Synthesis and electrical properties of uniform silver nanoparticles for electronic applications
Synthesis and electrical properties of uniform silver nanoparticles for electronic applications
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DOI：
10.1007/s10853-008-3204-y
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发表时间：
2009-02-01
影响因子：
4.5
通讯作者：
Chen, Jianguo
中科院分区：
文献类型：
--
作者：
Chen, Dapeng;Qiao, Xueliang;Chen, Jianguo
由于银纳米粒子具有高导电性，它们被考虑用于电极的银浆。然而，银纳米粒子在导电胶（ECAs）中的分散性限制了它们作为导电填料的使用。一种简单的方法能够在聚乙烯吡咯烷酮（PVP）存在的情况下，通过乙醇还原硝酸银来合成银纳米粒子。已经对反应条件，例如硝酸银浓度、PVP浓度、反应时间和反应温度进行了研究。获得了银纳米粒子的良好分散性和窄尺寸分布。在将乙醇用作稀释剂来调节ECAs的挥发性时，通过将银纳米粒子重新分散在乙醇中而将它们添加到ECAs中，防止它们聚集并增加填充银片之间间隙的机会。所提出的这个工艺为有效利用这些合成的银纳米粒子来提高ECAs的导电性提供了可能性。
Silver nanoparticles are considered to apply a silver paste for electrode because of their high conductivity. However, the dispersion of silver nanoparticles in electronically conductive adhesives (ECAs) restricts them used as conductive fillers. A simple method had enabled the synthesis of silver nanoparticles by reducing silver nitrate with ethanol in the presence of poly(N-vinylpyrrolidone) (PVP). Reaction conditions, such as silver nitrate concentration, PVP concentration, reaction time, and reaction temperature, had been studied. Fine dispersion and narrow size distribution of silver nanoparticles were obtained. They were added to ECAs by re-dispersing them in ethanol while it was used as the diluent to adjust the volatility of ECAs, preventing them from the aggregation and increasing the chance to fill the gaps between silver flakes. This proposed process offers the possibility to effectively use these synthesized silver nanoparticles for improving the conductivity of ECAs.