The adsorption of Cs and residual gases on Ga0.5Al0.5As (0 0 1) β2 (2 × 4) surface: A first principles research
作者： Xiaohua Yu , Yujie Du , Benkang Chang , Honggang Wang , Meishan Wang
DOI: 10.1016/J.APSUSC.2013.11.016
关键词: Atom 、 Adsorption 、 Density functional theory 、 Residual 、 Electron 、 Work function 、 Quadrupole mass analyzer 、 Absorption (chemistry) 、 Analytical chemistry 、 Chemistry
摘要: Abstract Using quadrupole mass spectrometer (QMS), the residual gases in ultra-high vacuum system used for photocathodes activation are detected. The adsorption of Cs atom and molecules on Ga0.5Al0.5As β2 (2 × 4) surface investigated by density functional theory. Results show that lowers work function while enhance function. changes caused electron offsets between adsorbates surface. improves absorption properties harm properties.
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