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研究生: 郭昶志
Chih-chang Kuo
論文名稱: 製程參數對多元醇法製作銀次微米線之影響
The Effects of Experimental Parameters on Poloyl-prepared Submicron Ag wires
指導教授: 郭東昊
Dong-Hau Kuo
鄭如茵
Ju-Yin Cheng
口試委員: 薛人愷
none
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: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 94
中文關鍵詞: 次微米銀線多元醇法一維銀線
外文關鍵詞: One-dimensional Ag wires, polyol method, submicron
相關次數: 點閱:266下載:2
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本論文主要是在討論利用化學溶液來製備次微米銀線,我們使用多元醇法來製備一維銀線,並去討論不同的反應溫度、反應時間、化學物種莫耳比、及成核劑對實驗的影響。次微米銀線的製備方式主要分為兩個步驟,首先我們會利用乙二醇還原PtCl2成Pt粒子,做為異質成核的成核晶種來輔助成長一維結構。第二步驟在包含有晶種液的反應液中,同時緩慢加入AgNO3及PVP溶液。並利用乙二醇來做還原劑來還原銀離子,並藉由PVP當軟模板使銀排列成一維型態。
在實驗過程中,我們不斷改變各式參數來討論次微米銀線的成長情況,並發現在這個實驗系統下,在PVP對AgNO3的mole比在1.5:1,反應溫度160℃、反應時間1小時、成核劑在5x10-4g等條下可以成長5~10μm、直徑200~250nm的次微米線,輔以SEM微視分析說明各種實驗參數不同的成長情況、TEM影像了解更細微的顯微結構、XRD分析鑑定的次微米銀線具有FCC結構、使用EDS及IR光譜來檢驗次微米銀線的成分及以UV-visible吸收光譜可以發現製程較好的參數條件所製得的次微米銀現在400nm有非常強的吸收鋒。


One-dimensional Ag wires with a submicron size were prepared by the polyol method in this thesis. The effects of reaction temperature, reaction time, ratio of silver nitrate and PVP (polyvinyl pyrrolidone), the nucleating agent of PtCl2 were investigated. Two steps proceeded in the production of Ag wires by the polyol method. The first one was the reduction of PtCl2 by the solvent of ethylene glycol (EG) to form the Pt particles for the purpose of heterogeneous nucleation. At the second step, the solutions of AgNO3 and PVP in EG were added to the reduced Pt solution. EG was used as the reducing agent to convert Ag+ into Ag and PVP as the soft template to assist the one-dimenstional growth.
The experimental results demonstrate that submicron-sized Ag with the lengths of 5~10 μm and diameters of 200~250 nm have been produced with the conditions of the PVP:AgNO3 ratio of 1.5:1, reaction temperature of 160oC, reaction time of 1h, and the Pt nucleating agent of 5×10-4g。 SEM and TEM were used to observe the microstructure of Ag wires grown at different conditions. The FCC structure of Ag wires was identified by X-ray diffractometry. EDS equipped on TEM was used to analyze the wire composition. To ensure the removal of PVP from Ag wires, the IR spectroscopy was applied. Strong absorption peaks at 400 nm detected by the UV-vis spectroscope identified the existence of the 1-D Ag wires.

致謝.............................................................................................................I 摘要............................................................................................................II ABSTRACT..............................................................................................III 圖目錄....................................................................................................VIII 表目錄..................................................................................................XVII 第一章 簡介.............................................................................................1 1-1 奈米材料特性概述..........................................................................1 1-2 奈米材料技術之分類......................................................................5 1-3 奈米材料的應用..............................................................................8 第二章 文獻回顧..................................................................................10 2-1奈米材料製備方法.........................................................................10 2-2 一維金屬奈米材料之製備............................................................12 2-2-1 水熱法製備奈米線.................................................................13 2-2-2 利用多孔矽模板合成奈米線.................................................15 2-2-3 電化學方式成長一維材料.....................................................18 2-2-4 利用光化學法製備奈米棒.....................................................20 2-2-5 利用溶液聲波化學法製作奈米線.........................................21 2-2-6 利用材料固有非等向性特徵生成一維結構.........................25 2-2-7 利用晶種異質成核法成長奈米線.........................................27 2-3 多元醇法........................................................................................29 2-3-1 利用多元醇法製作SnO2奈米線............................................29 2-3-2 多元醇法製備單晶鉛奈米線.................................................31 2-3-3 多元醇法與水熱方式共同生長銀奈米材料.........................33 2-3-4 生長機制討論.........................................................................35 第三章 研究動機與實驗方法................................................................42 3-1 研究動機........................................................................................42 3-2 實驗方法........................................................................................43 3-2-1 實驗藥品與儀器.....................................................................43 3-2-2 實驗步驟.................................................................................45 3-3儀器分析介紹.................................................................................50 3-3-1 穿透式/掃描式電子顯微鏡(TEM / SEM).............................50 3-3-2 X光粉末繞射儀系統(X-Ray Diffractometer).........................51 3-3-3 EDS成分分析..........................................................................52 3-3-4 FTIR-傅立葉紅外線光譜儀....................................................53 3-3-5紫外線-可見光光譜儀(UV-visible spectroscopy)..................53 第四章 結果與討論................................................................................54 4-1 成核點含量對成長一維銀的影響................................................54 4-2不同PVP與AGNO3莫耳比值對成長一維銀的影響....................60 4-3不同成長溫度對一維銀的影響.....................................................66 4-4不同成長時間對一維銀的影響.....................................................72 4-5化學物種添加順序的不同對成長一維銀的影響........................77 4-6 XRD結構分析................................................................................80 4-7 TEM與EDS顯微結構與組成分析.................................................83 4-8 IR與UV-VIS分析.............................................................................87 第五章 結論.............................................................................................90 參考文獻...................................................................................................91

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