Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2803764
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In this paper, cagelike ZnO/SiO2 nanocomposites were prepared and their microwave absorption properties were investigated in detail. Dielectric constants and losses of the pure cagelike ZnO nanostructures were measured in a frequency range of 8.2-12.4 GHz. The measured results indicate that the cagelike ZnO nanostructures are low-loss material for microwave absorption in X band. However, the cagelike ZnO/SiO2 nanocomposites exhibit a relatively strong attenuation to microwave in X band. Such strong absorption is related to the unique geometrical morphology of the cagelike ZnO nanostructures in the composites. The microcurrent network can be produced in the cagelike ZnO nanostructures, which contributes to the conductive loss. (c) 2007 American Institute of Physics.
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