Articles
  • The dependence of optical properties on the morphology and defects of nanocrystalline ZnO powders and their antibacterial activity
  • Sumetha Suwanboona,*, Pongsaton Amornpitoksukb, Phuwadol Bangrakc, Apinya Sukolratd and Nantakan Muensite
  • a Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand b Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand c School of Science, Walailak University, Nakhon Si Thammarat, Thailand, 80161, Thailand d Scientific Equipment Center, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand e Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand
Abstract
Nanocrystalline ZnO powders in a variety of shapes were synthesized through an easy precipitation method. Zinc salts, stabilizers and precipitating agents strongly affected the formation of the ZnO structure. The band gap value depended closely upon the amount of defects in various ZnO structures. The largest band gap value of 3.228 eV was obtained from ZnO nanorods with a crystallite size of 42 nm and a relative defect parameter of 0.099. The nanocrystalline ZnO particles can damage only S. aureus.

Keywords: Precipitation, Defects, Optical properties, ZnO, Antibacteria.

This Article

  • 2010; 11(5): 547-551

    Published on Oct 31, 2010

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