Finite element method calculations of ZnO nanowires for nanogenerators

The bending of a nonconducting piezoelectric ZnO nanowire is simulated by finite element method calculations. The top part is bent by a lateral force, which could be applied by an atomic force microscope tip. The generated electrical potential is ± 0.3 V . This relatively high signal is, however, di...

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Bibliographic Details
Published in:Applied physics letters 2008-03, Vol.92 (12), p.122904-122904-3
Main Authors: Schubert, M. A., Senz, S., Alexe, M., Hesse, D., Gösele, U.
Format: Article
Language:English
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Summary:The bending of a nonconducting piezoelectric ZnO nanowire is simulated by finite element method calculations. The top part is bent by a lateral force, which could be applied by an atomic force microscope tip. The generated electrical potential is ± 0.3 V . This relatively high signal is, however, difficult to measure due to the low capacitance of the ZnO nanowire ( ∼ 4 × 10 − 5 pF ) as compared to the capacitance of most preamplifiers ( ∼ 5 pF ) . A further problem arises from the semiconducting properties of experimentally fabricated ZnO nanowires which causes the disappearance of the voltage signal within picoseconds.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2903114