Reaction between sodium hydroxide and zinc acetate leads to the formation of zinc hydroxide, Zn(OH)2. The as-prepared Zn(OH)2 was then decomposed by using conventional heating process or with the aid of microwave irradiation. The nanoproducts of both methods were ZnO nanostructures of different size and shape, but the microwave irradiation method shows many advantages in yield and reaction time. Some surfactants such as SDS, CTAB, or PVP were then used to cap the product for studying the influence on the morphology and properties of the nanostructures.
Indium-doped ZnO nanometre thick disks were successfully fabricated by thermal evaporation of a powder mixture of ZnO, In 2 O 3 , and graphite without catalyst. Incorporation of indium metal in the nanodisks during the synthesis was not successful due to the formation of In 2 O 3 phase. SEM images show that some ZnO disks have perfect hexagonal shape. These disks are about 1-5 mm in size and 40-100 nm in thickness. X-ray diffraction, Raman, transmission electron microscopy, and energy dispersive spectroscopy observations show that the disks are single crystalline ZnO with wurtzite structure. Effect of indium doping on the structure, morphology, optical absorption, and photoluminescence of the nanodisks are studied.
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