One-dimensional nanoclustering of the Cu(100) surface under CO gas in the mbar pressure range

Journal Article · Thu Sep 01 00:00:00 EDT 2016 · Surface Science

DOI:https://doi.org/10.1016/j.susc.2016.04.016· OSTI ID:1565441

Eren, Baran; Zherebetskyy, Danylo; Hao, Yibo; Patera, Laerte L.; Wang, Lin-Wang; Somorjai, Gabor A.; Salmeron, Miquel

The bulk terminated Cu(100) surface becomes unstable in the presence of CO at room temperature when the pressure reaches the mbar range. Scanning tunneling microscopy images show that above 0.25 mbar the surface forms nanoclusters with CO attached to peripheral Cu atoms. At 20 mbar and above 3-atom wide one-dimensional nanoclusters parallel to < 001 > directions cover the surface, with CO on every Cu atom, increasing in density up to 115 mbar. Density functional theory explains the findings as a result of the detachment of Cu atoms from step edges caused by the stronger binding of CO relative to that on flat terraces.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of California, Oakland, CA (United States)
• Sponsoring Organization: USDOE Office of Science; USDOE
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1565441
• Journal Information: Surface Science, Journal Name: Surface Science Journal Issue: C Vol. 651; ISSN 0039-6028
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

Chemistry
Physics