引用本文:
张彤, 吴强, 胡安, 毛福明, 杨学谦. 电子诱导脱附研究钨表面O2对N2的置换吸附[J]. 物理化学学报,
2003, 19(08): 686-688.
doi:
10.3866/PKU.WHXB20030802
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
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
电子诱导脱附研究钨表面O2对N2的置换吸附
摘要:
实验测量了室温高真空条件下,多晶W表面O2和N2的电子诱导脱附（ESD）阈值能量.O2-W吸附对的ESD能量约为15.5 eV, N2-W吸附对的ESD能量约为13.8 eV.实验结果具有良好的可重复性.利用ESD阈值能量研究了多晶W表面O2对N2的置换吸附过程,表明在一定的时间间隔内,O2可以置换吸附在多晶W表面的N2,且该过程不可逆.对实验结果进行了分析.
English
Study of Displacement Adsorption of N2 by O2 on Surface of Polycrystalline W via Threshold Energy of Electron-stimulated Desorption
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.
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