Modifying optical properties of ZnO nanowires via strain-gradient

Fu, Xue-Wen, Fu, Qiang, Kou, Liangzhi, Zhu, Xin-Li, Zhu, Rui, Xu, Jun, Liao, Zhi-Min, Zhao, Qing, Guo, Wan-Lin, & Yu, Dapeng (2013) Modifying optical properties of ZnO nanowires via strain-gradient. Frontiers of Physics, 8(5), pp. 509-515.

View at publisher


We conduct systematical cathodoluminescence study on red-shift of near-band-edge emission energy in elastic bent ZnO nanowires with diameters within the exciton diffusion length (~ 200 nm) in liquid nitrogen temperature (81 K). By charactering the emission spectra of the nanowires with different local curvatures, we find a linear relationship between strain-gradient and the red-shift of near-band-edge emission photon energy, an elastic strain-gradient effect in semiconductor similar to the famous flexoelectric effect in liquid crystals. Our results provide a new route to understand the inhomogeneous strain effect on the energy bands and optical properties of semiconductors and should be useful for designing advanced nano-optoelectronic devices.

Impact and interest:

4 citations in Scopus
Search Google Scholar™
2 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 98220
Item Type: Journal Article
Refereed: Yes
Keywords: cathodoluminescene, energy bands, exciton energy, strain-gradient, ZnO nanowire
DOI: 10.1007/s11467-013-0386-9
ISSN: 2095-0470
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 31 Aug 2016 03:15
Last Modified: 01 Sep 2016 23:43

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page