Bandgap engineering and manipulating electronic and optical properties of ZnO nanowires by uniaxial strain

Shao, Rui-wen, Zheng, Kun, Wei, Bin, Zhang, Yue-fei, Li, Yu-jie, Han, Xiao-dong, Zhang, Ze and Zou, Jin (2014) Bandgap engineering and manipulating electronic and optical properties of ZnO nanowires by uniaxial strain. Nanoscale, 6 9: 4936-4941. doi:10.1039/c4nr00059e


Author Shao, Rui-wen
Zheng, Kun
Wei, Bin
Zhang, Yue-fei
Li, Yu-jie
Han, Xiao-dong
Zhang, Ze
Zou, Jin
Title Bandgap engineering and manipulating electronic and optical properties of ZnO nanowires by uniaxial strain
Journal name Nanoscale   Check publisher's open access policy
ISSN 2040-3364
2040-3372
Publication date 2014-05-07
Year available 2014
Sub-type Article (original research)
DOI 10.1039/c4nr00059e
Open Access Status Not Open Access
Volume 6
Issue 9
Start page 4936
End page 4941
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract Bandgap engineering is a common practice for tuning semiconductors for desired physical properties. Although possible strain effects in semiconductors have been investigated for over a half-century, a profound understanding of their influence on energy bands, especially for large elastic strain remains unclear. In this study, a systematic investigation of the transport properties of n-type [0001] ZnO nanowires was performed at room temperature using the in situ scanning tunnelling microscope-transmission electron microscope technique which shows that the transport properties vary with the applied external uniaxial strain. It has been found that the resistance of ZnO nanowires decreases continuously with increasing compressive strain, but increases under increased tensile strain, suggesting piezo-resistive characteristics. A series of near-band-edge emissions were measured and the corresponding variations of bandgaps were obtained during the application of tensile strain of individual ZnO nanowires via cathodoluminescence spectroscopy. From this, a relationship between the changes of energy bandgap and the transport properties, both induced by uniaxial strain, is built.
Keyword Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
CHEMISTRY, MULTIDISCIPLINARY
MATERIALS SCIENCE, MULTIDISCIPLINARY
NANOSCIENCE & NANOTECHNOLOGY
PHYSICS, APPLIED
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 11004004
1112004
201214
Z121103002512017
Institutional Status UQ

 
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