研究生: |
侯勁龍 |
---|---|
論文名稱: |
覆鈀鉭針之皺化結構研究 The faceting structures of Pd covered Ta tips |
指導教授: | 傅祖怡 |
學位類別: |
碩士 Master |
系所名稱: |
物理學系 Department of Physics |
論文出版年: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 55 |
中文關鍵詞: | 覆鈀 、鉭 、皺化 |
論文種類: | 學術論文 |
相關次數: | 點閱:142 下載:21 |
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本研究先以多晶鉭線材在真空退火下再次結晶,並以掃描電子顯微鏡(SEM)與聚焦離子束(FIB)系統檢視晶粒擴大現象,其蝕刻成針尖形樣品後,結構較為穩固,提高在場離子顯微鏡(FIM)觀察時的電場耐受度。而鉭線退火於壓力10-6~10-7 Torr下,以SEM觀測表面發現因殘餘氣體誘發的皺化結構,以FIM系統鋪氧測試多組退火參數,尚未發現皺化結構。而覆鈀鉭針以675°C~685°C退火觀察,可發現由3個{110}擴張聚向鉭(111)面的皺化結構。
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