Showing papers by "Wei-Li Song published in 2008"
TL;DR: In this article, a large-scale β-MnO2 nanorods were synthesized by the hydrothermal method and the microwave attenuation was evidently enhanced with increasing temperature from 293 to 773 K. The increase in imaginary permittivity may result from the lower resistivity with rising temperature.
Abstract: Large-scale β-MnO2 nanorods were synthesized by the hydrothermal method. In X band, the microwave attenuation of the β-MnO2 nanorods is evidently enhanced with increasing temperature from 293 to 773 K. The enhanced temperature-response attenuation of β-MnO2 nanorods is mainly attributed to the decrease in the real permittivity and the increase in the imaginary permittivity at high temperature. The decrease in real permittivity would be mainly ascribed to the increase in the disorder degree of orientational alignment of the intrinsic polar moment in the β-MnO2 nanorods with temperature increasing. The increase in imaginary permittivity may result from the lower resistivity with rising temperature.
65 citations
TL;DR: In this article, a large amount of ZnO nano-whiskers with different morphologies like nanotetrapods, long-leg nano-tetrapod and multipods were prepared without any catalysts and additives in open air at high temperature.
Abstract: By a novel controlled combustion synthesis method, a large amount of ZnO nano-whiskers with different morphologies like nanotetrapods, long-leg nanotetrapod and multipods, were prepared without any catalysts and additives in open air at high temperature. Their morphologies, structures and optical properties were investigated by using SEM, XRD and PL spectrum. The possible growth mechanisms on the ZnO nano-whiskers were proposed in this paper.
17 citations