Morphological and Crystallographic Transformation of ZnO in Solution
Resource
J. Phys. Chem..
Journal
The Journal of Physical Chemistry C
Pages
1498-1506
Date Issued
2008-11
Date
2008-11
Author(s)
Gao, Yanfeng
Miao, H.-Y.
Lui, H.-J.
Nagai, Masayuki
Shyue, Jing-Jong
Abstract
This paper reports the investigation of the aging effects on the preparation of ZnO crystals and films. We have found that the morphology of ZnO films can be optimized by selecting appropriate chemical environments including the types of chemical species and their concentrations, which can regulate the dissolution−recrystallization process during soaking. Several unique morphologies of ZnO have been obtained from an aqueous solution containing ZnCl2 and a mixture complex agent (amine and ammonia). From this simple solution system, dense, transparent, thick ZnO films with thicknesses up to 20 μm can be grown at about 90 °C under atmospheric pressure. The components of the film were single-crystalline ZnO lamellas that were self-organized mainly with their c axis parallel to the substrate surface. The current findings reveal that one can purposely optimize morphology, crystallography, and organization to pursue special properties by kinetically controlling the nucleation and crystallization processes.
SDGs
Type
journal article