Wu Junqing, Wang Bo, Yi Futing, 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.
RSC Adv. 2018 Jan 3;8(2):752-760. doi: 10.1039/c7ra12791j. eCollection 2018 Jan 2.
WO nanowires were synthesized by thermal evaporation, and the effects of X-ray irradiation on their crystalline structure, chemical composition, and field emission properties were systematically investigated. High-energy X-ray irradiation created nanoprotrusions on the surface of WO nanowires and introduced crystalline slipping in the lattice. X-ray photoelectron spectroscopy results showed that the content of lattice oxygen increased and nitrogen was incorporated into the WO nanowires after X-ray irradiation. Nevertheless, a stable and high current emission still could be obtained from the WO nanowires after X-ray irradiation, with a slight increase in the threshold field from 6.4 to 7.9 MV m. The mechanism of the change in crystalline structure, chemical composition, and field emission performance of WO nanowires induced by X-ray irradiation is discussed.
通过热蒸发合成了WO纳米线，并系统研究了X射线辐照对其晶体结构、化学成分和场发射性能的影响。高能X射线辐照在WO纳米线表面产生了纳米突起，并在晶格中引入了晶体滑移。X射线光电子能谱结果表明，X射线辐照后晶格氧含量增加，且氮被掺入到WO纳米线中。然而，X射线辐照后的WO纳米线仍能获得稳定且高的电流发射，阈值场从6.4 MV m略有增加至7.9 MV m。讨论了X射线辐照引起的WO纳米线晶体结构、化学成分和场发射性能变化的机制。
