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研究生： 蕭淳
Chun Hsiao
論文名稱： 奈米金棒/奈米碳材混成材料於表面增強拉曼散射之應用
Fabrication of Gold Nanorods/Nanocarbon Materials Hybrids for Use as Dynamic Surface-Enhanced Raman Scattering Substrates
指導教授： 邱智瑋
Chih-Wei Chiu
口試委員: 孫亞賢
Ya-Sen Sun
劉定宇
Ting-Yu Liu
鄭智嘉
Chih-Chia Cheng
學位類別： 碩士
Master
系所名稱： 工程學院 - 材料科學與工程系
Department of Materials Science and Engineering
論文出版年： 2019
畢業學年度： 107
語文別： 中文
論文頁數： 91
中文關鍵詞： 奈米金棒 、氧化石墨烯 、奈米碳管 、碳黑 、表面增強拉曼散射
外文關鍵詞： Gold nanorods, Graphene oxide, Carbon nanotubes, Carbon black, Surface-enhanced Raman Scattering
相關次數： 點閱：306  下載：0 
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    • 　　本研究是利用晶種成長法製備出不同長徑比的奈米金棒(AuNRs)結合不同維度的奈米碳材料，分別為氧化石墨烯(GO)、改質奈米碳管(CNT-COOH)、改質碳黑(OCB)，應用於表面增強拉曼散射(Surface Enhanced Raman Scattering, SERS)。奈米分散的原理是以十六烷基三甲基溴化銨(cetyltrimethylammonium bromide, CTAB)包覆穩定AuNRs，且AuNRs表面帶正電，會因靜電吸引力而吸附在帶負電的奈米碳材料上，形成AuNRs/奈米碳材複合物，此奈米混成材料具有良好的光學穿透性且能提高對於偵測物的接觸面積，可作為高靈敏度表面增強拉曼散射基材，並比較AuNRs結合不同維度奈米碳材料於SERS上之訊號差異。實驗結果可以由紫外-可見光譜儀(Ultraviolet-visible spectroscopy, UV-Vis)及穿透式電子顯微鏡(Transmission Electron Microscope, TEM)來確認AuNRs穩定且均勻的吸附在奈米碳材料上，於SERS上的結果顯示，AuNRs/GO複合物之增強訊號最好，因GO為二維奈米材料其厚度小於5 nm，故吸附在GO上的AuNRs可以產生良好的3D熱點效應。在SERS檢測中，對於染料分子Rhodamine 6G(R6G)的增強因子(Enhancement Factor, EF)為1×107，偵測極限為10-8M，達到很好的增強效果。進一步用於D-SERS上，由於D-SERS是檢測樣品由濕到乾的過程，因此在溶劑蒸發的過程中，會自發的形成大量的3D熱點，進而使SERS訊號大大的提升，從實驗結果顯示，AuNRs/GO複合物於D-SERS上之訊號增強效果最好，對於染料分子Rhodamine 6G(R6G)的增強因子(Enhancement Factor, EF)為1.1×108，偵測極限為10-9M，因此，AuNRs/GO複合物作為SERS的分子感測元件上擁有極高的靈敏度，非常適合在水質及環境中的單分子進行快速檢測。

    In this study, Gold nanorods (AuNRs) with different aspect ratios were prepared by seed-mediated growth method combined with different dimensions of nanocarbon materials (graphene oxide, carbon nanotubes, carbon black) for surface-enhanced Raman scattering (SERS). The principle of nanodispersion is to stabilize AuNRs with cetyltrimethylammonium bromide (CTAB), and the surface of AuNRs is positively charged, which will adsorb on negatively charged nanocarbon materials to form AuNRs/nanocarbon materials due to electrostatic attraction. This nano-mixed material has good optical penetration and can improve the contact area with the detector. It can be used as a high-sensitivity surface-enhanced Raman scattering substrate. We compared the signal differences between AuNRs and nanocarbon materials of different dimensions on SERS. The experimental results can be confirmed by Ultraviolet-visible spectroscopy (UV-Vis) and Transmission Electron Microscope (TEM) to confirm the stable and uniform adsorption of AuNRs on nanocarbon materials. The results on SERS show the AuNRs/GO complex has the best enhancement signal. Since GO is a two-dimensional nanomaterial with a thickness of less than 5 nm, the AuNRs adsorbed on GO can produce a good 3D hot junction effect. In the SERS test, the enhancement factor (EF) for the dye molecule Rhodamine 6G (R6G) is 1×107, and the limit of detection is 10-8M, which achieves a good enhancement effect. Further used on D-SERS, since D-SERS is a process for detecting samples from wet to dry, a large number of 3D hot spots are spontaneously formed during the evaporation of the solvent, thereby greatly improving the SERS signal. The experimental results show that the AuNRs/GO complex has the best signal enhancement effect on D-SERS. The enhancement factor (EF) for the dye molecule Rhodamine 6G (R6G) is 1.1×108, and the detection limit is 10-9M. Therefore, the AuNRs/GO complex acts as SERS's molecular sensing components are extremely sensitive and are ideal for rapid detection of single molecules in water and the environment.

    摘要…..………………………………………………………...…...……I Abstract………………………………....………………………..……...III 誌謝…….…………………………………………………..…….……...V 目錄…….……………………………………………………..………...VI 圖目錄….………………………………....……………………..….…...X 表目錄………………………...…………………….……..…………XVII 第一章 緒論 1 1.1 前言 1 1.2 研究目的 2 第二章 文獻回顧 3 2.1 奈米金材料的介紹 3 2.1.1 奈米材料的特點 3 2.1.2 奈米金棒(AuNRs)的結構及特性 5 2.1.3 奈米金棒的製備方法 7 2.1.4 奈米金棒的應用 9 2.2 界面活性劑 10 2.2.1 界面活性劑的介紹 10 2.2.2 陰離子界面活性劑 10 2.2.3 陽離子界面活性劑 11 2.3 碳材料(Carbon materials)的介紹 13 2.3.1 碳黑(Carbon black, CB)的結構性質 13 2.3.2 碳黑的製備方法 14 2.3.3 奈米碳管(Carbon nanotube, CNT)的結構性質 15 2.3.4 奈米碳管的製備方法 16 2.3.5 氧化石墨烯(Graphene oxide, GO)的結構性質 17 2.3.6 氧化石墨烯的製備方法 19 2.4 拉曼光譜儀(Raman scattering) 21 2.4.1 拉曼光譜的歷史 21 2.4.2 拉曼光譜的原理 21 2.4.3 表面增強拉曼光譜(SERS)的簡介 23 2.4.4 表面增強拉曼光譜機制 24 2.4.5 表面增強拉曼光譜之基材製備 27 2.4.6 表面增強拉曼光譜的應用 29 2.4.7 羅丹明6G(R6G)的SERS訊號 29 2.4.8 動態表面增強拉曼散射(Dynamic SERS) 31 第三章 實驗方法 33 3.1 實驗流程圖 33 3.2 實驗藥品與儀器 34 3.2.1 實驗藥品 34 3.2.2 實驗設備及儀器 35 3.3 實驗方法和原理 37 3.3.1 合成不同長徑比的AuNRs 37 3.3.2 AuNRs/OCB的合成 38 3.3.3 AuNRs/CNT-COOH的合成 39 3.3.4 AuNRs/GO的合成 39 3.3.5 鑑定及儀器分析 40 3.3.6 表面增強拉曼光譜實驗 43 3.3.7 動態表面增強拉曼光譜實驗 44 第四章 結果與討論 46 4.1 合成奈米金棒 46 4.1.1 不同長徑比之奈米金棒的合成 46 4.1.2 奈米金棒於SERS應用上之探討 49 4.2 合成奈米金棒/碳材複合物 52 4.2.1 AuNRs/OCB複合物之合成 52 4.2.2 AuNRs/CNT-COOH複合物之合成 55 4.2.3 AuNRs/GO複合物之合成 59 4.3 SERS效應與應用探討 63 4.3.1 AuNRs/OCB複合物之SERS效果及偵測極限 63 4.3.2 AuNRs/CNT-COOH複合物之SERS效果及偵測極限 ………………………………………………………...66 4.3.3 AuNRs/GO複合物之SERS效果及偵測極限 70 4.4 D-SERS效果之探討 75 4.4.1 AuNRs/OCB複合物之D-SERS效果 75 4.4.2 AuNRs/CNT-COOH複合物之D-SERS效果 77 4.4.3 AuNRs/GO複合物之D-SERS效果 80 第五章 結論 84 第六章 參考文獻 86

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