Structure and Electromagnetic Properties of Single-Crystalline Fe3O4 Hollow Nanospheres

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	Structure and Electromagnetic Properties of Single-Crystalline Fe3O4 Hollow Nanospheres
	Y. J. Zhang; S. W. Or; Z. D. Zhang
	2014
发表期刊	Journal of Nanoscience and Nanotechnology
ISSN	1533-4880
卷号	14 期号:6 页码:4664-4669
摘要	Magnetite (Fe3O4) hollow nanospheres with an average diameter of 300 nm and an average shell thickness of 40 nm were synthesized by a surfactant-free solvothermal reduction method, and their structure and electromagnetic (EM) properties were investigated. The Fe3O4 hollow nanospheres showed single-crystalline features along the [111] crystal growth direction and a ferrimagnetic behavior at room temperature. The Fe3O4 hollow nanosphere/paraffin composites exhibited a flatter response in the real complex relative permittivity (epsilon') and a lower value of similar to 0.5 in the imaginary complex relative permittivity (epsilon '') in comparison with other Fe3O4-based nanomaterials because of the enhanced electrical resistivity. Their imaginary complex relative permeability (mu '') displayed a resonance peak at similar to 4 GHz and a negative value up to -0.03 in the 17.2-18 GHz range due to the dissipation of EM energy in the cavity of the hollow nanospheres. Their reflection loss (RL) exceeded -10 dB from 3.1 to 10.1 GHz at a thickness of 2.6-5 mm and attended an optimal value of -43.5 dB at 4 GHz at 5 mm thickness as a result of an effective complementation between the dielectric and magnetic losses.
部门归属	[zhang, yajing ; zhang, zhidong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [zhang, yajing] shenyang univ chem technol, coll chem engn, shenyang 110142, peoples r china. [zhang, yajing ; or, siu wing] hong kong polytech univ, dept elect engn, kowloon, hong kong, peoples r china. ; or, sw (reprint author), hong kong polytech univ, dept elect engn, kowloon, hong kong, peoples r china.
关键词	Dielectric And Magnetic Losses Electromagnetic Wave Absorption Fe3o4 Hollow Nanospheres Reflection Loss Solvothermal Reduction Method Microwave-absorption Properties Core/shell Nanorods Synthesis Magnetic-properties Nanoparticles Microspheres Nanocapsules Monodisperse Particles Nanotubes Growth
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72604
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. J. Zhang,S. W. Or,Z. D. Zhang. Structure and Electromagnetic Properties of Single-Crystalline Fe3O4 Hollow Nanospheres[J]. Journal of Nanoscience and Nanotechnology,2014,14(6):4664-4669.
APA	Y. J. Zhang,S. W. Or,&Z. D. Zhang.(2014).Structure and Electromagnetic Properties of Single-Crystalline Fe3O4 Hollow Nanospheres.Journal of Nanoscience and Nanotechnology,14(6),4664-4669.
MLA	Y. J. Zhang,et al."Structure and Electromagnetic Properties of Single-Crystalline Fe3O4 Hollow Nanospheres".Journal of Nanoscience and Nanotechnology 14.6(2014):4664-4669.