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Crystalline zinc oxide powders with various morphologies have been prepared by hydrothermal treatment of zinc acetate in pure water, different concentrate KOH aqueous solutions. The morphology and structure of the products were characterized by scanning electron microscopy, X-ray diffraction and Raman spectra. It was found that the concentrate of KOH play an important role in controlling the morphologies...
ZnO single-crystal hexagonal microtubes were controllably fabricated by hydrothermal process. The ZnO microtubes were characterized by scanning electron microscopy, x-ray diffraction and high-resolution transmission electron microscopy. The results show that the as-prepared ZnO microtubes are hexagonal and single crystal in nature and grow on Si (111) substrates along the [0002] direction. SEM images...
In this study, the effects of precursor concentration on the zinc oxide (ZnO) nanorods grown on flexible polyethylen terephthalate (PET) substrate with and without buffer layer were discussed. The concentration was varied from 0.05 to 0.5M. When we inserted buffer layer before hydrothermally growth of ZnO, better aligned ZnO nanorods were grown. At relatively middle concentration (from 0.2 to 0.3M),...
One-dimensional ZnO rods about 40 mum long are prepared by low temperature disodium ethylene diamine tetraacetate (EDTA)-assisted hydrothermal method. The prepared ZnO crystals are characterized by X-ray power diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It is found that EDTA plays an important role to crystal habit of ZnO crystal and ZnO rods...
In this paper, we present our recent study on the fabrication and characterization of ammonia gas sensors based on quartz thickness shear mode (TSM) resonators employing ZnO nanowires as the sensitive coating layer. c-axis vertically aligned ZnO nanowire arrays were synthesized on the quartz resonator through a simple hydrothermal synthesis route. The ZnO nanowires were characterized by X-ray diffraction...
In this paper, we present our recent study on the fabrication and characterization of the ZnO nanowires gas sensor using thickness shear mode (TSM) langasite resonators. C-axis vertically aligned ZnO nanowire arrays were synthesized on the langasite resonator by using an utrathin ZnO seed layer through a simple hydrothermal route. The nanowires were characterized by X-ray diffraction (XRD) and scanning...
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