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- Title
Sulfur-doped zinc oxide (ZnO) Nanostars: Synthesis and simulation of growth mechanism.
- Authors
Cho, Jinhyun; Lin, Qiubao; Yang, Sungwoo; Simmons, Jay; Cheng, Yingwen; Lin, Erica; Yang, Jianqiu; Foreman, John; Everitt, Henry; Yang, Weitao; Kim, Jungsang; Liu, Jie
- Abstract
We present a bottom-up synthesis, spectroscopic characterization, and ab initio simulations of star-shaped hexagonal zinc oxide (ZnO) nanowires. The ZnO nanostructures were synthesized by a low-temperature hydrothermal growth method. The cross-section of the ZnO nanowires transformed from a hexagon to a hexagram when sulfur dopants from thiourea [SC(NH)] were added into the growth solution, but no transformation occurred when urea (OC(NH)) was added. Comparison of the X-ray photoemission and photoluminescence spectra of undoped and sulfur-doped ZnO confirmed that sulfur is responsible for the novel morphology. Large-scale theoretical calculations were conducted to understand the role of sulfur doping in the growth process. The ab initio simulations demonstrated that the addition of sulfur causes a local change in charge distribution that is stronger at the vertices than at the edges, leading to the observed transformation from hexagon to hexagram nanostructures. [InlineMediaObject not available: see fulltext.]
- Publication
Nano Research, 2012, Vol 5, Issue 1, p20
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-011-0180-3