A Bendable, Stretchable Transistor with Aligned Carbon Nanotube Films

Title
A Bendable, Stretchable Transistor with Aligned Carbon Nanotube Films
Authors
이승기주용호유일환예영신문상지
Keywords
evaporative self-assembly; ion gels; semiconducting carbon nanotubes; stretchable transistors
Issue Date
2019-12
Publisher
Advanced materials interfaces
Citation
VOL 6, NO 23, 1900945
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/70747
ISSN
2196-7350
Appears in Collections:
KIST Publication > Article
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