Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 13, Issue 2, Pages 904-908Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2013.5958
Keywords
Nanomaterial; Manganese Oxide; Electromagnetic Interference; Dielectric Loss; Magnetic Loss
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Funding
- National Science Foundation of China [61006001]
- Fundamental Research Funds for the Central Universities [Lzujbky-2010-84]
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Three dimensional (3D) hierarchical nanostructures are expected to provide enhanced microwave absorption properties for nanomaterials. In this report we prepared hollow urchinlike alpha-MnO2 nanostructures and dispersed alpha-MnO2 nanorods via a facile hydrothermal method. The complex permittivity and permeability of the hollow alpha-MnO2 nanourchins/paraffin wax composites with different manganese dioxide loadings were investigated in the range of 2-18 GHz, based on which the corresponding reflection loss were simulated. A minimum reflection loss of -36 dB was obtained from the composites with 50 wt% MnO2 nanostructures. Furthermore, the microwave absorption properties of dispersed alpha-MnO2 nanorods were studied for comparison, which indicate the unique morphol. ogy of the hollow urchinlike nanostructures is of significant effect to their microwave absorption properties.
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