Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 141, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4896558
Keywords
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Funding
- Japan Society for the Promotion of Science
- Grants-in-Aid for Scientific Research [25288006, 25610073, 26110515] Funding Source: KAKEN
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We report that NO molecules unexpectedly prefer a trimeric configuration on Cu(111). We used scanning tunneling microscopy (STM) at 6 K, and confirmed that the NO molecule is bonded to the face-centered-cubic hollow site in an upright configuration. The individual NO molecule is imaged as a ring protrusion, which is characteristic of the doubly degenerate 2 pi* orbital. A triangular trimer is thermodynamically more favorable than the monomer and dimer, and its bonding structure was characterized by STM manipulation. This unique behavior of NO on Cu(111) is ascribed to the threefold symmetry of the surface, facilitating effective mixing of the 2 pi* orbitals in a triangular configuration. (C) 2014 AIP Publishing LLC.
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