In order to understand the structure of nCB monolayers adsorbed on MoS2 as observed by STM, we have built a 2D phenomenological model through which the observed structures can be interpreted in term of a commensurate-incommensurate transition monitored by the molecular length. This model is derived from the theory of frustrated smectics; it demonstrates that the two main parameters governing the structure of such monolayers are the frustration of the adsorbed monolayers and the strength of the substrate-molecule interaction, similarly to the case of physisorbed rare gas monolayers. More generally, various STM results on monolayers of elongated molecules physisorbed on a substrate can be reinterpreted which emphasizes the role of molecule-substrate interactions
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Lacaze et al. (1997) studied this question.