跳到主要內容

簡易檢索 / 詳目顯示

回結果列表
研究生： 江岳
Yue Jiang
論文名稱： Sulfur adsorption on Au(100): XPS, LEED and STM study
指導教授： 陸大安
Dah-An Luh
口試委員:
學位類別： 碩士
Master
系所名稱： 理學院 - 物理學系
Department of Physics
論文出版年： 2013
畢業學年度： 101
語文別： 中文
論文頁數： 74
中文關鍵詞： 掃描穿隧顯微鏡 、低能量電子繞射 、X-ray 光電子能譜
外文關鍵詞： Scanning Tunneling Microscopy, Low Energy Electron Diffraction, X-ray Photoemission Spectroscopy
相關次數： 點閱：12  下載：0 
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報

    • 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。

    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.

    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

    [1] J. Gong, Chem Rev. 112, 2987 (2012).
    [2] S. A. Krasnikov, G. Hughes, and A. A. Cafolla, Surf. Sci. 601, 3506 (2007).
    [3] M. Kostelitz, J. L. Domange, and J. Oudar, Surf. Sci. 34, 431 (1973).
    [4] D. G. Fedak and N. A. Gjostein, Surf. Sci. 8, 77 (1967).
    [5] J.F Wendelken and D.M Zehner, Surf. Sci. 71, 178 (1978).
    [6] Heimann P., Van Der Veen J.F., and Eastman D.E., Solid State Commun. 38, 595 (1981).
    [7] G.K. Binnig, et al., Surf. Sci. 144, 321 (1984).
    [8] J. De La Figuera, et al., Phys. Rev. B. 58, 1169 (1998).
    [9] J P Biberian and G E Rhead, J. Phys. F: Met. Phys. 3, 675 (1973).
    [10] M. Kostelitz and J. Oudar, Surf. Sci. 27, 176 (1971).
    [11] V. Bondzie, S. Dixon-Warren, and Y. Yu, J. Chem. Phys. 111, 10670 (1999).
    [12] Monika M. Biener, Juergen Biener, and Cynthia M. Friend, Surf. Sci. 601, 1659 (2007).
    [13] J. A. Rodriguez, et al., J Am Chem Soc. 125, 276 (2003).
    [14] M. Yu, et al., J. Phys. Chem. C. 111, 10904 (2007).
    [15] U. Demir and C. Shannon, Langmuir. 12, 594 (1996).
    [16] C. Vericat, et al., Electrochimica. Acta. 49, 3643 (2004).
    [17] Introduction to Solid State Physics, Charles Kittel, 8th edition, 2005
    [18] 真空技術與應用, 行政院國家科學委員會精密儀器發展中心, 民國90年
    [19] Basic Vacuum Practice, Varian Associates., 3rd Edition, Lexington, 1992
    [20] NSRRC,http://www.srrc.gov.tw/.
    [21] L.J. Lai, et al., Nucl. Instrum. Methods Phys. Res., Sect. A. 467-468, 586 (2001).
    [22] 賴英煌, 邱雯藝, and 洪偉修, CHEMISTRY (THE CHINESE CHEM. SOC., TAIPEI). 60, 381 (2002).
    [23] Surface Analysis: The Principal Techniques, John C. Vickerman and Lan S. Gilmore, John Wiley & Sons, 2009
    [24] Surfaces, Gary Attard and Colin Barnes, Oxford University Press, 1998
    [25] Introduction to Scanning Tunneling Microscopy, C. Julian Chen, Oxford University Press, 1993
    [26] W. Heegemann, et al., Surf. Sci. 49, 161 (1975).
    [27] 黃志豪, Epitaxial growth of thin Cu films on Ag(111) studied with ARPES, 國立中央大學物理所, 碩士論文, 民國99年
    [28] Y. W. Yang and L. J. Fan, Langmuir. 18, 1157 (2002).
    [29] A. R. Alemozafar and R. J. Madix, J. Phys. Chem. B. 109, 11307 (2005).
    [30] A. D. Daigle and J. J. Belbruno, J. Phys. Chem. C. 115, 22987 (2011).

    QR CODE
    :::