An effective approach is required to pattern graphene with high spatial resolution and accuracy for advanced graphene-based sensors. In this work, we describe a simple and effective strategy for direct writing micro-scale graphene patterns by drop-on-demand (DoD) electrohydrodynamic jet (E-Jet) printing, using a highly concentrated graphene dispersion. The uniform micro-scale graphene patterns were formed by droplets produced under the electric field “pulling” force, these droplets are far smaller than the inner diameter of nozzle, which can effectively avoid nozzle clogging. With the control of pulse voltage width and frequency, different micro-scale graphene patterns were directly printed using DoD E-Jet printing technique. Graphene lines with a thickness of 5 nm were produced for 1 time printing, which provided a resistivity of 4.2 mΩ·cm. In addition, the graphene layer was directly written on the Pt microelectrodes to form Graphene/Pt (G/Pt) composite microelectrodes. The el...

中文翻译：

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石墨烯及其复合微电极的按需按需电动流体喷射印刷技术，用于高性能电化学传感

对于基于石墨烯的先进传感器，需要一种有效的方法来以高空间分辨率和精度对石墨烯进行图案化。在这项工作中，我们描述了一种简单有效的策略，该方法通过使用高度浓缩的石墨烯分散液按需滴（DoD）电流体动力喷射（E-Jet）印刷来直接写入微型石墨烯图案。均匀的微米级石墨烯图案是由在电场“拉”力下产生的液滴形成的，这些液滴远小于喷嘴的内径，可有效避免喷嘴堵塞。通过控制脉冲电压的宽度和频率，可以使用DoD E-Jet印刷技术直接印刷出不同的微尺度石墨烯图案。制备5nm厚的石墨烯线用于1次印刷，其提供4.2mΩ·cm的电阻率。另外，将石墨烯层直接写在Pt微电极上以形成石墨烯/ Pt（G / Pt）复合微电极。埃尔...