Abstract
The adsorption of mercury on Fe(100) has been studied by Auger Electron Spectroscopy, LEED and thermal desorption measurements. Mercury adsorbs at room temperature to form a (1 × 1) monolayer with an initial sticking probability close to unity and a heat of adsorption of −109±12 kJmol−1. The equilibrium adsorption isotherms show evidence of repulsive adsorbate-adsorbate lateral interactions. The experimental adsorption isotherms were compared with a theoretical model using a localized adlayer model within the quasi-chemical approximation. Good agreement was found using a repulsive pairwise interaction potential of 5.4±0.5 kJmol−1. The complex desorption behaviour is shown to be broadly consistent with an activation energy for desorption which increases with coverage due to the lateral interactions. Comparison is made with the Hg/W (100) system which exhibits attractive lateral interactions. The difference in behaviour is attributed to the size of the mercury atom compared with that of the clean surface net.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
