Optical Investigation of ZnO Nanowires

In Situ Investigation of the Carbothermal Reduction of ZnO Nanowires

Carbothermal reduction is among the oldest chemical processes, commonly used in the production of metals from the corresponding metal oxides or ores (e.g., iron from iron oxides). By using carbon as a reducing agent, decomposition of metal oxides at temperatures much lower than their typical decomposition temperatures can occur. However, a detailed fundamental understanding of such a reaction p...

Experimental-computational investigation of ZnO nanowires strength and fracture.

An experimental and computational approach is pursued to investigate the fracture mechanism of [0001] oriented zinc oxide nanowires under uniaxial tensile loading. A MEMS-based nanoscale material testing stage is used in situ a transmission electron microscope to perform tensile tests. Experiments revealed brittle fracture along (0001) cleavage plane at strains as high as 5%. The measured fract...

Structural and Optical Properties of ZnO Nanowires Doped with Magnesium

ZnO nanowires doped with Mg have been successfully prepared on Au-coated Si (111) substrates using chemical vapor deposition method with a mixture of ZnO, Mg, and activated carbon powders as reactants at 850 ◦C. The structural, compositional, morphological and optical properties of the samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscop...

Optical Properties of ZnO Nanowires and Nanorods Synthesized by Two Step Oxidation Process

ZnO nanowires with a diameter of 70 nm and nanorods with a diameter in the range of 100-150 nm and two micrometer in length were grown on glass substrates by resistive evaporation method and applying a two step oxidation process at low temperatures, without using any catalyst, template or buffer layer. XRD pattern of these nanostructures indicated a good crystallinity property with wurtzite hex...

Controlled Growth of ZnO Nanowires and Their Optical Properties