陳家俊陳貴賢林麗瓊莊創年2019-09-04不公開2019-09-042008http://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22GN0695420627%22.&%22.id.&http://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/100662當物體大小達奈米等級後其性質會有相當大的變化，使得其物理或 化學性質與巨觀時有些不同，奈米顆粒的大小與形狀對這些性質有很強 的影響，因此在近幾年來引起許多學者專家的注意。其中由於銅具有良 好的導電率(electrical conductive)、熱傳導(thermal conducting)和絕佳的 觸媒特性(catalytic)，價格又相對便宜，因此受到廣泛的研究。要合成出 穩定、分散性好，且具有單一形狀的銅奈米粒子是很困難的，主要是因 為銅非常容易氧化。 在本篇論文中我們利用有機化學還原法合成法，並藉由改變界面活 性劑合成出多面體(cuboctahedral)、方形與柱狀三種銅奈米粒子，而方 形與柱狀的產率為 85.54%、34.20%，多面體則是接近百分之百。藉由 SEM、TEM、XRD、XPS與UV-Vis分析儀器來鑑定其組成結構。從實驗 結果可以得知在控制形狀的反應機制中界面活性劑HDA可以選擇性的 還原出單一晶種，TOPO則是可以選擇性的吸附在晶種的(100)面上，藉 此合成出高產率的方形結構。最後由TPR的結果可以得知，我們所合成 的銅奈米粒子在活性上具有不錯的穩定性。The shapes and sizes of nanoscaled materials have attracted extensive attention in recent years, due to their strong effects on the physical and chemical properties of materials. Copper particles have been widely studied because of its high electrical conductivity, thermal conducting and excellent catalytic property. The synthesis of stable, monodisperse, well-defined copper nanoparticles is difficult, partially because of copper’s propensity for oxidation. This report describes the findings of an investigation of the synthesis of copper nanoparticles in organic chemical reduction and controlled shapes including 100% cuboctahedral, 34.20% rods and 85.54% cubes by manipulate surfactant. The different shapes of copper nanoparticles are characterized using SEM, TEM, XRD, XPS and UV-Vis. From the result, we demonstrated the synthesis mechanism combination of the selective formation of uniform seeds by HDA and a selective growth direction due to the preferential adsorption of TOPO on the certain nanocrystal 100 face is believed to lead formation of cube-shaped particles. The synthesis copper nanoparticles have high stable catalytic property from the TPR results.銅形貌程溫還原coppershapeTPR