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The adsorption behaviour and especially the geometric structure of a large organic molecule, end-capped quaterthiophene (EC4T), on Ag(111) has been studied using TPD, LEED and STM. Three different peaks in the TPD spectra of the undissociated molecule represent the desorption of the multilayer, the bilayer and a small fraction of the monolayer during a structural phase transition. The majority of...
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