Investigation of 1D chain formation of CO on Pd(1 1 0) by low temperature scanning tunneling microscope

Yousoo Kim, Hiroyuki S. Kato, Tadahiro Komeda, Maki Kawai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In order to investigate intermolecular interaction between adsorbed molecules, we directly observed adsorbed structures of low coverage CO on Pd(1 1 0) using a low-temperature (4.7 K) scanning tunneling microscope. We found that the CO molecules dosed at room temperature prefer to form a one-dimensional (1D) chain along [1 1̄ 0] during the cooling down, in contrast to a random distribution of CO dosed at near liquid He temperature. These results show the existence of an attractive force between CO molecules chemisorbed on Pd(1 1 0) along [1 1̄ 0]. Here, we discuss effective intermolecular interactions for the 1D chain formation with energy estimations of individual interaction elements between chemisorbed CO molecules.

Original languageEnglish
Pages (from-to)60-65
Number of pages6
JournalSurface Science
Issue numberPART 1
Publication statusPublished - 2001 Jun 20
Externally publishedYes


  • Carbon monoxide
  • Chemisorption
  • Low index single crystal surfaces
  • Palladium
  • Scanning tunneling microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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