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研究生： 林寬哲
Lin, Kuan-Che
論文名稱： 使用電氧化沉積方式製備奈米金核@氧化鐵殼奈米結構材料
Synthesis of Gold@Iron Oxide Core-Shell Nanostructures via an Electroxidation Procedure
指導教授： 黃郁棻
Huang, Yu-Fen
口試委員: 黃志清
Chih-Ching Huang
林宗宏
Zong-Hong Lin
學位類別： 碩士
Master
系所名稱： 原子科學院 - 生醫工程與環境科學系
Department of Biomedical Engineering and Environmental Sciences
論文出版年： 2014
畢業學年度： 103
語文別： 中文
論文頁數： 71
中文關鍵詞： 核/殼奈米粒子 、金奈米粒子 、氧化鐵奈米粒子 、表面增強拉曼散射光譜
外文關鍵詞： core-shell nanoparticles, gold nanoparticles, iron oxide nanoparticles, SERS
相關次數： 點閱：3  下載：0 
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    • 核/殼奈米材料由於其特殊的物理及化學特性，因此受到學者們的注目。本研究希望建立一套合成方法製備金/氧化鐵核殼奈米粒子。我們使用電沉積的方式，通過控制環境 pH值、緩衝溶液濃度及反應時間等參數，在水溶液中以檸檬酸鈉還原的金奈米粒子為核，將鐵氧化物沉積於金奈米粒子表面形成可調控鐵氧化物殼層厚度的金/氧化鐵核殼奈米粒子。鐵氧化物殼層厚度介於 5 ~ 15 nm之間的金/氧化鐵核殼奈米粒子在生物環境下具有高穩定性且能在拉曼光譜儀上偵測到拉曼分子的振動訊號。將金/氧化鐵核殼奈米粒子在 350℃氮氣環境下持續煅燒六個小時，在吸收光譜上觀察到明顯紅位移變化，在超導量子干涉儀上觀測到超順磁的特性。此結果增加金/氧化鐵核殼奈米粒子在核磁造影及磁導引靶向治療方面的潛力。

    Core-shell nanostructures have attracted considerable interest as a new class of nanomaterials due to the fascinating physical and chemical characteristics. Herein, a facial and low-cost approach was reported for the synthesis of gold@iron oxide core-shell nanoparticles. By using the citrate-stabilized gold nanoparticles as seeds, the gold@iron oxide nanoparticles were prepared via an electroxidation of iron nail at 1.0 V between the electrodes in aqueous solution. Modulating with the parameters such as pH values, buffers and reaction time make the iron shell thickness to be well controlled. The optimized shell thickness was further utilized with gold narnoparticles for the surface-enhanced Raman scattering (SERS) effect by Raman spectrometry application. Most importantly, gold@iron oxide nanoparticles turn superparamagnetic after annealing at 350℃ for six hours under nitrogen environment. The enhanced magnetic properties of the resulting core-shell nanoparticles show their future potential in magnetic resonance imaging as well as targeted delivery through magnetofection.

    摘要 2 Abstract 3 致謝 4 總目錄 5 圖目錄 10 表目錄 11 第一章 緒論 12 1.1 奈米材料 12 1.1.1 奈米材料介紹 12 1.1.2 核/殼奈米材料分類及介紹 13 1.1.3 核/殼奈米材料應用 15 1.2 金與氧化鐵核殼型複合奈米材料 16 1.2.1 金奈米粒子特性 16 1.2.2 氧化鐵奈米粒子特性 17 1.2.3 金與氧化鐵核殼型複合奈米材料特性、製備及應用 19 1.3 拉曼光譜儀 21 1.3.1 拉曼光譜介紹 21 1.3.2 表面增強拉曼散射光譜介紹 23 1.4 研究動機與目的 25 第二章 實驗材料與方法 27 2.1 實驗藥品與儀器 27 2.1.1 實驗藥品 27 2.1.2 緩衝溶液配置 28 2.1.3 細胞培養與使用 29 2.1.4 儀器 29 2.2 金/氧化鐵奈米核殼粒子的合成與特性鑑定 31 2.2.1 金奈米粒子的合成與特性鑑定 31 2.2.2 金奈米粒子載覆 2-萘硫酚分子的合成 31 2.2.3 將十二烷基硫酸鈉修飾於金奈米粒子表面的合成 31 2.2.4 金奈米粒子載覆 4-巰基嘧啶分子的合成 32 2.2.5 金/氧化鐵奈米核殼粒子的合成 32 2.2.6 金/氧化鐵奈米核殼粒子的鑑定 32 2.2.7 金/氧化鐵奈米核殼粒子載覆不同拉曼分子的拉曼訊號 33 2.3 金/氧化鐵奈米核殼粒子與目標細胞 HeLa cell 的拉曼訊號 33 2.3.1 金/氧化鐵奈米核殼粒子於生物環境的穩定性 33 2.3.2 暗視野顯微鏡影像 33 2.3.3 細胞內拉曼分子的振動光譜訊號 34 2.5 製備具有磁性的金/氧化鐵奈米核殼粒子與磁性鑑定 34 2.5.1 金/氧化鐵奈米核殼粒子煅燒實驗 34 2.5.2 回溶煅燒後的金/氧化鐵奈米核殼粒子 35 2.5.3 超導量子干涉儀實驗 35 2.5.4 磁振造影實驗 35 第三章 實驗結果與討論 36 3.1金/氧化鐵奈米核殼粒子的特性鑑定 36 3.1.1金/氧化鐵奈米核殼粒子的光譜特性 36 3.1.2金/氧化鐵奈米核殼粒子粒徑大小及表面電位分析 36 3.1.3 金/氧化鐵奈米核殼粒子結構分析 37 3.1.4 合成機制探討 37 3.2 奈米載體於拉曼光譜上的感測 39 3.2.1 奈米載體的拉曼光譜 39 3.2.2 奈米載體在生物環境下的穩定性 40 3.2.3 奈米載體在細胞條件下的拉曼光譜 41 3.3 金/氧化鐵奈米核殼粒子煅燒後的特性鑑定 41 3.3.1 煅燒後材料組態及結構分析 41 3.3.2 磁特性分析 42 第四章 結論 44 圖表說明 45 參考文獻 66

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