Wu Junqing, Deng Shaozhi, Xu Ningsheng, Chen Jun
State Key Lab of Optoelectronic Materials and Technologies, Guangdong Province Key Lab of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510275, People's Republic of China. Jiangxi Province Key Lab of Microstructure Function Materials, Jiujiang Key Lab of Novel Function Nanomaterials, School of Science, Jiujiang University, Jiujiang, 332005, People's Republic of China.
Nanotechnology. 2018 Feb 23;29(8):085708. doi: 10.1088/1361-6528/aaa449.
α-FeO nanomaterials were synthesized by thermal oxidation of pure iron foil and the effects of current aging treatment and morphology on their field emission properties were systematically investigated. The current aging treatment was found to be an efficient method to improve the field emission properties of α-FeO nanoflakes. The emission current density was largely enhanced from 0.05-5.70 mA cm under an applied electrical field of 7.8 MV m, and their threshold field decreased from than 11.0-6.6 MV m after the current aging treatment. The mechanism of the improvement in the field emission performance of α-FeO nanoflakes induced by the current aging treatment is discussed. α-FeO nanostructures with various morphologies were synthesized by adjusting the growth temperatures between 300 °C-450 °C to optimize their morphologies. α-FeO nanoflakes synthesized at 350 °C were superior field emitters with a low threshold field of 5.1 MV m, high current density of 63.4 mA cm, and stable emission, which demonstrated that α-FeO nanoflakes could be a promising material for application as field emitters.
通过纯铁箔的热氧化合成了α-FeO纳米材料，并系统研究了电流老化处理和形貌对其场发射性能的影响。发现电流老化处理是改善α-FeO纳米片场发射性能的有效方法。在7.8 MV m的外加电场下，发射电流密度从0.05-5.70 mA cm大幅提高，电流老化处理后其阈值场从11.0-6.6 MV m降低。讨论了电流老化处理引起α-FeO纳米片场发射性能改善的机理。通过将生长温度调节在300℃-450℃之间合成了具有各种形貌的α-FeO纳米结构，以优化其形貌。在350℃合成的α-FeO纳米片是优异的场发射体，具有5.1 MV m的低阈值场、63.4 mA cm的高电流密度和稳定的发射，这表明α-FeO纳米片可能是一种有前途的场发射体应用材料。
