• Gusatti, Marivone

Abstract

<jats:p>The solochemical method was applied to prepare ZnO nanocrystals at low temperature, using sodium hydroxide and zinc chloride as starting materials. In this work, different addition times of the precursor solution were adopted and their effects on the crystalline domains (or crystallite) size and particle morphology of the obtained samples were investigated. The synthesized products were characterized by X-ray powder diffraction (XRPD) and transmission electron microscopy (TEM) techniques. The XRPD results revealed that all samples produced have a single ZnO hexagonal wurtzite phase (space group<jats:italic>P6<jats:sub>3</jats:sub>mc</jats:italic>) under anisotropic strain. The parallel to perpendicular crystallite size ratio was about 1.21 for the sample produced with instantaneous addition of the precursor solution and 1.19 for 1 h longer addition time. The anisotropic strains become about 12% smaller for the sample produced with longer addition time. The TEM results of the samples showed ZnO nanometric particles with nearly rounded and rod-like morphologies.</jats:p>

Topics

• phase
• zinc
• anisotropic
• Sodium
• transmission electron microscopy
• space group