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首页> 外文期刊>Physica, B. Condensed Matter >Dielectric behavior and transport properties of ZnO nanorods
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Dielectric behavior and transport properties of ZnO nanorods

机译：ZnO纳米棒的介电行为和传输性能

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摘要

Highly optical, good crystalline and randomly aligned ZnO nanorods were synthesized by the hydrothermal method. The dielectric properties of ZnO nanorods were attributed to the interfacial polarization at low frequencies (below 10 kHz) and orientational polarization at higher frequencies. The observed ω~((n-1)) dependence of dielectric loss was discussed on the basis of the Universal model of dielectric response. Dielectric loss peak was composed of the Debye like loss peak at higher frequencies and interfacial loss peak at lower frequencies. Charge transport through the grain and grain boundary region was investigated by impedance spectroscopy. At higher temperatures the conductivity of the nanorod was mainly through the grain interior and the overall impedance was contributed by the grain boundary region. The activation energy of nanorod was calculated as 0.078 eV, which is slightly higher than the reported bulk value.
机译：通过水热法合成了高度光学，良好晶体和随机排列的ZnO纳米棒。 ZnO纳米棒的介电性能归因于低频（低于10 kHz）的界面极化和高频的取向极化。在介电响应的通用模型的基础上，讨论了所观测到的介电损耗与ω〜（（n-1））的相关性。介电损耗峰由较高频率的德拜损耗峰和较低频率的界面损耗峰组成。通过阻抗谱研究了通过晶粒和晶界区域的电荷传输。在较高温度下，纳米棒的电导率主要通过晶粒内部，而总阻抗则由晶界区域贡献。纳米棒的活化能经计算为0.078 eV，略高于所报道的体积值。

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