Nano Energy
Nano Energy
4 years ago

Direct observation of spontaneous polarization induced electron charge transfer in stressed ZnO nanorods**© 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Global Science and Technology Forum Pte Ltd

Direct observation of spontaneous polarization induced electron charge transfer in stressed ZnO nanorods**© 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Global Science and Technology Forum Pte Ltd
We report here a theoretical and experimental study of the charge generated when a ZnO nanorod is subjected to external force and contacting on a timescale of order seconds. We show, for the samples considered, that the measured charge flow is over four orders of magnitude larger than expected based on the strain-induced piezoelectric response, and is comparable in magnitude to the spontaneous charge on the surface of an ideal nanorod. We present a defect-mediated electrostatic model to explain how the measured charge transfer can arise from the nanorod spontaneous polarization induced electron charge.

Publisher URL: www.sciencedirect.com/science

DOI: S221128551730705X

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