1. Preserving the Q-factors of ZnO nanoresonators via polar surface reconstruction
- Author
-
Jin-Wu Jiang, Timon Rabczuk, and Harold S. Park
- Subjects
Condensed Matter - Materials Science ,Materials science ,Oscillation ,Mechanical Engineering ,Nanowire ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,Bioengineering ,General Chemistry ,Molecular physics ,Molecular dynamics ,Condensed Matter::Materials Science ,Quality (physics) ,Mechanics of Materials ,Normal mode ,Polar ,General Materials Science ,Electrical and Electronic Engineering ,Surface reconstruction ,Order of magnitude - Abstract
We perform molecular dynamics simulations to investigate the effect of polar surfaces on the quality (Q)-factors of zinc oxide (ZnO) nanowire-based nanoresonators. We find that the Q-factors in ZnO nanoresonators with free polar (0001) surfaces is about one order of magnitude higher than in nanoresonators that have been stabilized with reduced charges on the polar (0001) surfaces. From normal mode analysis, we show that the higher Q-factor is due to a shell-like reconstruction that occurs for the free polar surfaces. This shell-like reconstruction suppresses twisting motion in the nanowires such that the mixing of other modes with the resonant mode of oscillation is minimized, and leads to substantially higher Q-factors in the ZnO nanoresonators with free polar surfaces., Nanotechnology, published. arXiv admin note: substantial text overlap with arXiv:1307.3072
- Published
- 2013