Transform between the permeability and permittivity in the close-packed Ni nanoparticles
Transform between the permeability and permittivity in the close-packed Ni nanoparticles
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DOI：
10.1063/1.3464975
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发表时间：
2010-07
影响因子：
4
通讯作者：
Xuefeng Zhang;P. Guan;X. Dong
中科院分区：
文献类型：
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作者：
Xuefeng Zhang;P. Guan;X. Dong
我们报告了简单的镍纳米粒子/石蜡系统中的异常电磁共振。由纳米粒子的近场相互作用引起的共振出现在~16 GHz，粒子间距离减小至~11 nm。它与从磁导率到介电常数的不寻常的能量转移有关，导致介电增强和磁衰减减弱。这些实验结果可以通过数值模拟很好地建模，证明电场分布随着相互作用距离的减小而增强。这项研究使我们首次实现了纳米复合材料中电磁波的磁导率到介电常数的变换。
We report an anomalously electromagnetic resonance in a simple Ni nanoparticle/paraffin system. The resonance, caused by the near-field interaction of nanoparticles, appears at ∼16 GHz as decreasing the interparticle distance down to ∼11 nm. It is associated with an unusual energy transfer from the permeability to permittivity, resulting in the enhanced dielectric and weakened magnetic attenuations. These experimental results can be well modeled by a numerical simulation, evidencing the enhanced electrical filed distribution as decreasing the interaction distance. This study enables us to first realize the permeability-to-permittivity transform of electromagnetic wave in nanocomposites.