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

Key wordsElectron-stimulated desorption      Threshold energy      Displacement       Adsorption      Modulation     
Received: 25 November 2002      Published: 15 August 2003
Corresponding Authors: Zhang Tong     E-mail: njutonnyz@sina.com
Cite this article:

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. Acta Physico-Chimica Sinica, 2003, 19(08): 686-688.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20030802     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2003/V19/I08/686

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