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Title: Formation of unique trimer of nitric oxide on Cu(111)

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 2π{sup *} 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 2π{sup *} orbitals in a triangular configuration.
Authors:
; ; ;  [1]
  1. Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)
Publication Date:
OSTI Identifier:
22439684
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DIMERS; FCC LATTICES; MOLECULES; MONOMERS; NITRIC OXIDE; SCANNING TUNNELING MICROSCOPY; TRIANGULAR CONFIGURATION