Abstract
The chemisorption of CO on ultrathin copper layers on Ru(001) has been investigated using a supersonic molecular beam and temperature programmed desorption. We are comparing the adsorption kinetics of CO on clean Ru(001) with those on a pseudomorphic Cu monolayer and a fully relaxed Cu(111) multilayer (>40 layers) on Ru(001). For all three surfaces, a decrease of the initial sticking coefficient, S 0, with increasing beam energy was observed. For beam energies below 0.3 eV S 0 is highest on the Cu monolayer, even though the binding energy of CO is significantly lower than on Ru(001). For higher energies S 0 scales with the CO binding energy on the different substrates. The dependence of S 0 of a low energy CO beam (0.09 eV) on the copper coverage is consistent with the Stranski–Krastanov growth mode of Cu on Ru(001) that is known from STM measurements.
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.
