21-01-2021 | Original Research Article
Synthesis and Broadband Absorption of Fe-Based Nanoparticles in the Ku-Band
Le Thi Hong Phong, Bui Xuan Khuyen, Ta Ngoc Bach, Bui Son Tung, Do Khanh Tung, Ngo Thi Hong Le, Vu Dinh Lam, Nguyen Thanh Tung, Do Hung Manh
Journal of Electronic Materials
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In this work, we propose a simple method to characterize the broadband absorption of different sizes of iron (Fe) nanoparticles. The absorption feature in the Ku-band (14–18 GHz) of paint/Fe nanocomposites with different Fe concentration is systematically investigated. The experiments confirm that the proposed samples can maintain a broadband absorption (with A > 60%) from 14.6 GHz to 18 GHz and from 15.2 GHz to 18 GHz for the as-milled Fe proportions of 5.0 g and 7.0 g, respectively, in a total thickness of only 2.0 mm. Furthermore, the absorption properties of the un-milled Fe nanoparticles samples are also characterized, which show lower absorption (A < 50%) than the as-milled nanoparticles. Our results contribute to the characterization of the next generation of wireless electronic devices based on thin layers of magnetic nanoparticles.