Flexible three-dimensional CeB6 nanowire arrays and excellent field emission emitters
| Autor: | Yongsong Luo, Yanrui Wang, Jinyou Xu, Yangyang Chang, Qishang Wang, Bebnhai Yu, Pengfei Guo, Junqi Xu, Haibin Sun, Can Fu, Liu Jiangfeng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanowire 02 engineering and technology Electron 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Materials Chemistry Cerium hexaboride High-resolution transmission electron microscopy business.industry Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Flexible electronics Cathode 0104 chemical sciences Anode Field electron emission chemistry Mechanics of Materials Optoelectronics 0210 nano-technology business |
| Zdroj: | Journal of Alloys and Compounds. 729:997-1003 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.09.240 |
| Popis: | We have developed an effective chemical-vapor-deposition method to fabricate large-scale cerium hexaboride nanowire arrays on flexible carbon substates. The nanowires show diameters of 80–200 nm and lengths of 5–30 μm. The high resolution transmission electron microcopy (HRTEM) indicates that the nanowire is of high crystalline with the growth orientation of [001]. The field emission of these nanowires shows favorable electron emission properties, including the turn-on fields of 1.76 V μm −1 , threshold fields of 3.60 V μm −1 and high field emission enhancement factors of 2203 ± 27, respectively. The field emission properties depending on the gap between the anode and cathode are also investigated. The results show that the turn-on fields and threshold fields decrease from 1.76 and 3.60 V μm −1 to 1.28 and 2.77 V μm −1 , respectively; whereas the field emission enhancement factors increase from 2203 ± 27 to 4012 ± 66 with the anode-cathode distance increasing from 500 to 700 μm. The excellent field emission performances indicate the promising application prospects of this material in flexible electronics and optoelectronics, such as high light electron sources, flat panel displays and thermal electrical power converters. |
| Databáze: | OpenAIRE |
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