MXene-tailored CNT cold cathodes and self-powered electron emitters toward plasma generation
Abstract
The fabrication of carbon nanotube (CNT) field emitters usually involves a complicated process and shows poor adhesion to the substrate, which leads to inferior electron emission. Taking advantage of Ti3C2 MXene in film-forming, we have prepared CNT/MXene field emitters on various substrates. The emitter on stainless steel achieves an outstanding continuous emission density of 125 mA cm−2 and a pulse emission up to 750 mA cm−2. In addition, the arrayed CNT/MXene emitter on structured polydimethylsiloxane displays a current density of 73.9 mA cm−2 at a low field of 2.5 V µm−1, as well as good stability for 13.8 h. Meanwhile, the CNT/MXene emitter could operate when powered by a triboelectric nanogenerator, and the result indicates that CNT/MXene emitter can be used as a generator for producing plasma in air. The work opens a strategy to fabricate superior CNT cathodes on various substrates and holds great promise for practical applications in cold electron vacuum electronics and self-powered devices.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
Xinyi Wang
Yarong Zhou
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University 1 , Lanzhou 730070,
Yun Zhao
Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering
Jiangtao Chen
Jian Wang
Bingjun Yang
Research Center of Resource Chemistry and Energy Materials, State Key Laboratory of Solid Lubrication
Andong Wu
Institute of Modern Physics, Chinese Academy of Sciences 3 , Lanzhou 730000,
Xuqiang Zhang
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University , Lanzhou 730070,
Jianbiao Chen
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University , Lanzhou 730070,
Yan Li