本論文分為兩部份，首先利用樹狀高分子（dendrimer）作為模板（template），以聯胺為還原劑，還原氯化鎳前驅鹽以合成樹狀高分子包覆鎳奈米粒子，並利用TEM、EDX、以及TGA等儀器對粒子之結構、組成及特性分析作探討。其次，在ITO導電基板上以矽烷改質，利用逐層自組裝（layer-by-layer self-assembly）技術，製成多種金屬及其合金粒子的單層或多層複合膜，以UV/Vis 來探討其光學性質的變化，並以原子力顯微鏡（Atomic Force Microscopy，AFM）來觀察其表面結構。
關於樹狀高分子包覆鎳奈米粒子部份，由TEM分析顯示，主要有兩種不同的包覆機制，一者為由數個樹狀高分子包覆而形成的鎳奈米粒子，粒徑約為10nm左右；再者為於樹狀高分子內部生成尺寸小且均一的奈米粒子，粒徑約為4-5nm左右，與我們所使用的樹狀高分子（PAMAM-OH Dendrimer，Generation 4）之理論大小（4.5nm）相近，並發現有二維自組裝的行為。藉由磁鐵可以簡單地將其分離，前者的磁性較強，短時間內即可由磁鐵所吸附，後者則磁性較弱，懸浮於溶液當中。由TGA分析的結果顯示，亦可明顯看出兩者包覆機制之不同。
關於逐層自組裝奈米複合膜部份，利用APTMS矽烷將ITO導電基板改質之後，將不同的金屬粒子（Au, Pt, Pd）以及合金粒子(Au/Ag, Au/Pd, Au/Pt, Pd/Pt)自組裝於其上。並使用雙硫醇（Dithiol）作為分子轉接層，來控制自組裝的層數，並由UV/Vis吸收光譜與AFM觀察得知，本研究可以成功的製備出不同金屬及合金奈米粒子之多層或單層膜。且在自組裝過程中發現，不同系統下，金屬粒子吸附的時間，會影響其性質的變化。

The thesis involves two parts:（1）Synthesis of dendrimer-encapsulated nickel nanoparticles using hydrazine as a reducing agent. Their structure, composition, and property were investigated by TEM, EDX, and TGA. （2）Formation of monolayers or multilayers of different metal and alloy nanoparticles on silanized ITO glasses by layer-by-layer self-assembled technique. The optical property and surface morphology of the nanocomposite films were characterized by UV/VIS absorption spectra and AFM.
Two types of dendrimer-encapsulated nickel nanoparticles were observed. For the first one, nickel nanoparticles were surrounded by several dendrimers. Their average diameter was about 10nm. For the second one, nickel nanoparticles were produced in the interiors of dendrimers. Their average diameter was 4-5nm. They were monodisperse and more uniform in size. Also, a 2-D self-assembly behavior was observed. Both composites could be separated easily via an external magnetic field, and the former had a higher magnetization. Besides, TGA analysis revealed two composites had different thermal decomposition behavior.
The monolayers or multilayers of different metals (Au, Pt, Pd) and alloys (Au/Ag, Au/Pd, Au/Pt, Pd/Pt) were fabricated on APTMS-modified ITO glass by layer-by-layer self-assemble technique. Dithiol was used as an interlayer. From UV/VIS absorption spectra and AFM analysis, the formation of nanocomposite films was confirmed. It was also found that the immersion time of metal nanoparticles might affect the properties of nanocomposite films.

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