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姓名	黃姵珊(Pei-shan Huang)  查詢紙本館藏	畢業系所	物理學系
論文名稱	氫氣的調控對化學氣相沉積法成長石墨烯之影響 (Study of Graphene Grown by Low Pressure Chemical Vapor Deposition with Different H2/CH4 Ratio.)
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摘要(中)	本文是探討氫氣對成長石墨烯的影響，本研究中以氫氣、甲烷為反應氣體利用低壓化學氣相沉積法成長在銅箔上。探討在製程條件上改變氫氣流量，對LPCVD成長石墨烯之影響。所成長之石墨烯主要以拉曼光譜分析其石墨化品質。此外，並以掃描式電子顯微鏡(Scanning Electron Microscopy, SEM)分別檢視成長之試片表面形貌。實驗結果顯示，本研究成功以LPCVD方法成長石墨烯，在氣體比例H2/CH4=100 sccm/10 sccm，獲得最佳品質之石墨烯，可能的原因為氧氣與大量H2及CHx反應生成OH等自由基，平衡製程環境中C與H自由基而獲得較高品質。由SEM結果在氫氣流量為100sccm時，觀察到六角結構的石墨烯。同時，拉曼分析結果表示氣體比例H2/CH4=100 sccm/10 sccm時，半高寬約為30cm-1以及2D/G比例為2.5。證明大流量的氫氣的條件下，較易成長出高品質的石墨烯。
摘要(英)	The purpose of the research was to investigate graphene with different hydrogen flow. Graphene were growth on Copper foil as substrate by Low pressure chemical vapor deposition system with H2 and CH4 as source gases. Graphene were examined by SEM、FTIR and Raman spectroscopy to evaluate their structures and properties. The experimental results show that we successfully growth graphene by LPCVD. When the gas ratio of H2/CH4 = 100 sccm/ 10 sccm, we get the best quality of graphene due to the Oxygen and Hydrogen and CHx the reaction of OH radicals, C and H radicals in the environment of the balancing process to receive a higher quality. From SEM image results reveal that of graphene domains, which has a hexagonal shape on a cooper foils at 100sccm of hydrogen flow. Raman analysis results that gas ratio H2/CH4 = 100 sccm/10 sccm has 30cm-1 of FWHM 2.5 of 2D / G ratio.
關鍵字(中)	★ 石墨烯 ★ 化學氣相沉積法 ★ 銅箔	關鍵字(英)	★ Graphene ★ CVD ★ Cooper foil
論文目次	摘要 I Abstract II 目錄 III 圖目錄 IV 表目錄 VI 第一章 簡介 1 第二章 文獻回顧 5 2-1 石墨晶體結構 5 2-2 製備石墨烯之方法 11 2-2.1 膠帶法與微機械剝離法 12 2-2.2 碳化矽磊晶法 13 2-2.3 室溫散布塗佈法 14 2-2.4 氧化石墨烯化學還原法 15 2-2.5 過渡金屬表面析出法 18 2-3 化學氣相沉積法(Chemical Vapor Deposition) 22 2-3.1 石墨烯的成長機制 33 2-3.2 載流氣體之氫氣扮演的角色 34 2-4 研究動機 35 第三章 研究方法及實驗設備 36 3-1 化學氣相沉積介紹與製程變數 36 3-2 銅箔為催化劑的化學氣相沉積成長 41 3-3 薄膜分析與鑑定之儀器介紹 44 3-3.1 場發射式掃描電子顯微鏡 (FE-SEM) 44 3-3.2 拉曼光譜儀 (Raman Spectrometer) 47 3-3.3 傅立葉轉換紅外光譜儀 (FTIR spectrometer) 53 第四章 結果與討論 55 4-1 石墨烯之表面形貌分析 55 4-2 石墨烯之拉曼光譜分析 56 4-3 石墨烯之FTIR光譜分析 60 第五章 總結 64 5-1 結論 64 5-2 未來研究與發展方向 65 參考文獻 66
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指導教授	紀國鐘、李文獻 (Gou-chung Chi、Wen-Hsien Li)	審核日期	2012-8-20
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