| Summary: | 碩士 === 國立交通大學 === 材料科學與工程系所 === 97 === In this thesis, we successfully synthesized high-quality Se nanorods through a CMC-assisted chemical reduction approach. The growth mechanism for Se nanorods was systematically studied and discussed. We demonstrated that CMC molecules formed quasi-1-D channels that surrounded Se nanocrystals, enabling the occurrence of anisotropic growth of Se to form nanorods. Control over the resulting morphology of Se can be achieved through carefully modulating the relevant reaction conditions such as the pH value, reaction temperature and concentrations of CMC and reducing agents. Through the direct incorporation of Ag+ into Se, Ag2Se nanorods could be readily obtained. In addition, cation-exchange reaction was performed on the as-synthesized nanorods of Ag2Se, resulting in the formation of CdSe and ZnSe nanorods. The photoconductive properties of the as-synthesized Se nanorods were characterized, demonstrating their potential application in optoelectronic switching devices. Furthermore, the as-obtained Se nanorods showed considerably high photocatalytic activity for MB degradation under UV light illumination, implying that they could be a good photocatalyst toward many species.
|
|---|
