A carbon nanotube (CNT) has been used as electronic materials for functional electronic devices such as transistors, transparent electrodes, sensors, and Joule heating devices owing to their unique properties and high aspect ratios. However, the CNT network is randomly aligned on sheets fabricated by the spreading of a CNT suspension. In order to fabricate directional CNT network, we demonstrate the large scale alignment and assembly of CNTs by a dielectrophoretic external force, which is applied by an alternating current (AC). The alignment of the CNT network was monitored to have 2.6–17.5 times lower resistance values in the direction of the applied electrical field than in the vertical directions of the electrical field. We demonstrated that the resistance values were increased in the vertical direction by the multiple AC alignment process with layer-by-layer. Furthermore, the directionally aligned CNT network was transferred onto a nitrocellulose sheet via solvent evaporation and the electrical properties were measured. Even though we demonstrated only the limited MAAP process with CNT, the directional MAAP including transfer process could be used for diverse applications such as Joule heating transparent electrodes and flexible sensor devices.

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IEEE GRSS 孟买分会活动 [章节]


碳纳米管（CNT）由于其独特的性能和高纵横比，已被用作功能电子器件的电子材料，例如晶体管、透明电极、传感器和焦耳加热装置。然而，CNT 网络在通过 CNT 悬浮液铺展而制造的片材上随机排列。为了制造定向碳纳米管网络，我们展示了通过交流电（AC）施加介电泳外力来大规模排列和组装碳纳米管。经监测，CNT 网络的排列在施加电场的方向上的电阻值比在电场的垂直方向上的电阻值低 2.6-17.5 倍。我们证明了通过逐层的多重交流对准工艺，电阻值在垂直方向上增加。此外，通过溶剂蒸发将定向排列的碳纳米管网络转移到硝化纤维素片上，并测量其电性能。尽管我们仅演示了使用 CNT 的有限 MAAP 工艺，但包括转移工艺的定向 MAAP 可用于多种应用，例如焦耳加热透明​​电极和柔性传感器设备。