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Local piezoelectric effect on single crystal ZnO microbelt transverse I-V characteristics

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6 Author(s)
Li, M. ; Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, People’s Republic of China ; Su, Y. J. ; Chu, W. Y. ; Qiao, L. J.
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One-dimensional ZnO microbelts were prepared by chemical vapor deposition on Si substrates with sputtered Pt film. Using Pt-coated atomic force microscope (AFM) tip, the belts’ transverse I-V characteristics were measured under varying applied elastic loads. ZnO microbelt conductivity reduced with load, but gradually increased upon unloading. Transverse electrical conductivity decrease at higher loads is attributed to the depletion zone formation induced by local piezoelectric effect in ZnO single crystal belt with (0001) top surface indented by the AFM tip. The observed effect can be utilized in a nanoforce sensor device.

Published in:

Applied Physics Letters  (Volume:98 ,  Issue: 8 )

Date of Publication:

Feb 2011

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