Nano Research

, Volume 5, Issue 1, pp 20–26

Sulfur-doped zinc oxide (ZnO) Nanostars: Synthesis and simulation of growth mechanism

Authors

  • Jinhyun Cho
    • Department of Electrical and Computer Engineering, Fitzpatrick Institute for PhotonicsDuke University
  • Qiubao Lin
    • Department of Chemistry, French Family Science CenterDuke University
    • School of ScienceJimei University
  • Sungwoo Yang
    • Department of Chemistry, French Family Science CenterDuke University
  • Jay G. SimmonsJr.
    • Department of Chemistry, French Family Science CenterDuke University
  • Yingwen Cheng
    • Department of Chemistry, French Family Science CenterDuke University
  • Erica Lin
    • Department of Chemistry, French Family Science CenterDuke University
  • Jianqiu Yang
    • Department of Chemistry, French Family Science CenterDuke University
  • John V. Foreman
    • U.S. Army Aviation and Missile Research, Development, and Engineering CenterWeapons Sciences Directorate
  • Henry O. Everitt
    • U.S. Army Aviation and Missile Research, Development, and Engineering CenterWeapons Sciences Directorate
    • Department of PhysicsDuke University
  • Weitao Yang
    • Department of Chemistry, French Family Science CenterDuke University
  • Jungsang Kim
    • Department of Electrical and Computer Engineering, Fitzpatrick Institute for PhotonicsDuke University
    • Department of Chemistry, French Family Science CenterDuke University
Research Article

DOI: 10.1007/s12274-011-0180-3

Cite this article as:
Cho, J., Lin, Q., Yang, S. et al. Nano Res. (2012) 5: 20. doi:10.1007/s12274-011-0180-3

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(NH2)2] were added into the growth solution, but no transformation occurred when urea (OC(NH2)2) 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. https://static-content.springer.com/image/art%3A10.1007%2Fs12274-011-0180-3/MediaObjects/12274_2011_180_Fig1_HTML.gif

Keywords

ZnO nanostar hexagram thiourea sulfur doping growth mechanism ab initio simulation

Supplementary material

12274_2011_180_MOESM1_ESM.pdf (226 kb)
Supplementary material, approximately 225 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012