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Nano Research

Article Title

Monolithic superaligned carbon nanotube composite with integrated rewriting, actuating and sensing multifunctions

Authors

Peidi Zhou, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China; Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou 350117, China
Wei Zhang, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China; Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou 350117, China
Luzhuo Chen, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China; Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou 350117, ChinaFollow
Jian Lin, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China; Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou 350117, China
Zhiling Luo, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China; Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou 350117, China
Changhong Liu, Tsinghua-Foxconn Nanotechnology Research Center, Department of Physics, Tsinghua University, Beijing 100084, China
Kaili Jiang, Tsinghua-Foxconn Nanotechnology Research Center, Department of Physics, Tsinghua University, Beijing 100084, China; State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China

Keywords

carbon nanotube, actuator, sensor, rewritable media, multifunctional

Abstract

Multifunctionality has become a mainstream trend in the development of smart clothing and flexible wearable devices. Nevertheless, it remains a grand challenge to realize multiple functions, such as sensing, actuating and information displaying, in one single multifunctional material. Here, we present one multifunctional integration strategy by employing monolithic superaligned carbon nanotube (SACNT) composite, which can leverage three different functions through fascinating features of SACNT. Firstly, by using thermochromic dye as a color-memorizing component and SACNT as a photothermal converter, the composite film can be utilized as a flexible rewritable medium. It demonstrates excellent rewriting performances (reversibility > 500 times). Secondly, the composite can be tailored to fabricate an actuator, when its length direction is along the SACNT alignment. The actuator shows a bending-morphing when illuminated by near-infrared light. The morphing is attributed to a large difference in volume change between the SACNT and polymer when the SACNT absorbs the optical energy and heats the composite. Thirdly, owing to the unique anisotropy of SACNT, the composite is easily to be stretched in the direction perpendicular to the SACNT alignment, accompanied by a change in electrical resistance. Therefore, the composite is able to be used as a strain sensor. Finally, we fabricate two smart wearable devices to demonstrate the applications, which realize the functions of human-motion detection (sensing) and rewritable information display (rewriting) simultaneously. This multifunctional SACNT composite is expected to have potential applications in the next-generation wearable devices, smart clothing and so on.

Publisher

Tsinghua University Press

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