Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 324, Issue 20, Pages 3323-3327Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2012.05.042
Keywords
Hybrid nanosphere; Microwave absorption; Synergistic reaction; Nonlinear dielectric resonance
Funding
- National Natural Science Foundation of China [51173021]
- 863 National Major Program of High Technology of China [2012AA03A212]
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A novel kind of hybrid nanospheres made of Fe3O4 and ferrocenyl-CuPc (FCP) was prepared via effective solvothermal method and performed microwave absorptivity only in Ku-band with minimum reflection loss of -25 dB at 16.0 GHz corresponding to absorbing about 99.7% content of microwave. Scanning electron microscopy images indicated that the nanospheres with uniform particle size distribution have the average diameter of 135 nm. Due to the synergistic reaction between magnetic ferrocenyl-CuPc and Fe3O4, the hybrid nanospheres showed novel electromagnetic properties. The real part of complex permittivity of hybrid nanospheres remains stable in the range of 0.5-12.0 GHz and has a large fluctuation at 16.5 GHz. Moreover, the dielectric loss of hybrid nanospheres also appeared a sharp peak at 16.3 GHz with the value of 2.7. The specific gravity of hybrid nanospheres is about 2.08. On the basis of these results, the novel hybrids are believed to have potential applications in the microwave absorbing area in Ku-band. (C) 2012 Elsevier B.V. All rights reserved.
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