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Published on: January 18, 2022
Nanoscale elastic modulus of single horizontal ZnO nanorod using nanoindentation experiment
Muhammad Yousuf Soomro1, Ijaz Hussain, Nargis Bano
1Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, SE-60174, Sweden. narba@itn.liu.se.
Abstract:
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.
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