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理學院
物理學系
學位論文
學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73905
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search.filters.author.PAI,CHIA-JUI
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search.filters.author.白家瑞
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search.filters.subject.單原子針
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search.filters.subject.field ion microscopy
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search.filters.subject.pd
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search.filters.subject.single atom tip
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以場離子顯微鏡進行覆鉑及覆鈀單原子級針尖的研究
(
2011
)
白家瑞
;
PAI,CHIA-JUI
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實驗藉由場離子顯微鏡,對電化學電鍍法所製備覆鉑及覆鈀單原子級針尖進行研究;而藉由成長完成的覆鉑及覆鈀單原子針,我們亦可轉換至場發射(FEM)模式,觀察[100]、[221]皺化的場發射影像,並獲得其對應的場離子影像。 我們發現部份成長單原子針的實驗中,無法獲得良好的金字塔結構,是由於鋪覆針尖的氧化層所造成的,而當針尖存在氧化層會造成金字塔的稜線較長、針尖遍佈雜點、[211]面的原子列間距較寬…等現象,而針對皺化程度不同的覆鈀鎢針進行曝氧,我們也可以觀察到相似的場離子影像。
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