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• Main Authors: Chun-Ting Wang, 王君庭
• Other Authors: Dong-Hwang Chen
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/28894665005695628242

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 91 === This thesis includes two parts. First, the preparation of Au nanoparticles via the UV-radiation reduction of HAuCl4 in the aqueous solutions containing different types of surfactants was studied. The resultant Au nanoparticles were characterized by UV/VIS absorption spectrophotometer, XRD, and TEM. It was found that the type of surfactant played an important role in the formation of Au nanoparticles. If cationic surfactant CTAB was used, Au nanoparticles were not formed because of the stronger complexation of Au and CTAB ions. When anionic or nonionic surfactants were used, Au nanoparticles could be formed and their sizes varied with changing the surfactant concentration or the irradiation time and method. Secondly, the fabrication of continuous Ni nanoshells on polymer microspheres via the hydrazine reduction of nickel ions in ethylene glycol. It was found that homogeneous and continuous Ni nanoshells could be successfully coated on the surface of polymer microspheres under appropriate reaction temperature and the concentrations of nickel salt and hydrazine. The average thickness of Ni nanoshells was about 1.2 nm. After washing, the thickness of Ni nanoshells could be increased by multiple coating. When the thickness of Ni nanoshells increased up to about 20 nm, the conductivity of Ni-coated polymer microspheres was close to that of bulk Ni.