Abstract
The adsorption of CO on Pd(111) has been studied with scanning tunneling microscopy in the very low coverage regime. Isolated CO molecules were imaged with two different corrugations of ∼0.25 Å and ∼0.15 Å, which are attributed to adsorption of the hcp and fcc hollow sites. Total energy calculations reveal that these two sites are the most favorable ones. Calculated image profiles using the ESQC method agree well with the experimental corrugations.
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