Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/98369
標題: 透明導電奈米銀線網格薄膜製備與特性研究
Fabrication and characterization of transparent conductive Ag nanowires mesh thin films
作者: 簡銘雍
Ming-Yung Chien
關鍵字: 透明導電薄膜;銀奈米線;transparent conductive thin films;Ag nanowires
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Hung' Synthesis of Nanowire-Shaped Silver by Polyol Process of Sodium Chloride' International Journal of Materials and Chemistry,2012,2(2),pp 75-78. [37] A. Nekahi,S.P.H. Marashi,D. Haghshenas Fatmesari' High yield polyol synthesis of round- and sharp-end silver nanowires with high aspect ratio' Materials Chemistry and Physics,2016,12(1),pp 130-137. [38] Bushra Bari,Jinhwan Lee,Taehee Jang,Phillip Won,Seung Hwan Ko,Khalid Alamgir,Muhammad Arshad,L. Jay Guo' Simple hydrothermal synthesis of very-long and thin silver nanowires and their application in high quality transparent electrodes ' Journal of Materials Chemistry A2016,7(5),pp 11356-11371. [39] Y. Gao,L. Song,P. Jiang,L.F. Liu,X.Q. Yan,Z.P. Zhou,D.F. Liu,J.X. Wang,H.J. Yuan,Z.X. Zhang,X.W. Zhao,X.Y. Dou,W.Y. Zhou,G. Wang,S.S. Xie,H.Y. Chen,J.Q. Li' Silver nanowires with five-fold symmetric cross-section' Journal of Crystal Growth,2005,4(1),pp 606-612. 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摘要: 
一維的金屬奈米結構,例如線、棒、帶狀結構因其獨特的電學、光學特性而受到廣泛的關注。其中在許多可能的候選金屬結構中銀奈米線(AgNW)因為其具有低片電阻以及高導熱性而引起許多的關注。合成銀奈米線的方法中又以多元醇法最受到廣泛採用,許多研究都提出,在固定的反應時間下,可以透過控制如加熱時間、氯化鈉添加量將可以控制整體的反應速率,多元醇方法當中適當的添加氯離子可以有效促進銀奈米線的形成。
本實驗利用多元醇法,將硝酸銀(AgNO3)添加在乙二醇當中,在155°C的環境下還原成銀奈米顆粒,且透過添加氯化鈉幫助反應及聚乙烯吡咯烷酮(PVP)作為封端劑限制其生長方向,在本研究中,透過微調PVP、硝酸銀、氯化鈉及反應溫度的方式,希望能尋找出適合配方以製成銀奈米線並塗佈成透明導電薄膜以比較片電阻及穿透率。
結果顯示,當調整氯化鈉由0.0002M、0.0004M及0.0012M變化中,可以透過反應液體的顏色變化去觀察到,較濃的氯化鈉會減緩整體反應的速率,這是由於氯化鈉會與銀反應成為氯化銀,且會緩慢釋放銀離子而減緩反應速率,鈉離子則會做為保護劑,防止稀出的銀離子受到氧化影響。
而PVP濃度可以做為調整銀奈米線直徑的方法,透過調整濃度添加較高濃度的PVP銀線直徑會上升,這可以在前面章節由0.061M調整至0.071M可以看到直徑微幅的上升的現象,但是較低的濃度下PVP會不利於作為導向劑發揮功能。
在本實驗當中我們在最佳的配方成功合成了長寬比達180左右的銀奈米線,其長度可達15~18um直徑達100~125nm,在稀釋後進行塗佈只需要塗佈兩層即可到達20Ω/sq的薄膜電阻,在400~700nm波長的穿透可達83%。

One-dimensional metal nanostructures, such as wire, rod, and ribbon structures, have received extensive attention due to their unique electrical and optical properties. Among them, silver nanowires (AgNW) have attracted much attention in many possible candidate metal structures because of their low sheet resistance and high thermal conductivity. The method of synthesizing silver nanowires is most widely used in the polyol method. Many studies have suggested that the reaction rate can be controlled by controlling the heating time and the amount of sodium chloride at a fixed reaction time. The proper addition of chloride ions in the polyol method can effectively promote the formation of silver nanowires.
In this experiment, silver nitrate (AgNO3) was added to ethylene glycol by the polyol method, and it was reduced to silver nanoparticles at 155 °C, and the reaction was supplemented by adding sodium chloride and polyvinylpyrrolidone (PVP) was used as a seal. The end agent limits its growth direction. In this study, by fine-tuning PVP, silver nitrate, sodium chloride and reaction temperature, it is hoped that a suitable formula can be found to make a silver nanowire and coated into a transparent conductive film to compare the tablets. Resistance and penetration.
The results show that when the adjustment of sodium chloride is changed from 0.0002M, 0.0004M and 0.0012M, it can be observed through the color change of the reaction liquid. Concentrated sodium chloride will slow down the overall reaction rate due to sodium chloride. It reacts with silver to form silver chloride, and slowly releases silver ions to slow down the reaction rate. The sodium ions act as a protective agent to prevent the oxidized silver ions from being affected by oxidation.
The PVP concentration can be used as a method to adjust the diameter of the silver nanowire. The diameter of the PVP silver wire will increase by adjusting the concentration. This can be seen from the previous section from 0.061M to 0.071M. Phenomenon, but PVP at lower concentrations will be detrimental to function as a directing agent.
In this experiment, we successfully synthesized silver nanowires with an aspect ratio of about 180 in the best formulation. The length can reach 15~18um and the diameter is 100~125nm. Only two layers need to be coated after dilution. It can reach a 20Ω/sq film resistor with a penetration of 83% at a wavelength of 400~700nm.
URI: http://hdl.handle.net/11455/98369
Rights: 同意授權瀏覽/列印電子全文服務,2018-08-31起公開。
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