The fabrication of nanowire by aqueous solution

• Main Authors: Mong-wei liu, 劉孟維
• Other Authors: Franklin C. Hong
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/87163507829282818224

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 95 === In this paper, we can mainly divide our experiments into three topics: zinc-oxide (ZnO) nanowire growth, ZnO/SiO2 core-shell structure synthesis, and fabrication of Si nanowire via etching methodology. Firstly, we focus on the fabrication of ZnO nanowire through hydrothermal method. We could optimize the growth condition by changing the precursor concentration, reaction temperature, and solvents. From the tunneling electron microscopy analysis (TEM), it indicates that the as-synthesis ZnO nanowire grow along the [0001] direction. And the photoluminescence (PL) spectra indicate a sharp and strong excitation peak locates at 387 nm wavelength. Thus, we could conclude that the prepared nanowires possess high single crystal qualities. Secondly, we subsequently fabricate ZnO/SiO core-shell structure with TEOS which serves as precursor. In this experiment, we utilize ammonium hydroxide to facilitate hydrolysis in iso-propanol solution. It is expectable that we could fill up the pin-hole, caused by the silicate distribution without uniformity, after several times coating treatment. We could prepare SiO nanotube through etching process with sulfuric acid, and corroborate our result with examining the residue of zinc oxide by EDS analysis. In the last section, we study on the fabrication of Si nanowire through wet etching. We deposit silver nanoparticles, which serve as catalyst and enhance high selectivity of etching in HF solution. Consequently, we could prepare 1-dimentional Si nanostructure with this easy and simple method.