Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75028
Title: Piezoelectric potential in single-crystalline ZnO nanohelices based on finite element analysis
Authors: Hao, H
Jenkins, K
Huang, X 
Xu, Y
Huang, J
Yang, R
Issue Date: 2017
Source: Nanomaterials, Dec. 2017, v. 7, no. 12, 430
Abstract: Electric potential produced in deformed piezoelectric nanostructures is of significance for both fundamental study and practical applications. To reveal the piezoelectric property of ZnO nanohelices, the piezoelectric potential in single-crystal nanohelices was simulated by finite element method calculations. For a nanohelix with a length of 1200 nm, a mean coil radius of 150 nm, five active coils, and a hexagonal coiled wire with a side length 100 nm, a compressing force of 100 nN results in a potential of 1.85 V. This potential is significantly higher than the potential produced in a straight nanowire with the same length and applied force. Maintaining the length and increasing the number of coils or mean coil radius leads to higher piezoelectric potential in the nanohelix. Appling a force along the axial direction produces higher piezoelectric potential than in other directions. Adding lateral forces to an existing axial force can change the piezoelectric potential distribution in the nanohelix, while the maximum piezoelectric potential remains largely unchanged in some cases. This research demonstrates the promising potential of ZnO nanohelices for applications in sensors, micro-electromechanical systems (MEMS) devices, nanorobotics, and energy sciences.
Keywords: FEM
Nanohelix
Numerical simulation
Piezotronic
Publisher: MDPI AG
Journal: Nanomaterials 
ISSN: 2079-4991
DOI: 10.3390/nano7120430
Rights: © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The following publication Hao, H.; Jenkins, K.; Huang, X.; Xu, Y.; Huang, J.; Yang, R. Piezoelectric Potential in Single-Crystalline ZnO Nanohelices Based on Finite Element Analysis. Nanomaterials 2017, 7, 430, 1-9 is available at https://dx.doi.org/10.3390/nano7120430
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