博碩士論文 100222028 詳細資訊




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姓名 江岳(Yue Jiang)  查詢紙本館藏   畢業系所 物理學系
論文名稱
(Sulfur adsorption on Au(100): XPS, LEED and STM study)
相關論文
★ Exploration of new methods for growing Ag films on Au(111) studied by ARPES★ 二階段成長法成長銀薄膜在銅(111)面上利用光電子能譜研究
★ 利用角解析光電子能譜術研究銅薄膜在銀(111)基板上的成長★ 利用角解析光電子能譜術探測Ag/Au(111)系統中銀表面態受到光誘發的衰變情形
★ 利用角解析光電子能譜術探測Ag/Au(111)系統中銀表面態受到光誘發的衰變情形★ Adsorption and desorption of atomic hydrogen on the surface of thin Ag films on Au(111) studied with ARPES and XPS
★ Thin-film growth of Bi and S on Au(100) studied with LEED and XPS★ Silicon adsorption on Ag(111): XPS and LEED study
★ The growth of Bi on Ag(111) studied with STM, LEED and XPS★ The investigation of highly ordered Ag films on mica with STM, LEED and XPS
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摘要(中) 在本論文中,我們在超高真空的環境下,透過固態電化學的方式產生硫分子(S2)氣體,使其吸附於金(100)表面上,並利用X光光電子能譜術、低能量電子繞射、掃描穿隧顯微鏡來研究硫在金(100)上隨溫度的結構變化。當硫在室溫下的覆蓋率達到飽和時,由低能量電子繞射觀察到c(4x2)的重構,同時由X光光電子能譜術量測到三種不同硫的電子態。經過加熱至不同溫度後,除了電子態的變化外,隨著覆蓋率的降低,也依序觀察到c(4x4)與(6x6)的共存態、(6x6)、c(2x2)與(2x2)共存態、(2x2)等重構,直到加熱至550℃時可觀察到乾淨金(100)表面(5x20)之重構,顯示硫已從表面完全脫附(desorption)。硫在不同溫度下的重構,也經由掃描穿隧顯微鏡得到其原子排列情形,而S 2p和Au 4f電子能譜也被量測及分析。根據這些結果,我們提出了各個重構可能的原子模型。
摘要(英) The temperature-dependent adsorption of S on a clean Au(100)- (5x20) surface has been studied with X-ray photoelectron spectroscopy (XPS), low energy electron diffraction (LEED), and scanning tunneling microscopy (STM), using a beam of S2 molecules generated by electrochemical decomposition of Ag2S. For the S adsorption at room temperature, a c(4x2) surface reconstruction is observed with LEED for saturation coverage, and the XPS study of S 2p from the S adlayer reveals the presence of three components. As the S coverage decreases during annealing, the surface undergoes a series of transformations, in the order of the coexistence of c(4x4) and (6x6), (6x6), coexistence of c(2x2) and (2x2) ,(2x2) ; the S adlayer desorbs completely at 550℃. Each reconstruction structure was investigated with STM, and the corresponding photoemission spectra of the S and Au core levels were measured and analyzed. Combining these results, the atomic models for the varied reconstructions were proposed.
關鍵字(中) ★ 掃描穿隧顯微鏡
★ 低能量電子繞射
★ X-ray 光電子能譜
關鍵字(英) ★ Scanning Tunneling Microscopy
★ Low Energy Electron Diffraction
★ X-ray Photoemission Spectroscopy
論文目次 摘要 ............................................................................................................................................ I
Abstract .................................................................................................................................... II
誌謝 ......................................................................................................................................... III
目錄 ......................................................................................................................................... IV
圖目錄 ..................................................................................................................................... VI
表目錄 ....................................................................................................................................... X
第一章 簡介 ........................................................................................................................ 1
第二章 文獻回顧 ................................................................................................................ 3
2.1 金(100)的重排現象 ................................................................................................... 3
2.2 硫在金單晶面上的相關文獻 .................................................................................... 4
2.2.1 S/Au(100) ........................................................................................................... 4
2.2.2 S/Au(111) ............................................................................................................ 5
第三章 實驗儀器與步驟 .................................................................................................. 12
3.1 簡介 .......................................................................................................................... 12
3.2 超高真空 .................................................................................................................. 12
3.2.1 機械幫浦(Mechanical Pump)........................................................................... 13
3.2.2 分子渦輪幫浦(Turbo Molecular Pump) .......................................................... 14
3.2.3 離子幫浦(Ion Pump) ........................................................................................ 14
3.2.4 鈦昇華幫浦(Titanium Sublimation Pump) ...................................................... 14
3.3 同步輻射光源 .......................................................................................................... 14
3.4 X-ray 光電子能譜 ( X-ray Photoemission Spectroscopy, XPS ) ............................ 15
3.4.1 原理 .................................................................................................................. 15
3.4.2 曲線分析 .......................................................................................................... 16
3.5 低能量電子繞射 ( Low Energy Electron Diffraction, LEED ) .............................. 16
3.6 掃描穿隧顯微鏡 ( Scanning Tunneling Microscopy, STM ) ................................. 18
3.6.1 基本原理 .......................................................................................................... 18
3.6.2 儀器構造 .......................................................................................................... 19
3.6.3 掃描模式 .......................................................................................................... 19
3.6.4 探針製作 .......................................................................................................... 20
3.7 硫產生器 .................................................................................................................. 21
3.8 離子濺射槍 .............................................................................................................. 21
3.9 樣品清潔與加熱 ...................................................................................................... 22
3.9.1 STM 系統 ......................................................................................................... 22
3.9.2 NSRRC Wide Range 實驗站系統 ................................................................... 22
第四章 實驗結果與討論 .................................................................................................. 30
4.1 樣品製備 .................................................................................................................. 30
4.2 Au(100)表面於室溫下逐次曝少量硫至飽和 ......................................................... 30
4.3 Au(100)表面於室溫下曝硫至飽和並退火 ............................................................. 33
4.4 S/Au(100)-p(2x2)表面室溫下曝硫至飽和 ............................................................. 36
4.5 討論 .......................................................................................................................... 38
第五章 結論 ...................................................................................................................... 59
第六章 參考文獻 .............................................................................................................. 60
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指導教授 陸大安(Dah-An Luh) 審核日期 2013-7-23
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