic wave absorption properties
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TLDR
In this paper, the authors reported a facile solvothermal route to synthesize laminated magnetic graphene and showed that there have significant changes in the electromagnetic properties of magnetic graphene when compared with pure graphene.Abstract:
Graphene is highly desirable as an electromagnetic wave absorber because of its high dielectric loss and low density. Nevertheless, pure graphene is found to be non-magnetic and contributes to microwave energy absorption mostly because of its dielectric loss, and the electromagnetic parameters of pure graphene, which are out of balance, result in a bad impedance matching characteristic. In this paper, we report a facile solvothermal route to synthesize laminated magnetic graphene. The results show that there have been significant changes in the electromagnetic properties of magnetic graphene when compared with pure graphene. Especially the dielectric Cole–Cole semicircle suggests that there are Debye relaxation processes in the laminated magnetic graphene, which prove beneficial to enhance the dielectric loss. We also proposed an electromagnetic complementary theory to explain how laminated magnetic graphene, with the combined advantages of graphene and magnetic particles, helps to improve the standard of impedance matching for electromagnetic wave absorbing materials. Besides, microwave absorption properties indicate that the reflection loss of the as-prepared composite is below −10 dB (90% absorption) at 10.4–13.2 GHz with a coating layer thickness of 2.0 mm. This further confirms that the nanoscale surface modification of magnetic particles on graphene makes graphene-based composites have a certain research value in electromagnetic wave absorption.read more
Citations
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Highly stretchable and self-foaming polyurethane composite skeleton with thermally tunable microwave absorption properties.
Ye Fengchao,Xingsheng He,Jiajia Zheng,Yancheng Li,Mengjia Li,Zhonglue Hu,Sisi Wang,Guoxiu Tong,Xiping Li +8 more
TL;DR: In this article, the authors proposed a facile strategy to fabricate stretchable, magnetic composite skeletons by incorporating the tadpole-like CNTs@Fe3O4 nanoparticles into self-foaming polyurethane (PU) matrix and the electromagnetic responsive properties under heating-cooling cycle in a temperature range of 253~333K.
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Synthesis of FeCo-reduced graphene oxide composite and its magnetic and adsorption properties
TL;DR: In this paper, the composite of FeCo and reduced graphene oxide (RGO) was synthesized via a facile ultrasonic chemical method, and the composite exhibited excellent magnetic properties with specific saturation magnetization (M s ) of 78.06 µm/g and strong adsorption for Rhodamine-B.
Journal ArticleDOI
Facial Synthesis of Zn-doped Fe3O4 with Enhanced Electromagnetic Wave Absorption Performance in S and C Bands
TL;DR: In this paper, Zn-doped Fe3O4 nanoparticles were successfully synthesized by a facile solvothermal method in the presence of sodium dodecyl sulfate (SDS), and the morphology, magnetic properties and electromagnetic wave absorbing properties of these materials were characterized.
Journal ArticleDOI
Sodiumphosphinate-assisted synthesis of P-doped FeCo microcubes and their electromagnetic scattering characteristics
TL;DR: In this paper, P-doped FeCo microcubes are fabricated through a facile solvothermal method using sodiumphosphinate (NaH2PO2·H2O) as assisted agent.
Book ChapterDOI
Graphene/Polymer Nanocomposites as Microwave Absorbers
TL;DR: In this paper, the authors proposed the use of graphene-filled polymer nanocomposites for microwave absorption in high frequency electronics, which is the backbone of present day communication systems.
References
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Journal ArticleDOI
Raman Spectrum of Graphite
F. Tuinstra,J. L. Koenig +1 more
TL;DR: Raman spectra are reported from single crystals of graphite and other graphite materials as mentioned in this paper, and the Raman intensity of this band is inversely proportional to the crystallite size and is caused by a breakdown of the k-selection rule.
Journal ArticleDOI
Detection of individual gas molecules adsorbed on graphene
Fred Schedin,A. K. Geim,Sergey V. Morozov,Ernie W. Hill,Peter Blake,Mikhail I. Katsnelson,K. S. Novoselov +6 more
TL;DR: In this paper, it was shown that micrometre-size sensors made from graphene are capable of detecting individual events when a gas molecule attaches to or detaches from graphene's surface.
Journal ArticleDOI
Shape-Controlled Synthesis of Gold and Silver Nanoparticles
Yugang Sun,Younan Xia +1 more
TL;DR: Monodisperse samples of silver nanocubes were synthesized in large quantities by reducing silver nitrate with ethylene glycol in the presence of poly(vinyl pyrrolidone) (PVP), characterized by a slightly truncated shape bounded by {100, {110}, and {111} facets.
Journal ArticleDOI
Detection of Individual Gas Molecules Absorbed on Graphene
TL;DR: In this paper, it was shown that micrometre-size sensors made from graphene are capable of detecting individual events when a gas molecule attaches to or detaches from graphenes surface.