Abstract
Abstract The coadsorption of K and O2 on MoS2(0001) at RT, has been investigated by LEED, AES, TDS and WF measurements. The sticking coefficient and the maximum amount of oxygen on the surface increase with K coverage. For θK > 0.5 the amount of desorbed oxygen increases almost linearly with θK. The oxygen interacts strongly with K and forms K-O complexes on the surface of MoS2. The TD spectra show K2O2, K2O and KO2. The interaction of the adsorbed oxygen with K causes the diffusion of intercalated K to the surface (deintercalation). The deintercalation of K to the surface helps estimating the coverage of K on MoS2
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