Journal
NANO LETTERS
Volume 16, Issue 3, Pages 1768-1775Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04773
Keywords
Spiral fiber; carbon nanotube; nanotextile; fiber-shaped device; gas sensor
Categories
Funding
- National Natural Science Foundation of China [NSFC 51325202, 51502267]
- China Postdoctoral Science Foundation [2015M582200]
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Conventional straight fibers spun from carbon nanotubes have rather limited deformability; creating a spiral structure holds the promise to break this shape restriction and enhance structural flexibility. Here, we report up to one meter length threads containing purely single-walled nanotubes twisted into spiral loops (about 1.3 X 10(5) loops per meter) with tunable fiber diameters and electrical conductivity. Because of significant increase of the loop number and long-range homogeneity, the fibers display many unique properties (e.g., self-shrinking and forming extremely entangled structure, fast stretching with great resilience, large-degree axial and lateral deflection, and excellent fatigue resistance) that are difficult to achieve in straight yarns or short helical segments. They also have potential applications as macroscopic fiber-shaped temperature sensors and deformable gas sensors. Our long spiral fibers may be configured into versatile structures such as nanotextiles for developing wearable electronics and multifunctional fabrics.
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