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Inter-Shell Sliding in Individual Few-Walled Carbon Nanotubes for Flexible Electronics
Haomin Wang1, Muqiang Jian1, Shuo Li1
1Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|July 28, 2023
Summary
Few-walled carbon nanotubes (FWCNTs) exhibit linear electrical current changes with controllable inter-shell sliding. This discovery enables novel flexible devices and human-machine interfaces, opening new avenues in electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Few-walled carbon nanotubes (FWCNTs) consist of multiple coaxial shells.
- Inter-shell sliding in FWCNTs can alter electrical properties but is experimentally challenging.
- Previous research has not explored the electromechanical response of FWCNT inter-shell sliding.
Purpose of the Study:
- To investigate the electromechanical response of FWCNTs induced by inter-shell sliding.
- To demonstrate controllable and reversible inter-shell sliding in centimeter-long FWCNTs.
- To develop FWCNT-based flexible devices for novel applications.
Main Methods:
- Grown centimeter-long FWCNTs using chemical vapor deposition.
- Developed a silk fibroin-assisted transfer technique for long CNTs.
- Fabricated flexible devices using FWCNTs@silk films and applied tensile stress.
Main Results:
- Observed reversible and linear electrical current variation with inter-shell sliding.
- Validated findings with a proposed inter-shell tunneling model.
- Demonstrated reliable control of electrical current in flexible devices via tensile stress.
Conclusions:
- Inter-shell sliding in FWCNTs leads to predictable electromechanical behavior.
- FWCNT-based flexible devices show promise for human-machine interfaces.
- The principles may extend to 2D layered materials for advanced electronics.
