Growth of Ga-doped ZnS nanowires constructed by self-assembled hexagonal platelets with excellent photocatalytic properties

Yen Chih Chen, Chao Hung Wang, Hsin Ying Lin, Bi Hua Li, Wei Ting Chen, Chuan-Pu Liu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A new process for making single crystalline undoped and Ga-doped ZnS nanowires with simple evaporation and condensation procedures on Si and GaN is introduced. The process does not need additional catalysts or precursors. The growth mechanism is studied using transmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. TEM images show that the undoped ZnS nanowires exhibit an ordinary straight morphology, whereas the Ga-doped nanowires are composed of aligned hexagonal platelets, connected in the center into nanowires to maximize surface area. The Ga 2p3 and S 2p peaks in the XPS results confirm the presence of Ga doping in the form of Ga-S bonding. Raman spectra show that the ZnS LO peak is red-shifted from 349 to 347 cm -1 , indicative of a tensile stress caused by the Ga dopants. The growth mechanism and photocatalytic activity of the Ga-doped ZnS nanowires are discussed. We also demonstrate the excellent photocatalytic activity of Ga-doped ZnS nanowires as compared to those of undoped ZnS nanowires and Ga-doped ZnS nanosheets.

Original languageEnglish
Article number455604
JournalNanotechnology
Volume21
Issue number45
DOIs
Publication statusPublished - 2010 Nov 12

Fingerprint

Platelets
Nanowires
Photoelectron spectroscopy
Doping (additives)
Transmission electron microscopy
X rays
Nanosheets
Tensile stress
Raman spectroscopy
Raman scattering
Condensation
Evaporation
Crystalline materials
Catalysts

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Chen, Yen Chih ; Wang, Chao Hung ; Lin, Hsin Ying ; Li, Bi Hua ; Chen, Wei Ting ; Liu, Chuan-Pu. / Growth of Ga-doped ZnS nanowires constructed by self-assembled hexagonal platelets with excellent photocatalytic properties. In: Nanotechnology. 2010 ; Vol. 21, No. 45.
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Growth of Ga-doped ZnS nanowires constructed by self-assembled hexagonal platelets with excellent photocatalytic properties. / Chen, Yen Chih; Wang, Chao Hung; Lin, Hsin Ying; Li, Bi Hua; Chen, Wei Ting; Liu, Chuan-Pu.

In: Nanotechnology, Vol. 21, No. 45, 455604, 12.11.2010.

Research output: Contribution to journalArticle

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