Liquid-crystalline processing of highly oriented carbon nanotube arrays for thin-film transistors
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- Liquid-crystalline processing of highly oriented carbon nanotube arrays for thin-film transistors
- Ko, Hyunhyub; Tsukruk, Vladimir V.
- Carbon nanotube arrays; CNT arrays; Micropatterned geometry; Tilted drop casting
- Issue Date
- AMER CHEMICAL SOC
- NANO LETTERS, v.6, no.7, pp.1443 - 1448
- We introduce a simple solution-based method for the fabrication of highly oriented carbon nanotube (CNT) arrays to be used for thin-film transistors. We exploit the liquid-crystalline behavior of a CNT solution near the receding contact line during tilted-drop casting and produced long-range nematic-like ordering of carbon nanotube stripes caused by confined micropatterned geometry. We further demonstrate that the performance of thin-film transistors based on these densely packed and uniformly oriented CNT arrays is largely improved compared to random CNTs. This approach has great potential in low-cost, large-scale processing of high-performance electronic devices based on high-density oriented CNT films with record electrical characteristics such as high conductance, low resistivity, and high career mobility.
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