A comparison has been carried out of the behavior of Cs adsorbed on the basal plane of MoS2before and after substrate structural changes caused by heat treatment. Extensive heating of the MoS2crystal resulted in a loss of its layer structure. Cesium on MoS2(0001) forms clusters in contrast to its uniform adsorption on metals and semiconductors. As the layer structure is lost by heating, Cs clustering is strongly affected and there is a tendency towards a more uniform distribution of the adatoms. This indicates that the layer-compound character of MoS2might be responsible for Cs clustering. © 1984.
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