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研究生: 邱俞鈞
CHIU, Yu-Chun
論文名稱: 芳香基表面修飾之奈米金粒子與其在氣體感測器之應用
Preparation of alkylaryl-modified gold nanoparticles and their applications to organic gas sensors
指導教授: 洪偉修
學位類別: 碩士
Master
系所名稱: 化學系
Department of Chemistry
論文出版年: 2013
畢業學年度: 101
語文別: 中文
論文頁數: 84
中文關鍵詞: 奈米金粒子重氮鹽有機氣體感測器
英文關鍵詞: gold nanoparticles, diazonium salts, organic gas sensor
論文種類: 學術論文
相關次數: 點閱:219下載:1
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  • 本篇論文主要藉由兩種不同反應條件的兩相合成法,將不同碳鏈
    的芳香基重氮鹽修飾至奈米金粒子表面,得到四個不同的新型材料,
    分別為New 6C-Au、New 8C-Au、New 10C-Au、Old 10C-Au,藉由
    1H-NMR、FT-IR、UV-Vis、TEM、Raman、XRD、EDS 儀器和技術,
    鑑定及分析材料的結構及組成,證實製程成功將芳香基重氮鹽修飾至
    奈米金粒子表面。
    將製備完成的材料應用於有機氣體感測器,利用質量式(QCM)及
    阻抗式(CR)兩種氣體感測器,進行有機氣體感測器應用,可以有效的
    應用於n-Butyl acetate、n-Butanol、n-Octane、Toluene 氣體感測。由
    QCM 的感測結果得知,材料對有機氣體的選擇性為BA  Octane 
    Toluene  Butanol,而CR 感測結果顯示,材料的選擇性則為: 極性氣
    體分子 非極性氣體分子,本論文由材料結構的差異探討氣體選擇性
    的影響。

    In this thesis, 4-alkylaryl layers were modified onto the gold nanoparticles via reduction of their diazonium salts. Two types of modified gold nanoparticles were obtained with different reaction conditions in the two-phase synthesis. As a results, there were four types of gold nanoparticles (i.e. New 6C-Au, New 8C-Au, New 10C-Au and Old 10C-Au) modified with 4-alkylaryls which were different in the alkyl
    chain length and reaction conditions. The composition of reaction precursors and gold nanoparticles were characterized with various techniques, e.g. 1H-NMR, FT-IR, UV-Vis, TEM, Raman, XRD and EDS.
    The resulting gold nanoparticles coated with 4-alkylaryl layers were utilized in application of sensing organic gas compounds. Materials coated onto both chemiresistor (CR) and quartz crystal microbalance (QCM) transducers as chemical sensors for the detection of airborne
    volatile organic compounds (VOCs). The VOCs studied in the work were n-butyl acetate, n-butanol, n-octane and toluene. The sequence of QCM selectivity for these gold nanopartilces are BA Octane Toluene Butanol. Nevertheless, the CR sensor is more selective to polar gas than
    nonpolar gas. Our results indicate that the sensitivity of gas compound is strongly related to the chemical structures of coated molecules.

    摘要 I Abstract II 謝誌 III 目錄 IV 圖目錄 VII 表目錄 IX 第一章 緒論 1-1 前言 1 1-2 芳香基重氮鹽(Aryl diazonium salts)簡介 3 1-3 奈米微粒基本理論 3 1-4 奈米材料結構介紹 5 1-5 阻抗式化學感測器(CR)之氣體感測理論 7 1-6 質量式化學感測器(QCM)之氣體感測理論 11 1-6-1 壓電效應(Piezoelectrics Effect) 11 1-6-2 振盪頻率與吸附質量關係 13 第二章 文獻回顧 2-1 芳香基重氮鹽的發展及應用 16 2-2 兩相合成法 20 2-3 自發反應還原法 23 第三章 實驗流程及儀器介紹 3-1 實驗藥品 25 3-2 實驗儀器 27 3-3 實驗流程 29 3-4 實驗步驟 30 3-5 實驗原理 35 3-5-1 核磁共振儀 35 3-5-2 傅立葉紅外線光譜儀 35 3-5-3 紫外光-可見光光譜儀 36 3-5-4 粉末X 光繞射儀 37 3-5-5 穿透式電子顯微鏡 37 3-5-6 能量分散式X 光光譜儀 38 3-5-7 拉曼光譜 41 第四章 結果與討論 4-1 Ligand 之1H-NMR 結構鑑定 46 4-2 Ligand 之FT-IR 結構鑑定 49 4-3 四個不同材料的UV-Vis 光譜分析 51 4-4 四個不同材料的TEM 圖譜分析 53 4-5 四個不同材料的XRD 光譜分析 58 4-6 四個不同材料的拉曼光譜分析 61 4-7 四個不同材料的EDS 光譜分析 64 4-8 有機氣體感測器的實驗數據分析 67 第五章 結論 78 參考文獻 80

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