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Direct observation of spontaneous polarization induced electron charge transfer in stressed ZnO nanorods

Published on 1 October 2018
Direct observation of spontaneous polarization induced electron charge transfer in stressed ZnO nanorods
Description
 
Date 
Authors
Seifikar M., Christian B.P., Volk J., Radó J., Lukács I.E., Dauksevicius R., Gaidys R., Lebedev V., Viana A., O'Reilly E.P.
Year2018-0005
Source-TitleNano Energy
Affiliations
Tyndall National Institute, Dyke Parade, Prospect Row, Cork, Ireland, Department of Physics, University College Cork, Cork, Ireland, Fraunhofer Institute for Applied Solid State Physics IAF, Tullastr. 72, Freiburg, Germany, Institute for Technical Physics and Materials Science (MFA) MTA EK, Konkoly-Thege M. út 29-33, Budapest, Hungary, Óbuda University Doctoral School on Material Sciences and Technologies, Bécsi út 96/b, Budapest, Hungary, Institute of Mechatronics, Kaunas University of Technology, Studentu st. 56, Kaunas, Lithuania, CEA, LETI, MINATEC Campus, Grenoble, France
Abstract
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. © 2017 Elsevier Ltd
Author-Keywords
Nanorod, Nanowire, Piezoelectricity, Pressure sensor, Spontaneous polarization, ZnO
Index-Keywords
Charge transfer, Crystallography, Nanorods, Nanowires, Piezoelectricity, Polarization, Pressure sensors, Zinc oxide, Direct observations, Electron charge, Electron charge transfer, Electrostatic modeling, External force, Orders of magnitude, Piezoelectric response, Spontaneous polarizations, Zinc compounds
ISSN22112855
LinkLink

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