Applied Physics Letters · 2006 · 815 citations · 17 references
Natural SciencesMaterials EngineeringMaterials ScienceNanomaterialsNanotechnologySurface ScienceCarbon NanomaterialsInorganic NanoparticlesMicrowave MaterialsNanomaterial CharacterizationNanoparticle SurfacesSurface Functionalization Of NanomaterialsCarbon-based NanomaterialsCharacterization Of Microwave MaterialsComplex PermittivityMicrowave Absorbing MaterialsMicrowave AbsorptionPermittivityResistivityResonance
The carbon-coated Ni(C) nanocapsules were prepared by a modified arc-discharge method in methane atmosphere. Its electromagnetic parameters were measured at 2–18GHz. It is observed that the natural resonance which appeared at 5.5GHz is dominant among microwave absorption properties of Ni(C) nanocapsules, as the consequence of the increased surface anisotropic energy for nanosized particles. The measured relative complex permittivity indicates that a high resistivity existed in Ni(C) nanocapsules samples. The maximum reflection loss of Ni(C) nanocomposites can reach 32dB at 13GHz with 2mm in thickness. The microwave absorptive mechanisms of Ni(C) nanocapsule absorbent were discussed.
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Dispersion and absorption in magnetic ferrites at frequencies above one Mc/s
J.L. Snoek · Physica · 1948 · 960 citations