| 초록 |
Zinc oxide (ZnO) nanostructures have drawn considerable attentions because of their excellent material properties, which lead to the generation of various electronic devices. ZnO nanorods were hydrothermally evolved by using equimolar zinc nitrate hydrate (Zn(NO3)2·6H2O) and hexamethylenetetramine (C6H12N4) solutions. The shape and size of the nanostructures, obtained by aqueous method, were greatly influenced by the growth temperature and the molar concentrations. Nanorods, grown at higher temperature (90 °C), have pointed tips, where as nanostructures of hexagonal flat-end were obtained at 75 °C. Hardly any nanostructures were observed by further reducing the temperature to 60 °C. In addition, solutions with higher molarity favored the appearance of nanoflowers. Similar structures were obtained on various substrates such as glass, ITO/glass and silicon. Furthermore, ZnO nanowires of 50-70 nm in diameter were obtained by using sputtered ZnO film as a seed layer. |
