Zhang Chi, Wang Yao, Chen Yun, Wang Yatao, Wang Peng, Wu Qiong
Faculty of Materials and Manufacturing, Beijing University of Technology, Key Lab of Advanced Functional Materials, Ministry of Education, Beijing 100124, China.
Industry Development and Promotion Center, Ministry of Industry and Information Technology of China, Beijing 100846, China.
Nanomaterials (Basel). 2022 Aug 12;12(16):2764. doi: 10.3390/nano12162764.
The magnetic interactions between neighboring magnetic nanoparticles make the synthesis of nanocomposites made of two kinds of magnetic nanoparticles extremely difficult. In this paper, to achieve an effective nanocomposite of Co and FeO nanoparticles, a special urchin-like Co nanomatrix was used to prepare the Co/FeO nanocomposites. The FeO nanoparticles are evenly embedded into the branches of the C clusters, bringing the two types of particles into close contact and ensuring the optimal magnetic and microwave properties. The electromagnetic (EM) parameters at 1-18 GHz and the magnetic loss tangents can be effectively modulated, and the absorption frequency bands of the EM waves are shifted to the X-Ku bands (8-18 GHz) from the S-C bands (2-8 GHz) after the FeO nanoparticles are compounded.
相邻磁性纳米粒子之间的磁相互作用使得由两种磁性纳米粒子制成的纳米复合材料的合成极其困难。在本文中，为了制备一种有效的钴和氧化亚铁纳米粒子的纳米复合材料，采用了一种特殊的海胆状钴纳米基体来制备钴/氧化亚铁纳米复合材料。氧化亚铁纳米粒子均匀地嵌入到钴纳米簇的分支中，使两种类型的粒子紧密接触，并确保了最佳的磁性能和微波性能。在1-18GHz范围内的电磁参数和磁损耗正切可以得到有效调制，并且在复合氧化亚铁纳米粒子后，电磁波的吸收频段从S-C波段（2-8GHz）移至X-Ku波段（8-18GHz）。
