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Citation: Zhang Tong, Wu Qiang, Hu An, Mao Fu-Ming, Yang Xue-Qian. Study of Displacement Adsorption of N₂ by O₂ on Surface of Polycrystalline W via Threshold Energy of Electron-stimulated Desorption[J]. Acta Physico-Chimica Sinica, ;2003, 19(08): 686-688. doi: 10.3866/PKU.WHXB20030802 shu

Study of Displacement Adsorption of N₂ by O₂ on Surface of Polycrystalline W via Threshold Energy of Electron-stimulated Desorption

1.
Electronic Engineering Department, Southeast University, Nanjing　210096; National Laboratory of Solid State Microstructures and Physics Department, Nanjing University, Nanjing　210093; School of Mathematics ＆ Computer Science, Nanjing Normal University, Nanjing　210097

Received Date: 25 November 2002
Available Online: 15 August 2003

The threshold energies of electron-stimulated desorption of N2 and O2 from polycrystalline W in vacuum (1×10－3 Pa) at T=300 K are measured. For O2-W couple, the threshold energy is about 15.5 eV; For N2-W couple, the threshold energy is about 13.8 eV. The displacement adsorption of N2 by O2 from the surface of polycrystalline W is studied using the measured threshold energy. The result shows that within a given time interval, N2 could be displaced by O2 on the surface of W, but the opposite process could not occur.
- Electron-stimulated desorption;Threshold energy;Displacement;　Adsorption;Modulation
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Study of Displacement Adsorption of N2 by O2 on Surface of Polycrystalline W via Threshold Energy of Electron-stimulated Desorption

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通讯作者: 陈斌, bchen63@163.com

Study of Displacement Adsorption of N₂ by O₂ on Surface of Polycrystalline W via Threshold Energy of Electron-stimulated Desorption