Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5352974 | Applied Surface Science | 2013 | 6 Pages |
Abstract
Polyhedral Fe nanoparticles with amorphous Al2O3/FeOx composites shells are prepared by the arc discharge method, in which the shape of Fe nanoparticles includes quadrilateral, pentagon, hexagonal and sphere. Magnetic and electromagnetic (EM) properties of Fe nanoparticles have been investigated in detail. Reflection loss (RL) values exceeding â10Â dB are calculated in 7-18Â GHz for an absorber thickness of 1.6Â mm, and RL values exceed â5Â dB at 2-18Â GHz for any absorber thickness between 3.8 and 10Â mm. An optimal RL value of â38.46Â dB is observed at 6.2Â GHz with a matching thickness of 2.3Â mm. The excellent EM properties are ascribed to the dielectric resonance from the special core-shell microstructure and the broad and strong natural resonance from the shape anisotropy of Fe nanoparticles.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Xianguo Liu, Yuping Sun, Chao Feng, Chuangui Jin, Weihuo Li,