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研究生: 曾咨耀
Tzu-Yao Tseng
論文名稱: 化學氣相沉積法合成石墨烯
Growth Graphene by Chemical Vapor Deposition
指導教授: 胡淑芬
Hu, Shu-Fen
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
論文出版年: 2012
畢業學年度: 100
語文別: 中文
論文頁數: 99
中文關鍵詞: 石墨烯銅箔化學氣相沉積法轉印
英文關鍵詞: Graphene, copper, chemical vapor deposition, transfer
論文種類: 學術論文
相關次數: 點閱:114下載:11
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  • 近年來隨著科技不斷進步,人類生活與科技更是密不可分,半導體與電子元件更是蓬勃發展。於半導體與電子元件逐漸縮小化之製程條件要求下,以往元件縮小技術面臨重大挑戰,此時直接製程微小奈米結構成為另一種趨勢。包括奈米碳管、奈米線與近年熱門新興材料石墨烯。其特有準二維結構與快速電子飄移率更是備受大家矚目。
    有別於2010年諾貝爾獎得主在2004年所發表機械撥離法,也就是於高定向熱解離石墨(HOPG)中,運用膠帶反覆黏貼,機率性取出單層石墨烯。然而因取之不易,故無法針對工業上之應用進行量產。故本實驗採用化學氣相沉積法(CVD),利用過渡金屬銅箔當作催化金屬,於銅箔表面沉積石墨烯,並轉移至所需基板上。
    根據2009年由美國德州大學R. S. Ruoff所率領之研究團隊在Science期刊發表,利用化學氣相沉積法於過渡金屬「銅」上合成95%以上單層石墨烯,因銅之自我限制機制,故當石墨烯完全覆蓋表面後將不再繼續沉積雙層甚至多層石墨烯。
    相較於單層石墨烯快速之電子飄移率,雙層至十幾層有更多於單層石墨烯之自由電子數,更有利於較高導電效率之應用發展。因此我們研究溫度、壓力與氣體流量比例對石墨烯樣品結構與層數改變之影響。利用拉曼光譜分析儀分析品質與結構缺陷。
    轉印製程中,我們利用PDMS支撐石墨烯並蝕刻銅箔,轉移至載玻片上。利用原子力顯微鏡與四點探針觀察厚度與其片電阻。

    總目錄.....................................................I 圖目錄...................................................III 表目錄.....................................................X 第一章 緒論.................................................1 1.1 研究動機................................................1 1.2 石墨烯之介紹............................................5 1.2.1石墨烯之結構與發現......................................5 1.2.2 石墨烯之電子能帶特性...................................6 1.2.2 石墨烯之電子結構特性..................................10 1.2.3 石墨烯之熱力學特性....................................11 1.3 石墨烯之特性總結........................................14 第二章 製備方法介紹.........................................15 2.1 機械剝離法.............................................15 2.2 熱裂解碳化矽磊晶法......................................15 2.3 化學還原氧化石墨烯法....................................16 2.4 化學氣相沉積法.........................................17 2.5 文獻回顧...............................................17 2.6 研究目的...............................................25 第三章 樣品製作與儀器分析....................................26 3.1 樣品製作流程...........................................26 3.2 催化金屬基材...........................................26 3.3 石墨烯薄膜製程.........................................29 3.4 石墨烯轉移製程.........................................34 3.5 樣品分析與特性量測......................................36 3.5.1 掃描式電子顯微鏡......................................36 3.5.2 拉曼光譜儀...........................................38 3.5.4 四點探針.............................................45 3.5.5 基礎電性量測.........................................48 第四章 結果分析與討論.......................................50 4.1 石墨烯樣品製作與拉曼光譜分析.............................50 4.1.1 調控製程溫度.........................................53 4.1.2 調控製程時間.........................................56 4.1.3 調控製程氣體流量......................................59 4.2 石墨烯樣品量測.........................................80 4.2.1 四點探針量測片電阻....................................80 4.2.2 原子力顯微鏡量測......................................84 4.2.3 基礎電性量測.........................................88 第五章 結論................................................93 參考文獻...................................................95

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