Soomro Muhammad Yousuf, Hussain Ijaz, Bano Nargis, Broitman Esteban, Nur Omer, Willander Magnus
Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, SE-60174, Sweden.
Nanoscale Res Lett. 2012 Feb 21;7(1):146. doi: 10.1186/1556-276X-7-146.
We measure the elastic modulus of a single horizontal ZnO nanorod [NR] grown by a low-temperature hydrothermal chemical process on silicon substrates by performing room-temperature, direct load-controlled nanoindentation measurements. The configuration of the experiment for the single ZnO NR was achieved using a focused ion beam/scanning electron microscope dual-beam instrument. The single ZnO NR was positioned horizontally over a hole on a silicon wafer using a nanomanipulator, and both ends were bonded with platinum, defining a three-point bending configuration. The elastic modulus of the ZnO NR, extracted from the unloading curve using the well-known Oliver-Pharr method, resulted in a value of approximately 800 GPa. Also, we discuss the NR creep mechanism observed under indentation. The mechanical behavior reported in this paper will be a useful reference for the design and applications of future nanodevices.
我们通过进行室温下直接负载控制的纳米压痕测量，来测量在硅衬底上通过低温水热化学工艺生长的单个水平氧化锌纳米棒[NR]的弹性模量。使用聚焦离子束/扫描电子显微镜双束仪器实现了对单个氧化锌纳米棒的实验配置。使用纳米操纵器将单个氧化锌纳米棒水平放置在硅晶片上的一个孔上方，并且两端用铂键合，形成三点弯曲配置。使用著名的奥利弗 - 法尔方法从卸载曲线中提取的氧化锌纳米棒的弹性模量约为800吉帕。此外，我们还讨论了在压痕下观察到的纳米棒蠕变机制。本文报道的力学行为将为未来纳米器件的设计和应用提供有用的参考。
