STM investigations of CO coadsorption with O and with S on Ni(110)
The interaction between CO coadsorbed with oxygen and sulfur on Ni (110) has been studied with room temperature STM and LEED. In the case of CO/O/Ni(110)-(θo≤0.3 ML), it is found that due to a large local repulsion between the differing species, the coadsorbed species phase separate into large domains of O-(3 × 1) and CO-p2mg(2 × 1) structure. Similarly in the case of CO/S/Ni(110)-(θs≤0.4 ML), at low local coverages of coadsorbed CO, island segregation of CO and S-c(2 × 2) is observed. At locally saturated CO coverage, the S-c(2 × 2) structure transforms into long -S-S- chains running predominantly along the  direction and separated by a local p2mg(2 × 1)-CO structure; this transformation is attributed to the large CO-CO repulsion in the condensed overlayer structure. © 1994.
Publication Source (Journal or Book title)
Sprunger, P., Besenbacher, F., Stensgaard, I., & Lægsgaard, E. (1994). STM investigations of CO coadsorption with O and with S on Ni(110). Surface Science, 320 (3), 271-280. https://doi.org/10.1016/0039-6028(94)90315-8