Abstract
Initially we make a brief introduction to surface analysis with emphasis on the importance of surface science, basic concepts of surfaces, adsorption processes, the ultra high vacuum and surface analysis techniques. Next we describe the experimental study of Li on MoS2. The results suggest that Li intercalates into the bulk of MoS2. During the Li intercalation, two events take place: a) a change of MoS2 structure either by dissociation of MoS2 to Li2S and metallic Mo or by a 2H → 1T phase transition; b) an intercalation reaction according to the band model. In order to promote the latter, the Li flux must be relatively low and the substrate temperature elevated. The minimum flux of Li deposition at certain temperatures across the van der Waals planes of MoS2, necessary to prevent any change of MoS2 structure other than the intercalation reaction according to the band model, is given by an equation. This flux depends mainly upon the coefficient of diffusion of Li across the van der Waals planes of MoS2.
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