Dynamic nanomechanics of zinc oxide nanowires
Dynamic nanomechanics of zinc oxide nanowires
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DOI：
10.1063/1.4704919
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发表时间：
2012-04
影响因子：
4
通讯作者：
Lifen Wang;Xuezeng Tian;Shi-ze Yang;Zhi Xu;Wenlong Wang;X. Bai
中科院分区：
文献类型：
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作者：
Lifen Wang;Xuezeng Tian;Shi-ze Yang;Zhi Xu;Wenlong Wang;X. Bai
利用透射电子显微镜中的交流信号，在氧化锌纳米线上产生了机电共振，并测量了氧化锌纳米线的机械品质因数Q和弹性弯曲模量E.谐振幅度由所施加的交流电压调谐。结果表明，随着共振振幅的增加，Q下降了约80%，而E略有下降（约3%）。讨论了力学性能随振幅变化的机理。研究ZnO纳米线的动态纳米力学特性对ZnO纳米线的纳米应用具有重要意义。
The electromechanical resonances of individual zinc oxide nanowires were induced by alternative current (ac) signals inside a transmission electron micrcrope, which have been used to measure the mechanical quality factors (Q) and elastic bending moduli (E) of a single zinc oxide (ZnO) nanowire. The resonance amplitudes were tuned by the applied ac voltages. The results indicate that Q drops as much as ∼80% with increasing resonance amplitudes, while E slightly decreases (∼3%). The mechanism of the amplitude-dependent mechanical properties is discussed. This study on dynamic nanomechanics of ZnO nanowires is significant for their cantilever-based applications.