Abstract
Room temperature (RT) adsorption of potassium (K) on NiO(100) was studied with LEED, AES, TDS and WF measurements. The LEED pattern showed a background increase and no extra spots. The WF of NiO upon potassium adsorption decreased from 4.4 eV to a saturation value near 1.3 eV without a minimum. The TD spectra were not broadened towards RT at saturation. Thermal desorption revealed two states. The appearance of the second state is correlated with a sudden decrease of the sticking coefficient as evidenced by AES. The O(520 eV) Auger peak of NiO was shifted upon adsorption, indicating ionic bonding between alkali adatoms and substrate oxygen. A correlation of the experimental results suggests that K on NiO forms clusters and not uniform adlayers as on metals and most semiconductors.
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.
