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Synthesis of stable CucoreAgshell Ag particles for direct writing flexible paper-based electronics

机译:用于直接写入柔性纸质电子的稳定葫芦光晶颗粒的合成

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Highly conductive flexible paper-based patterns were drawn directly using a brush pen dipped in ink consisting of copper–silver core–shell with individual silver (Cu _(core) Ag _(shell) Ag) particles. Using a cost-effective and green method, the formation of these Cu _(core) Ag _(shell) Ag particles is first driven by a transmetalation reaction on the surface of copper nanoparticles between copper atoms and silver ions, and then excessive Ag ions were further reduced by the glucose to form individual Ag nanoparticles. Characterization of these particles by XRD, SEM and TGA confirm the Cu _(core) Ag _(shell) Ag structure and their stability towards oxidation. The conductivity of the bending pattern was experimentally tested with different bending angles, bending cycles and bending storage times. It was found that the silver shell with external excessive Ag NPs not only improves the packing density, but also enhancing the particle purity results in the high conductivity of the bending pattern. Sintered at a low temperature of 160 °C and after 3000 bending cycles and storage for 300 days, the linear resistivity of the pattern increased from ~5 μΩ cm to ~20 μΩ cm, 4 times higher than before the pattern was bent, which is acceptable for conductive patterns in practical applications. Thus, this approach represents a promising method for the formation of microelectrodes or electronic devices with good flexibility and conductivity.
机译:使用具有用单独的银(Cu _(核心)Ag _(壳)Ag)颗粒的铜 - 银芯壳组成的油墨直接拉伸基于柔性纸基图案。使用经济效益和绿色的方法,形成这些Cu _(核心)Ag _(壳)Ag颗粒的形成首先由铜原子和银离子之间的铜纳米颗粒表面上的传式反应驱动,然后过量的Ag离子通过葡萄糖进一步减少以形成单个Ag纳米颗粒。通过XRD,SEM和TGA对这些颗粒的表征证实CU _(核心)Ag _(壳)Ag结构及其对氧化的稳定性。用不同的弯曲角度,弯曲循环和弯曲储存时间进行实验测试弯曲图案的电导率。发现具有外部过度Ag NPS的银壳不仅改善了填充密度,而且还提高了颗粒纯度导致弯曲图案的高导电性。在160℃的低温下烧结,在3000℃弯曲循环和储存300天后,图案的线性电阻率从〜5μΩcm增加到~~20μΩcm,比图案弯曲前4倍,这是在实际应用中可以接受导电模式。因此,该方法代表了一种希望形成具有良好柔韧性和导电性的微电极或电子器件的有希望的方法。

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