Abstract Two types of nanocomposites based on multiwalled carbon nanotubes (MWCNTs) decorated with metallic nickel nanoparticles (NiNPs) possessing very different size distributions (13 vs. 130 nm) were produced using novel synthetic techniques. The obtained nanocomposites were dispersed in a polycarbonate (PC) matrix to produce thin (~500 μm) composite films. For the first time, we show that such films possess clear ferromagnetic resonances in the ultra-high frequency (UHF) and L microwave regions. Furthermore, we prove that their natural ferromagnetic (FMR) frequency is lowered when using nanocomposites with smaller NiNPs. These results could be exploited to design selective dual-band filters for telecommunications applications.

中文翻译：

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在多壁碳纳米管上负载尺寸可控的镍纳米颗粒的纳米复合材料可实现高效的频率选择性微波吸收

摘要 使用新型合成技术生产了两种基于多壁碳纳米管 (MWCNT) 的纳米复合材料，其中金属镍纳米颗粒 (NiNPs) 装饰有非常不同的尺寸分布（13 和 130 nm）。将获得的纳米复合材料分散在聚碳酸酯 (PC) 基质中以生产薄 (~500 μm) 复合膜。我们首次证明这种薄膜在超高频 (UHF) 和 L 微波区域具有清晰的铁磁共振。此外，我们证明当使用具有较小 NiNP 的纳米复合材料时，它们的自然铁磁 (FMR) 频率会降低。这些结果可用于设计用于电信应用的选择性双频带滤波器。