A Bendable, Stretchable Transistor with Aligned Carbon Nanotube Films
- A Bendable, Stretchable Transistor with Aligned Carbon Nanotube Films
- 이승기; 주용호; 유일환; 예영신; 문상지
- evaporative self-assembly; ion gels; semiconducting carbon nanotubes; stretchable transistors
- Issue Date
- Advanced materials interfaces
- VOL 6, NO 23, 1900945
- Controlling the packing density and degree of alignment of carbon nanotubes is essential for obtaining optimal charge transport properties in carbon nanotube transistors. Here, a method is introduced for evaporative self-assembly at the air– water interface to deposit continuous films of well-aligned, uniform semiconducting bundle nanotubes for stretchable and bendable transistor applications. Polymer-wrapped nanotubes in organic ink are dropped on the water surface and diffused at the air– water interface to deposit aligned semiconducting single-walled carbon nanotubes on a partially submersed substrate. The speed dependency of the substrate is also elucidated. The optimized conditions enable alignment within ±5° at a packing density of ≈ 12.5 nanotubes μm− 1 with continuously well-ordered layers. The semiconducting singlewalled carbon nanotube films enabled a high degree of stretchability, with the flexible nature of the ion gel maintaining the charge properties of the device. The resulting ion-gel-based field effect transistor devices have a high mobility of 5.11 cm2 V− 1 s− 1 and an on/off ratio >104 under both bending and elongation and demonstrate a continuous performance over 1000 stretching cycles.
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