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Title: Low-energy electron microscopy of CO/Pt(111) surface diffusion by nonequilibrium coverage profile evolution
Authors: Yim, Chi Ming
Man, K. L.
Xiao, Xudong
Altman, M. S.
Keywords: Surface diffusion
Laser beam effects
Issue Date: 30-Oct-2008
Citation: Physical review B, v. 78, iss. 15, p. 155439, 2008
Abstract: The adsorption and diffusion of CO molecules on a Pt(111) surface have been studied using low-energy electron microscopy (LEEM). The explicit relationship between LEEM image intensity and CO coverage that is determined during adsorption is used to characterize nonequilibrium CO coverage profiles that are subsequently prepared by laser-induced thermal desorption. Real-time observations of the temporal evolution of these profiles toward equilibrium uniform coverage distributions are analyzed by predictive and inverse solutions of the diffusion equation. These two methods determine consistently the detrimental effect on diffusion of the laser-induced surface damage that is observed directly with LEEM. The inverse method also provides independent information on the coverage dependence of diffusion with high coverage resolution.
Rights: Physical Review B © copyright 2008 American Physical Society. The journal's web site is located at
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