Articles
  • Enhancement of optical bandgap and luminescent characteristics of one-dimensional ZnO nanoparticles 
  • Sumetha Suwanboona,*, Pongston Amornpitoksukb and Supasarote Muensitc
  • a Materials Science Program, 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 Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand
Abstract
One-dimensional ZnO nanoparticles were successfully synthesized from Zn(CH(3)COO)(2)center dot 2H(2)O as well as CTAB-assisted NaOH and CTAB-assisted HMTA solutions. The entire calcined ZnO nanoparticles indexed with the hexagonal or wurtzite structure. Branch rod-like and columnar hexagonal-like ZnO structures were shaped when aqueous NaOH and HMTA solutions were used as the precipitating agent, respectively. In this study, the crystallite size decreased as the CTAB concentration was increased. By using an aqueous NaOH solution as the precipitating agent, the E(g) value varied in a range of 3.222-3.235 eV. While the E(g) value varied in a range of 3.206-3.216 eV when an aqueous HMTA solution was used. The emission peaks fitted with a Gaussian function at 390, 510, 620 and 730 nm and the defects in ZnO crystal were decreased by modifying the precursor solution with CTAB.

Keywords: Nanostructured materials; Zinc oxide; Precipitation; Optical properties; X-ray diffraction

This Article

  • 2010; 11(4): 419-424

    Published on Aug 31, 2010