Aerosol-Jet-Printed Preferentially Aligned Carbon Nanotube Twin-Lines for Printed Electronics
Aerosol-Jet-Printed Preferentially Aligned Carbon Nanotube Twin-Lines for Printed Electronics
复制标题
DOI：
10.1021/acsami.9b15060
复制
发表时间：
2019-11-20
影响因子：
9.5
通讯作者：
Yeong, Wai Yee
中科院分区：
文献类型：
--
作者：
Goh, Guo Liang;Agarwala, Shweta;Yeong, Wai Yee
碳纳米管（CNT）的排列对于制造高速电子器件（例如晶体管）非常重要，因为排列的CNT架构可以极大地增强电子迁移率。在这里，我们报告，为第一次，一种方法来获得优先对齐的CNT痕迹的柔性聚酰亚胺基板上利用高分辨率气溶胶喷射印刷技术和蒸发驱动的自组装过程。在存款图案中观察到CNT的自组装双线（“咖啡环”效应），并且场发射扫描电子显微镜（FESEM）图像显示在所得CNT双线中高度自有序的CNT。已经研究了各种气溶胶喷射参数以获得在30-80 μ m范围内的印刷轨道和在600-1500 nm范围内的导电轨道（单CNT双线宽度）。发现在该实验中获得的最小CNT双线使用合适的鞘-雾化器流量比为约16 μ π ι。FESEM图像的图像分析证实了在油墨周边形成对齐的CNT迹线。的线宽上的CNT的对准程度的效果进行了研究和评估。CNT迹线的电阻可通过控制打印遍数和打印速度来调节。
The alignment of carbon nanotubes (CNTs) is of great importance for the fabrication of high-speed electronic devices such as a transistor as the electron mobilities can be greatly enhanced with aligned CNT architectures. Here, we report, for the first time, a methodology to obtain preferentially aligned CNT traces on a flexible polyimide substrate utilizing the high-resolution aerosol jet printing technique and evaporation-driven self-assembly process. A self-assembled twin-line of CNT ("coffee-ring" effect) is observed in the deposit patterns, and the field-emission scanning electron microscopy (FESEM) images reveal highly self-ordered CNT in the resulting CNT twin-line. Various aerosol jet parameters have been investigated to obtain printed tracks in the range of 30-80 mu m and conductive tracks (single CNT twin-line width) in the range of 600-1500 nm. The smallest CNT twin-line obtained in this experiment is found to be approximately 16 pm using a suitable sheath-to-atomizer flow ratio. Image analysis of FESEM images confirms the formation of aligned CNT traces at the ink periphery. The effect of the line width on the degree of alignment of the CNT is studied and evaluated. The electrical resistance of the CNT trace is adjustable by controlling the number of print passes and print speed.