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Low temperature chemical sintering of inkjet-printed Zn nanoparticles for highly conductive flexible electronic components
npj Flexible Electronics ( IF 14.6 ) Pub Date : 2021-07-07 , DOI: 10.1038/s41528-021-00111-1
Subimal Majee 1 , Mikael C. F. Karlsson 1, 2 , Pawel Jerzy Wojcik 1, 3 , Anurak Sawatdee 1 , Mohammad Yusuf Mulla 1 , Naveed ul Hassan Alvi 1 , Peter Dyreklev 1 , Valerio Beni 1 , David Nilsson 1
Affiliation  

This study illustrates an innovative way to fabricate inkjet-printed tracks by sequential printing of Zn nanoparticle ink and curing ink for low temperature in situ chemical sintering. Employing chemical curing in place of standard sintering methods leads to the advantages of using flexible substrates that may not withstand the high thermal budgets of the standard methods. A general formulation engineering method is adopted to produce highly concentrated Zn ink which is cured by inkjet printing an over-layer of aqueous acetic acid which is the curing agent. The experimental results reveal that a narrow window of acid concentration of curing ink plays a crucial role in determining the electrical properties of the printed Zn nanoparticles. Highly conductive (~105 S m−1) and mechanically flexible printed Zn features are achieved. In addition, from systematic material characterization, we obtain an understanding of the curing mechanism. Finally, a touch sensor circuit is demonstrated involving all-Zn printed conductive tracks.



中文翻译:

用于高导电柔性电子元件的喷墨印刷锌纳米颗粒的低温化学烧结

本研究展示了一种通过连续打印锌纳米粒子墨水和固化墨水进行低温原位化学烧结来制造喷墨打印轨迹的创新方法。使用化学固化代替标准烧结方法会带来使用柔性基板的优势,这些基板可能无法承受标准方法的高热预算。采用通用的配方工程方法生产高浓度锌油墨,通过喷墨印刷一层作为固化剂的含水醋酸进行固化。实验结果表明,固化油墨酸浓度的窄窗口在确定印刷的 Zn 纳米颗粒的电性能方面起着至关重要的作用。高导电性(~10 5  S m -1) 和机械柔性印刷锌特征。此外,通过系统的材料表征,我们可以了解固化机理。最后,展示了一个涉及全锌印刷导电轨道的触摸传感器电路。

更新日期:2021-07-07
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