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研究生:鍾光聖
研究生(外文):Kuang-Sheng Chung
論文名稱:以金屬奈米結構增益表面電漿光觸媒於水解反應之研究
論文名稱(外文):Metallic Nanostructure for Plasmon-Enhanced Photocatalytic Water Splitting
指導教授:蔡定平
口試委員:任貽均王智明江海邦
口試日期:2013-07-15
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:物理研究所
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:中文
論文頁數:44
中文關鍵詞:表面電漿共振光伏材料奈米金屬粒子奈米結構光觸媒二氧化鈦
外文關鍵詞:surface plasmon resonancephotovoltaics materialsmetallic nanoparticlesnanostructurephotocatalysisTitanium dioxide
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本研究擬探討在金屬結構尺度小於入射電磁波波長時,所展現出的表面電漿共振(surface plasmon resonance, SPR)特性於光觸媒材料上的應用。表面電漿(surface plasmon)是金屬內自由電子受電磁波激發後的集體震盪,若與光子耦合沿金屬表面傳播即形成表面電漿極化子(surface plasmon-polaritons, SPPs),若為金屬奈米粒子則形成侷域化表面電漿共振(localized surface plasmon resonance, LSPR)。因表面電漿共振時具有將入射光轉為奈米尺度下集中電磁場的性質,在應用上被部份光伏材料(photovoltaics materials)研究學者視為增益效率的方法之一。本論文以此概念為出發,使用二氧化鈦(Titanium dioxide)為光伏材料,結合銀粒子/隔層/金膜的多層膜結構與大面積金屬奈米溝軌,並量測其光觸媒效益作為驗證,分別探討近年來爭議不斷的奈米結構增強光伏效率的說法,與提出耦合增益光觸媒表現的新結構。

This essay is based on the phenomenon about surface plasmon resonance (SPR), which happens to free electron in nanostructured metal when irradiated EM wave, and its application in enhancing photocatalysis material, Titanium dioxide. Surface plasmon is the behavior of collective electron oscillation at the metal/dielectric interface, and if surface plasmon couple with incident photon, it becomes surface plasmon polaritons (SPPs) and would propagate along the surface; the other case is localized surface plasmon resonance (LSPR), which usually excited by light in metallic nanoparticles, and both of SPPs and LSPR would have novel properties such as turning the incident light into near field intensive EM wave. Thus, surface plasmon is regarded as one of the new approaches to enhance photovoltaics materials by some scholars. Starting from this point, here we combine Titanium dioxide and nanostructured metal, Ag nanoparticles/spacer/Au thin film, and self-developed method to fabricate large grating Au film, to test the idea of plasmonic photovoltaics devices. By measuring the photocatalysis performance, the controversial idea and debates about the mechanism is much more clarified, and a new structure to enhance photovoltaics material by the coupling of surface plasmon is proposed in this essay, separately.

口試委員會審定書 #
誌謝 i
中文摘要 iv
ABSTRACT iv
目錄 v
圖目錄 vii
表目錄 ix
第一章 緒論 1
第二章 表面電漿光伏材料與裝置簡介 3
2.1 表面電漿共振增強吸收 3
2.1.1 侷域性表面電漿共振 4
2.1.2 表面電漿極化子. 5
2.2 半導體光觸媒簡介 9
2.3 表面電漿與光觸媒交互作用機制 12
第三章 實驗架構與研究方法 17
3.1 前言 17
3.2 模擬計算方法 17
3.2.1 有限元素分析法 17
3.2.2 數值模擬計算模型. 18
3.3 樣品製備:四靶濺鍍系統 19
3.4 原子力顯微鏡 22
3.5 共焦拉曼顯微儀 23
3.6 光水解反應系統 25
第四章 實驗結果與分析 26
4.1 前言 26
4.2 表面電漿隔層耦合結構 26
4.2.1 結構設計與製作 26
4.2.2 反射光譜與模擬分析 27
4.2.3 拉曼訊號量測 29
4.2.4 水解反應光電流結果與討論 31
4.3 奈米光柵結構 32
4.3.1 結構設計與製作 32
4.3.2 光譜與模擬分析 34
4.3.3 光降解結果與討論 37
第五章 結論與展望 38
參考文獻 40

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