Stable Electron Field Emission from CeO2 Nanowires by Hydrothermal Method

• 来源期刊: 中国物理快报(英文版)
• 年，卷（期）: 2007,（8）
• 页码范围: 2423-2425
• 页数: 3页
• 语种: 英文

摘要

CeO2 nanowires are successful synthesized by hydrothermal method and their field emission (FE) properties are investigated. The turn-on electric field is 5.8 V/μm at an emitter-anode spacing of 700μm. The FE current is stable and the current fluctuations are less than 3% over 5 h. All the plotted Fowler-Nordheim curves yield straight lines, which are in agreement with the Fowler-Nordheim theory. The relationship between the field enhancement factorβ and the emitter-anode spacing d follows a universal equation. Our results imply that the CeO2 nanowires are promising materials for fabricating FE cathodes.