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研究生: 陳逸修
Chen, Yi-Hsiu
論文名稱: 利用不同形狀金/銀奈米顆粒製備Langmuir-Blodgett薄膜及螢光增強測試
Fabrication of Langmuir-Blodgett films using gold/silver nanoparticles with different shapes for plasmon-enhanced fluorescence
指導教授: 陳家俊
Chen, Chia-Chun
學位類別: 碩士
Master
系所名稱: 化學系
Department of Chemistry
論文出版年: 2019
畢業學年度: 107
語文別: 中文
論文頁數: 62
中文關鍵詞: 金奈米棒金/銀-核/殼奈米長方體金棒-金銀合金奈米搖鈴型結構金屬螢光增強Langmuir – Blodgett
英文關鍵詞: Gold Nanorods, Au@Ag Nanocuboids, Gold/Silver Nanorattles, Metal-Enhanced Fluorescence, Langmuir-Blodgett
DOI URL: http://doi.org/10.6345/NTNU201900346
論文種類: 學術論文
相關次數: 點閱:154下載:21
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  • 金屬螢光增強(Metal-Enhanced Fluorescence,MEF)應用於生物傳感器已經有了許多深入的研究,其設計了各種金屬奈米結構來改變近場的電磁場強度,以用來增強鄰近分子的螢光強度。金屬奈米結構,例如金和銀等材料對螢光有著強烈的影響,像是金屬奈米材料可以與近端螢光團相互作用可以增加其量子產率、降低螢光生命週期、增加光穩定性和增加螢光共振能量轉移的距離等等,通常兩者距離約在10nm時有最佳螢光增強效果。在本實驗中透過製備金奈米棒、金/銀-核/殼奈米長方體結構及金-金銀合金奈米搖鈴型結構,且以Langmuir-Blodgett (LB)將金屬奈米材料沉積在金島狀及羧酸化玻璃片的兩種基板上。用四種不同的壓力控制奈米材料在基板上的密度,分別為5mN/m、8mN/m、14mN/m、17mN/m。使用Cy5、IR800這兩種螢光染劑觀察金屬螢光增強現象。發現了5mN/m-金/銀-核/殼結構-羧酸化玻璃-IR800有著最高的螢光倍率,其螢光增強倍率可達177倍。期望在未來能應用於生化檢測。

    Metal enhanced fluorescence (MEF) has been intensively applied in the field of fluorescence-based biosensing. Various metal nanostructures have been developed to increase the fluorescence intensities by placing the fluorophores within the enhanced electromagnetic field at the near-field range. Metal nanomaterials, such as gold and silver, have been demonstrated a strong influence on fluorescence. Metal nanostructures can interact with the proximal fluorophores to increase quantum yield, reduce fluorescence lifetime, increase photostability, and increase the distance of fluorescence resonance energy transfer. Generally, when the distance between the metal surface and fluorophore is about 10 nm, fluorescence intensities show the best enhancement. In this study, we utilized the Langmuir-Blodgett (LB) technique to deposit three different nanoparticles, including gold nanorods, Au@Ag core-shell nanocuboids and Au-Ag nanorattles, on two kinds of substrates (gold nanoisland films and carboxylated polysine slides (glass)). Four different pressures (5 mN/m, 8 mN/m, 14 mN/m and 17 mN/m) were controlled to manipulate the particle densities on the prepared metal films. Further, for the fluorescence enhancement, Cy5 and IR800 fluorescent dyes were used as the fluorophores to calculate their enhancement factors. The highest fluorescence enhancement of 177-fold was obtained for IR800 dyes, when the substrate was prepared by depositing Au@Ag core-shell nanocuboids on the glass substrate at a pressure of 5 mN/m. The promising fluorescence enhancement showed the potential for the application of biochemical detection.

    謝誌 I 摘要 II Abstract III 目錄 IV 圖表目錄 VII 表目錄 XI 第一章 緒論 1 1-1 貴金屬奈米材料的性質 1 1-2 貴金屬螢光增強應用 3 1-3 金屬螢光增強(Metal-Enhanced Fluorescence, MEF) 5 1-4 局部表面電漿共振 7 第二章 文獻回顧與研究動機 9 2-1 金/銀奈米材料之合成 9 2-1-1 金奈米棒 9 2-1-2 金奈米棒再生長銀的金/銀-核/殼奈米長方體結構(Au@Ag nanocuboids) 11 2-1-3 金棒-金銀合金奈米搖鈴型結構 14 2-2 Ag nanocubes on a metal film (NOM)結構 16 2-3 Langmuir-Blodgett (LB) 18 2-4 研究目的 20 第三章 實驗儀器與步驟 21 3-1 實驗藥品 21 3-2 實驗器材及儀器介紹 23 3-2-1 往復式振盪恆溫水槽(B601D) 23 3-2-2 恆溫循環水槽(FIRSTEK B401H) 23 3-2-3 玻片迷你微量離心機 24 3-2-4 24孔盤(ProPlate® Multi-Well Chambers) 24 3-2-5 迴轉式震盪器(OS-701) 25 3-2-6 紫外光-可見光吸收光譜儀(UV-Visible spectrophotometer) 25 3-2-7 掃描式電子顯微鏡(Scanning Electron Microscope,SEM) 26 3-2-8 穿透式電子顯微鏡(Transmission Electron Microscope,TEM) 26 3-2-9 離心機(Centrifuge) 27 3-2-10 微陣列螢光掃描儀(Microarray Fluorescence Scanning Device) 27 3-2-11 分子膜製備機(Langmuir-Blodgett Film) 28 3-2-12 紫外光-可見光-近紅外光分光光譜儀(UV-vis-NIR) 29 3-3 實驗步驟 30 3-3-1 金奈米棒之合成 30 3-3-2 金奈米棒之再生長銀 30 3-3-3 金棒-金銀合金奈米搖鈴型結構之合成 31 3-3-4 奈米金屬之轉相 31 3-3-5 製備金奈米島狀薄膜 32 3-3-6 金屬單層薄膜之製備 32 3-3-7 金屬薄膜之螢光測試 33 第四章 結果與討論 34 4-1 金屬奈米顆粒之鑑定 34 4-1-1 金奈米棒 34 4-1-2 金/銀-核/殼奈米長方體結構 34 4-1-3 金棒-金銀合金奈米搖鈴型結構 35 4-2 金屬奈米顆粒之轉相 36 4-3 金屬奈米顆粒之Langmuir–Blodgett 39 4-3-1 不同奈米結構之Langmuir–Blodgett 39 4-3-2 不同壓力金/銀-核/殼結構之Langmuir–Blodgett 43 4-4 金屬奈米顆粒之螢光測試 46 4-4-1 不同奈米結構螢光測試 46 4-4-2 不同壓力金/銀-核/殼奈米長方體結構之螢光測試 52 第五章 結論 58 參考文獻 59

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