Direct observation of spontaneous polarization induced electron charge transfer in stressed ZnO nanorods
| Auteurs | Seifikar M., Christian B.P., Volk J., Radó J., Lukács I.E., Dauksevicius R., Gaidys R., Lebedev V., Viana A., O'Reilly E.P. |
| Year | 2018-0005 |
| Source-Title | Nano 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 |
| ISSN | 22112855 |
| Lien vers article | Link |