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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Highly conductive short chain carboxylic acid encapsulated silver nanoparticle based inks for direct write technology applications
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Highly conductive short chain carboxylic acid encapsulated silver nanoparticle based inks for direct write technology applications

机译：用于直接写入技术应用的高导电性短链羧酸封装的银纳米颗粒基油墨

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摘要

In this study silver nanopartides were synthesized with short chain (C6-C10) carboxylic acids as capping agents and prepared as conductive inks for fabricating electrically conductive patterns using direct write technologies. The structural characterization of as-synthesized nanopartides revealed that the particles are spherical in shape with narrow size distribution (4.1 to 4.7 nm) and have face centered cubic crystal structure. Silver-particle-based inks were prepared by dispersing the particles in toluene and separating non-dispersing particles from the inks. The loading of silver particles in the solvent was increased with the increasing chain length of capping agents. As a result, inks with a wide range of nanoparticulate concentrations (～3 to 66 wt%) were able to be prepared and most of these inks were stable for at least a month. All the inks exhibited shear thinning behavior and this shear thinning became more prominent for higher concentration inks. As the nanoparticle concentration of the inks was increased, surface tension was decreased and the contact angles of the inks with the Kapton~R and glass were increased. Printing of microelectrodes, lines and films was carried out using aerosol jet printing and ultrasonic spray coating. The conductivity of printed microelectrodes was 10 to 87% of the bulk silver conductivity with the sintering temperatures as low as 130 to 250 °C depending on the ink used.
机译：在这项研究中，使用短链（C6-C10）羧酸作为封端剂合成了纳米银粒子，并使用直接写入技术将其制备为用于制造导电图案的导电油墨。合成后的纳米粒子的结构特征表明，这些粒子呈球形，尺寸分布窄（4.1至4.7 nm），并且具有面心立方晶体结构。通过将颗粒分散在甲苯中并从油墨中分离出非分散颗粒来制备银颗粒基油墨。随着封端剂链长的增加，银颗粒在溶剂中的负载量也增加。结果，可以制备具有宽范围的纳米微粒浓度（约3至66 wt％）的油墨，并且这些油墨大多数都可以稳定至少一个月。所有油墨都表现出剪切稀化行为，并且对于更高浓度的油墨，这种剪切稀化变得更加突出。随着油墨中纳米粒子浓度的增加，表面张力降低，油墨与Kapton_R和玻璃的接触角增加。使用气溶胶喷射印刷和超声喷涂进行微电极，线和膜的印刷。印刷微电极的电导率是整体银电导率的10％到87％，而烧结温度低至130到250℃，具体取决于所使用的油墨。

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