Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, China.
ACS Appl Mater Interfaces. 2014 Jan 8;6(1):560-7. doi: 10.1021/am404620y. Epub 2013 Dec 13.
Monodisperse copper nanoparticles with high purity and antioxidation properties are synthesized quickly (only 5 min) on a large scale (multigram amounts) by a modified polyol process using slightly soluble Cu(OH)2 as the precursor, L-ascorbic acid as the reductant, and PEG-2000 as the protectant. The resulting copper nanoparticles have a size distribution of 135 ± 30 nm and do not suffer significant oxidation even after being stored for 30 days under ambient conditions. The copper nanoparticles can be well-dispersed in an oil-based ink, which can be silk-screen printed onto flexible substrates and then converted into conductive patterns after heat treatment. An optimal electrical resistivity of 15.8 μΩ cm is achieved, which is only 10 times larger than that of bulk copper. The synthesized copper nanoparticles could be considered as a cheap and effective material for printed electronics.
通过使用略可溶的 Cu(OH)2 作为前驱体、L-抗坏血酸作为还原剂以及 PEG-2000 作为保护剂，利用改良的多元醇法可快速（仅需 5 分钟）、大规模（多克数量级）合成具有高纯度和抗氧化性能的单分散铜纳米粒子。所得铜纳米粒子的尺寸分布为 135 ± 30nm，即使在环境条件下储存 30 天后也不会发生明显氧化。铜纳米粒子可以很好地分散在油基墨水中，可通过丝印的方式将其印刷到柔性基底上，然后经过热处理转化为导电图案。实现了 15.8μΩcm 的最佳电阻率，仅为体铜的 10 倍。所合成的铜纳米粒子可用作廉价且有效的印刷电子产品材料。
