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研究生: 莊又澄
Yo-Cheng Chuang
論文名稱: 以電化學方法誘發貴金屬表面皺化
Electrochemical-induced faceting of noble metal
指導教授: 黃英碩
Ing-Shouh Hwang
郭鴻曦
Hong-Shi Kuo
口試委員:
學位類別: 碩士
Master
系所名稱: 工學院 - 材料科學工程學系
Materials Science and Engineering
論文出版年: 2008
畢業學年度: 96
語文別: 中文
論文頁數: 53
中文關鍵詞: 電化學皺化
外文關鍵詞: Electrochemical, Faceting
相關次數: 點閱:3下載:0
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  • 本實驗以高頻交流極化方法在1M H2SO4中誘發貴金屬表面皺化,並討論表面皺化結構和各種參數的效應。實驗結果顯示銥表面經處理後分別在{111}上和{311}及{210}上成長出兩種皺化結構。極化電位上界過高會造成貴金屬溶解,過低則無法誘發皺化,此外在陰極電位氫的吸附/去吸附,亦影響皺化結構的產生。除了單晶銥球,銥針亦能以此方法誘發皺化形成新的針尖。


    第一章 緒論 1-1 研究簡介...............................1 1-2 皺化簡介...............................1 1-2-1 皺化產生法 ....................1 1-2-2 皺化所描述的結構...............1 第二章 論文回顧 2-1 皺化機制.......................4 2-1-1 概論...........................4 2-1-2 熱力學觀點點...................4 2-1-3 動力學觀點點...................5 2-2 電化學誘發皺化研究背景.........5 2-3 電化學誘發皺化的研究究.........7 2-3-1 各種元素和溶液的選擇...........7 2-3-2 皺化結構的觀察.................7 第三章 實驗步驟及儀器簡介 3-1 實驗的預先準備..........................9 3-1-1 試片的準備與處理.................9 3-1-2 溶液的製備 ..................10 3-2 儀器介紹...............................10 3-2-1 機械儀器........................10 3-2-2 玻璃容器........................11 3-3 實驗過程...............................11 第四章 實驗結果與討論 4-1 未經電化學處理的金屬表面形貌 ..........16 4-2 經電化學誘發皺化處理後的表面形貌 ......16 4-2-1 鉑球 ...........................16 4-2-2 更改電位對鉑之效應..............19 4-2-3 銥球......... ..................22 4-2-4 銥針......... ..................28 4-2-5 CV圖......... ..................30 4-3 電位對銥皺化的效應..............30 4-3-1 電位上界不足時產生的結構........30 4-3-2 電位上界過大的效應..............33 4-3-3 電位下界的效應..................33 4-3-4 CV圖......... ..................35 4-3-5 討論............................40 4-4 時間對於銥針皺化的效應.................42 4-5 其他影響...............................43 第五章 結論...................................46 參考文........................................47 附錄..........................................53

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