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Title of Journal: Int J Miner Metall Mater

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Abbravation: International Journal of Minerals, Metallurgy, and Materials

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University of Science and Technology Beijing

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1869-103X

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Characterization of structural and electrical prop

Authors: Yudong Gu Wenjie Mai Peng Jiang
Publish Date: 2011/12/04
Volume: 18, Issue: 6, Pages: 686-690
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Abstract

ZnO tetrapods were synthesized by a typical thermal vaporsolid deposition method in a horizontal tube furnace Structural characterization was carried out by transmission electron microscopy TEM and selectarea electron diffraction SAED which shows the presence of zinc blende nucleus in the center of tetrapods while the four branches taking hexagonal wurtzite structure The electrical transport property of ZnO tetrapods was investigated through an insitu nanoprobe system The three branches of a tetrapod serve as source drain and “gate” respectively while the fourth branch pointing upward works as the force trigger by vertically applying external force downward The conductivity of each branch of ZnOtetrapods increases 3–4 times under pressure In such situation the electrical current through the branches of ZnO tetrapods can be tuned by external force and therefore a simple force sensor based on ZnO tetrapods has been demonstrated for the first timeThis work was financially supported by the China Scholarship Council CSC No20083019 Fundamental Research Funds for the Central Universities Nos21611603 21611424 and 216113143 Jinan University Startup Funds No50624019 and the Knowledge Innovation Program of the Chinese Academy of Sciences NoKJCX2YWM13

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