Journal article 936 views 210 downloads
Mechanisms underlying the shape effect on nano-piezoelectricity
R.J. Wang,
C.Y. Wang,
Y.T. Feng,
C. Tang,
Yuntian Feng 
,
Chengyuan Wang
,
Chengyuan Wang
Nano Energy, Volume: 53, Pages: 906 - 915
Swansea University Authors:
Yuntian Feng , Chengyuan Wang
-
PDF | Accepted Manuscript
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DOI (Published version): 10.1016/j.nanoen.2018.09.031
Abstract
Piezoelectric nanowires (NWs) or nanotubes (NTs) are a vital component in nano-electromechanical and piezo-electronic device development. With various cross-sectional geometries achievable, the piezoelectric property-cross sectional shape relation is of fundamental interest. As existing studies (pri...
| Published in: | Nano Energy |
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| ISSN: | 22112855 |
| Published: |
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa44424 |
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| Abstract: |
Piezoelectric nanowires (NWs) or nanotubes (NTs) are a vital component in nano-electromechanical and piezo-electronic device development. With various cross-sectional geometries achievable, the piezoelectric property-cross sectional shape relation is of fundamental interest. As existing studies (primarily based on first-principles calculations) are limited to ultrathin NWs or analysis based on continuum theories, the present work employs molecular statics (MS) simulation, which enables the examination of NWs/NTs up to cross-sectional size of 20.6nm and elucidation of the underlying mechanisms at the atomic level. Analyses are carried out for NWs/NTs with experimentally observed geometry by comparing their size-dependence of effective piezoelectric constant and the radial distribution of the average dipole moment change with strain. The fraction of strain-sensitive dipoles, initial volume contraction and surface piezoelectricity were shown to control the shape effect on the piezoelectricity of ZnO nanostructures. |
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| Keywords: |
Zinc oxide Nanowires, shape effect, piezoelectric constants, volume contraction |
| College: |
Faculty of Science and Engineering |
| Start Page: |
906 |
| End Page: |
915 |