Zhi-cheng Shi, Run-hua Fan, Ke-lan Yan, Kai Sun, Meng Zhang, Cheng-guo Wang, Xiang-fa Liu and Xi-hua Zhang Preparation of Iron Networks Hosted in Porous Alumina with Tunable Negative Permittivity and Permeability Advanced Functional Materials 23
Iron particles are hosted in porous alumina via a facile impregnation-reduction process. When the iron content exceeds the percolation threshold, iron networks are formed. The iron content and reduction temperature can easily tune the amplitude and frequency range of the negative permittivity and permeability. The impregnation-reduction process has great potential for the preparation of random composites with tunable double negative properties.
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